SOUTHWESTERN PENNSYLVANIA COMMISSION

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1 About These Data This file contains the 100% count of total population for the municipalities in Allegheny County for the decennial years 1930 to The 100% count of population comes from the questions asked of all persons in each decennial census. Municipalities no longer in existence are included. The "Notation" section contains the following items: (1). Revisions are sometimes made to population figures that were previously published; this spreadsheet contains the revised population figures. Municipalities that have a revised population figure for a particular decennial census year have the entry "Population revision" in column "Type of Notation". Column "Notation" has the original population and the revised population, as well as the reference year. (2). During the time span of 80 years encompassed by these data, some municipalities had name changes. Municipalities that had a name change have the entry "Name change" in column "Type of Notation". A municipality may have had more than one name change. Column "Notation" has the year or time period when the name change occurred and the previous name. (3). Also, during the time span, some municipalities had boundary changes. Municipalities that had a boundary change have the entry "Boundary change" in column "Type of Notation". A municipality may have had more than one boundary change. The worksheet describes a boundary change as an area being annexed; the use of the term annexed is not the legal definition but merely to show that a municipality had a boundary change and thus has gained or lost area. Included in this category are municipalities that have been incorporated from other municipalities. Included in this category are municipalities that have been disincorporated and, thus, are no longer legal entities and were absorbed by another municipality. Column "Notation" identifies the year or time period when the boundary change occurred. This category usually has dual entries the municipality that gained area and the municipality that lost area.

2 SOUTHWESTERN PENNSYLVANIA COMMISSION Total Population by Municipality in Allegheny County, Municipal Name COUNTY TOTAL 1,374,410 1,411,539 1,515,237 1,629,821 1,605,133 1,450,195 1,336,449 1,281,666 1,223,348 Aleppo Township ,134 1,246 1,039 1,916 Aspinwall Borough 4,263 4,716 4,084 3,727 3,541 3,284 2,880 2,960 2,801 Avalon Borough 5,940 6,155 6,463 6,859 7,010 6,240 5,784 5,294 4,705 Baldwin Borough 24,489 26,729 24,714 21,923 19,999 19,767 Baldwin Township 6,371 7,738 10,743 3,004 3,026 2,680 2,479 2,244 1,992 Bell Acres Borough ,365 1,283 1,264 1,307 1,436 1,382 1,388 Bellevue Borough 10,252 10,488 11,604 11,412 11,586 10,128 9,126 8,770 8,370 Ben Avon Borough 2,472 2,516 2,465 2,553 2,713 2,314 2,096 1,917 1,781 Ben Avon Heights Borough Bethel Park, Municipality of 5,482 5,966 11,324 23,650 34,758 34,755 33,823 33,556 32,313 Blawnox Borough 2,186 2,162 2,165 2,085 1,907 1,653 1,626 1,550 1,432 Brackenridge Borough 6,250 6,400 6,178 5,697 4,796 4,297 3,784 3,543 3,260 Braddock Borough 19,329 18,326 16,488 12,337 8,795 5,634 4,682 2,912 2,159 Braddock Hills Borough 1,794 1,847 1,965 2,414 2,459 2,556 2,026 1,998 1,880 Bradford Woods Borough ,264 1,329 1,149 1,171 Brentwood Borough 5,381 7,552 12,535 13,706 13,732 11,859 10,823 10,466 9,643 Bridgeville Borough 3,939 4,459 5,650 7,112 6,717 6,154 5,445 5,341 5,148 Carnegie Borough 12,497 12,663 12,105 11,887 10,864 10,099 9,278 8,389 7,972 Castle Shannon Borough 3,810 3,970 5,459 11,836 12,036 10,164 9,135 8,556 8,316 Chalfant Borough 1,192 1,372 1,381 1,414 1,370 1, Cheswick Borough 1,053 1,241 1,534 2,734 2,563 2,336 1,971 1,899 1,746 Churchill Borough 430 1,733 3,428 4,690 4,285 3,883 3,566 3,011 Clairton City 15,291 16,381 19,652 18,389 15,051 12,188 9,656 8,491 6,796 Collier Township 6,091 7,685 8,039 8,021 6,874 5,063 4,841 5,265 7,080 Coraopolis Borough 10,724 11,086 10,498 9,643 8,435 7,308 6,747 6,131 5,677 Crafton Borough 7,004 7,163 8,066 8,418 8,233 7,623 7,188 6,706 5,951 Crescent Township 1,107 1,482 1,867 2,603 2,918 2,862 2,490 2,314 2,640 Dormont Borough 13,190 12,974 13,405 13,098 12,856 11,275 9,772 9,305 8,593 Dravosburg Borough 2,391 2,277 3,786 3,458 2,916 2,511 2,377 2,015 1,792 Duquesne City 21,396 20,693 17,620 15,019 11,410 10,094 8,525 7,332 5,565 East Deer Township 3,928 3,516 3,185 2,865 2,081 1,658 1,558 1,362 1,500 East McKeesport Borough 2,922 3,026 3,171 3,470 3,233 2,940 2,678 2,343 2,126 East Pittsburgh Borough 6,214 6,079 5,259 4,122 3,006 2,493 2,160 2,017 1,822 Eden Park Borough 1,531 Edgewood Borough 4,821 4,697 5,292 5,124 5,138 4,382 3,581 3,311 3,118 Edgeworth Borough 1,679 1,696 1,466 2,030 2,200 1,738 1,670 1,730 1,680 Elizabeth Borough 2,939 2,976 2,615 2,597 2,273 1,892 1,610 1,609 1,493 Elizabeth Township 7,479 7,831 9,978 14,159 15,525 16,269 14,712 13,839 13,271 Emsworth Borough 2,709 2,765 3,128 3,341 3,345 3,074 2,892 2,598 2,449 Etna Borough 7,493 7,223 6,750 5,519 5,819 4,534 4,200 3,924 3,451 Fawn Township 912 1,506 2,350 3,008 3,167 2,899 2,712 2,504 2,376 Findlay Township 2,775 3,252 3,638 4,537 4,602 4,573 4,500 5,145 5,060 Forest Hills Borough 4,549 5,248 6,301 8,796 9,561 8,198 7,335 6,831 6,518 Forward Township 3,626 3,991 4,292 4,692 4,496 4,335 3,877 3,771 3,376 Fox Chapel Borough 1,080 1,721 3,302 4,684 5,049 5,319 5,436 5,388 Franklin Park Borough 1,031 1,525 2,314 3,935 5,310 6,135 10,109 11,364 13,470 Frazer Township 1,639 1,521 1,319 1,707 1,887 1,509 1,388 1,286 1,157 Glassport Borough 8,390 8,748 8,707 8,418 7,450 6,242 5,582 4,993 4,483 Glen Osborne Borough Glenfield Borough Green Tree Borough 1,457 1,880 2,818 5,226 6,441 5,722 4,905 4,719 4,432 Hampton Township 3,333 3,364 6,104 10,641 12,515 14,319 15,568 17,526 18,363 Harmar Township 2,703 3,157 3,454 3,657 3,916 3,461 3,144 3,242 2,921 Harrison Township 12,387 13,161 15,116 15,710 14,448 13,252 11,763 10,934 10,461 Haysville Borough Heidelberg Borough 2,130 2,239 2,250 2,118 2,034 1,606 1,238 1,225 1,244 Homestead Borough 20,141 19,041 10,046 7,502 6,309 5,092 4,179 3,569 3,165 Indiana Township 3,131 3,723 4,196 5,751 5,621 6,080 6,024 6,809 7,253 Ingram Borough 3,866 3,904 4,236 4,730 4,902 4,346 3,901 3,712 3,330 Jefferson Hills Borough 4,138 5,585 5,534 8,280 8,512 8,643 9,533 9,666 10,619 Kennedy Township 1,311 1,778 3,142 5,806 6,859 7,159 7,265 7,504 7,672

3 SOUTHWESTERN PENNSYLVANIA COMMISSION Total Population by Municipality in Allegheny County, Municipal Name Kilbuck Township 1,651 1,772 1,520 1,930 1,694 1, Leet Township 1,272 1,326 1,905 1,239 1,646 1,854 1,731 1,568 1,634 Leetsdale Borough 2,774 2,332 2,411 2,153 1,862 1,604 1,387 1,232 1,218 Liberty Borough 906 1,084 1,900 3,624 3,594 3,112 2,744 2,670 2,551 Lincoln Borough 678 1,015 1,467 1,686 1,885 1,428 1,187 1,218 1,072 Marshall Township 1,265 1,697 1,745 2,528 2,907 2,594 4,010 5,996 6,915 McCandless, Town Of 2,653 3,494 6,488 14,582 22,404 26,191 28,781 29,022 28,457 McDonald Borough (part) McKees Rocks Borough 18,116 17,021 16,241 13,185 11,901 8,742 7,691 6,622 6,104 McKeesport City 54,632 55,355 51,502 45,489 37,977 31,012 26,016 24,040 19,731 Millvale Borough 8,166 7,811 7,287 6,624 5,815 4,772 4,341 4,028 3,744 Monroeville, Municipality of 4,687 4,689 7,841 22,446 29,011 30,977 29,169 29,349 28,386 Moon Township 2,900 3,733 7,096 10,642 18,317 20,935 19,631 22,290 24,185 Mount Lebanon 13,403 19,571 26,604 35,361 39,157 34,414 33,362 33,017 33,137 Mount Oliver Borough 7,071 6,981 6,646 5,980 5,509 4,576 4,160 3,970 3,403 Munhall Borough 12,995 13,900 16,437 17,312 16,574 14,535 13,158 12,264 11,406 Neville Township 1,532 1,469 2,310 2,400 2,017 1,416 1,273 1,232 1,084 North Braddock Borough 16,782 15,679 14,724 13,204 10,838 8,711 7,036 6,410 4,857 North Fayette Township 3,510 4,216 4,004 4,583 5,626 7,351 9,537 12,254 13,934 North Versailles Township 5,668 6,341 9,821 13,583 13,416 13,294 12,302 11,125 10,229 Oakdale Borough 1,703 1,766 1,572 1,695 2,136 1,955 1,752 1,551 1,459 Oakmont Borough 6,027 6,260 7,264 7,504 7,550 7,039 6,961 6,911 6,303 O'Hara Township 5,127 4,553 5,768 8,681 9,209 9,233 9,096 8,856 8,407 Ohio Township ,784 2,096 2,072 2,459 3,086 4,757 Penn Hills, Municipality of 13,337 15,578 25,280 51,512 62,886 57,632 51,479 46,809 42,329 Pennsbury Village Borough Pine Township 937 1,191 1,732 3,613 4,259 3,908 4,048 7,683 11,497 Pitcairn Borough 6,317 6,310 5,857 5,383 4,741 4,175 4,087 3,689 3,294 Pittsburgh City 669, , , , , , , , ,704 Pleasant Hills Borough 3,808 8,573 10,409 9,604 8,884 8,397 8,268 Plum Borough 6,339 7,046 7,200 10,241 21,932 25,390 25,609 26,940 27,126 Port Vue Borough 3,510 3,601 4,756 6,635 5,862 5,316 4,641 4,228 3,798 Rankin Borough 7,956 7,470 6,941 5,164 3,704 2,892 2,503 2,315 2,122 Reserve Township 3,108 3,094 3,533 4,230 4,151 4,306 3,866 3,856 3,333 Richland Township 1,805 2,355 3,527 6,453 7,819 7,749 8,600 9,231 11,100 Robinson Township 3,970 3,775 4,769 7,935 10,158 9,416 10,830 12,289 13,354 Ross Township 8,581 10,827 15,744 25,952 32,892 35,102 33,482 32,551 31,105 Rosslyn Farms Borough Scott Township 6,203 6,297 8,686 19,094 21,856 20,413 17,118 17,288 17,024 Sewickley Borough 5,599 5,614 5,836 6,157 5,660 4,778 4,134 3,902 3,827 Sewickley Heights Borough Sewickley Hills Borough Shaler Township 9,573 11,185 16,430 24,939 33,369 33,694 30,533 29,757 28,757 Sharpsburg Borough 8,642 8,202 7,296 6,096 5,453 4,351 3,781 3,594 3,446 South Fayette Township 9,147 9,780 9,979 10,728 9,369 9,707 10,329 12,271 14,416 South Park Township 4,396 4,399 4,540 7,384 8,187 13,535 14,292 14,340 13,416 South Versailles Township Springdale Borough 4,781 4,989 4,939 5,602 5,202 4,418 3,992 3,828 3,405 Springdale Township 1,565 1,698 1,707 1,957 2,218 1,918 1,777 1,802 1,636 Stowe Township 13,368 12,577 12,210 11,730 10,119 9,202 7,681 6,706 6,362 Swissvale Borough 16,029 15,919 16,488 15,089 13,819 11,345 10,637 9,653 8,983 Tarentum Borough 9,551 9,846 9,540 8,232 7,379 6,419 5,674 4,993 4,530 Thornburg Borough Trafford Borough (part) Turtle Creek Borough 10,690 9,805 12,363 10,607 8,308 6,959 6,556 6,076 5,349 Upper St Clair Township 1,947 2,486 3,629 8,287 15,471 19,023 19,692 20,053 19,229 Verona Borough 4,376 4,356 4,325 4,032 3,737 3,179 3,260 3,124 2,474 Versailles Borough 2,473 2,401 2,484 2,297 2,754 2,150 1,821 1,724 1,515 Wall Borough 2,236 2,098 1,850 1,493 1, West Deer Township 6,461 7,815 7,484 9,038 10,074 10,897 11,371 11,563 11,771 West Elizabeth Borough 1,074 1,297 1, West Homestead Borough 3,552 3,526 3,257 4,155 3,789 3,128 2,495 2,197 1,929

4 SOUTHWESTERN PENNSYLVANIA COMMISSION Total Population by Municipality in Allegheny County, Municipal Name West Mifflin Borough 8,167 8,694 17,985 27,289 28,070 26,322 23,644 22,464 20,313 West View Borough 6,028 7,215 7,581 8,079 8,312 7,648 7,734 7,277 6,771 Whitaker Borough 2,072 2,217 2,149 2,130 1,797 1,615 1,416 1,338 1,271 White Oak Borough 3,955 5,227 6,159 9,047 9,304 9,480 8,761 8,437 7,862 Whitehall Borough 7,342 16,075 16,450 15,143 14,451 14,444 13,944 Wilkins Township 4,127 3,884 4,261 8,272 8,749 8,472 7,585 6,917 6,357 Wilkinsburg Borough 29,639 29,853 31,418 30,066 26,780 23,669 21,080 19,196 15,930 Wilmerding Borough 6,291 5,662 5,325 4,349 3,218 2,421 2,222 2,145 2,190 The Census Bureau reported that Allegheny County in 1960 had a total population of 1,628,587, however, a Census publication notes that the population for South Fayette Township reported as 9,494 had an omission AFTER publication and was really as shown here; therefore, the accurate county population is what is displayed here. NOTE: an empty cell denotes that a municipality did not exist as a legal entity in that year SOURCE: data pertain to 100% count of total population (including revisions) from various Census publications and files covering the decennial censuses from 1930 to 2010 and were compiled by SPC in August 2011 This is the other parts of municipalities in other counties: Municipal Name McDonald Borough (part in Washington County) 2,711 2,641 2,653 2,427 2,220 2,233 1,809 1,866 1,766 Trafford Borough (part in Westmoreland County) 4,087 3,852 3,811 4,190 4,288 3,552 3,255 3,205 3,113

5 Notation on boundary changes, name changes, and population revisions, by municipality in Allegheny County Municipal Name Type of Notation Notation Aleppo Township Boundary change Between 1950 & 1960, part of municipality was annexed to Sewickley Heights Borough. Avalon Borough Population revision Year 1970, from 7,065 to 7,010. Baldwin Borough Boundary change Between 1950 & 1960, municipality was incorporated from part of Baldwin Township. Baldwin Borough Boundary change Between 1970 & 1980, part of municipality was annexed by Whitehall Borough. Baldwin Borough Population revision Year 1980, from 24,598 to 24,714. Baldwin Township Boundary change Between 1950 & 1960, part of municipality was annexed from Mount Lebanon Township. Baldwin Township Boundary change Between 1950 & 1960, part of municipality was annexed to Pittsburgh City. Baldwin Township Boundary change Between 1950 & 1960, part of municipality was annexed to Pleasant Hills Borough. Baldwin Township Boundary change Between 1950 & 1960, part of municipality was incorporated as Baldwin Borough. Baldwin Township Boundary change Year 1947, part of municipality was annexed to Castle Shannon Borough. Baldwin Township Boundary change Year 1947, part of municipality was annexed to Pittsburgh City. Baldwin Township Boundary change Year 1947, part of municipality was incorporated as Whitehall Borough, along with part of Bethel Township. Baldwin Township Population revision Year 1970, from 2,598 to 3,026. Bell Acres Borough Name change Between 1960 & 1970, from Sewickley Township to Bell Acres Borough. Ben Avon Borough Boundary change Year 1940, part of municipality was annexed from Kilbuck Township. Bethel Park, Municipality of Boundary change Between 1950 & 1960, part of municipality was annexed from Snowden Township. Bethel Park, Municipality of Boundary change Between 1950 & 1960, part of municipality was annexed to Mount Lebanon Township. Bethel Park, Municipality of Boundary change Between 1950 & 1960, part of municipality was annexed to Snowden Township. Bethel Park, Municipality of Name change Between 1960 & 1970, from Bethel Borough to Bethel Park Borough. Bethel Park, Municipality of Boundary change Year 1947, part of municipality was annexed to Castle Shannon Borough. Bethel Park, Municipality of Boundary change Year 1947, part of municipality was incorporated as Whitehall Borough, along with part of Baldwin Township. Bethel Park, Municipality of Name change Year 1949, from Bethel Township to Bethel Borough. Bethel Park, Municipality of Population revision Year 1970, from 34,791 to 34,758. Blawnox Borough Boundary change Year 1947, part of municipality was annexed from O'Hara Township. Brackenridge Borough Boundary change Year 1941, part of municipality was annexed from Harrison Township. Braddock Borough Boundary change Year 1942, part of municipality was annexed to Edgewood Borough. Braddock Borough Boundary change Year 1942, part of municipality was annexed to Wilkinsburg Borough. Braddock Borough Population revision Year 1970, from 8,682 to 8,795. Braddock Hills Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Forest Hills Borough. Braddock Hills Borough Name change Year 1946, from Braddock Township to Braddock Hills Borough. Braddock Hills Borough Population revision Year 1970, from 2,494 to 2,459. Brentwood Borough Population revision Year 1980, from 11,907 to 11,859. Bridgeville Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Upper St Clair Township. Bridgeville Borough Boundary change Year 1949, part of municipality was annexed from Upper St Clair Township. Carnegie Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Robinson Township. Carnegie Borough Boundary change Year 1948, part of municipality was annexed to Scott Township. Castle Shannon Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Mount Lebanon Township. Castle Shannon Borough Boundary change Year 1947, part of municipality was annexed from Baldwin Township. Castle Shannon Borough Boundary change Year 1947, part of municipality was annexed from Bethel Township. Castle Shannon Borough Boundary change Year 1947, part of municipality was annexed from Mount Lebanon Township (two occurrences).

6 Notation on boundary changes, name changes, and population revisions, by municipality in Allegheny County Municipal Name Type of Notation Notation Castle Shannon Borough Population revision Year 1970, from 11,899 to 12,036. Cheswick Borough Population revision Year 1970, from 2,580 to 2,563. Churchill Borough Boundary change Between 1960 & 1970, part of municipality was annexed from Penn Hills Township. Crescent Township Population revision Year 1970, from 2,801 to 2,918. Eden Park Borough Boundary change Between 1950 & 1960, municipality disincorporated into McKeesport City. Eden Park Borough Boundary change Year 1944, municipality was incorporated from part of Versailles Township. Edgewood Borough Population revision Year 1970, from 5,101 to 5,138. Edgeworth Borough Boundary change Year 1942, part of municipality was annexed from Braddock Borough. Elizabeth Borough Population revision Year 1970, from 2,206 to 2,273. Elizabeth Township Population revision Year 1970, from 15,592 to 15,525. Emsworth Borough Population revision Year 1970, from 3,332 to 3,345. Etna Borough Boundary change Year 1941, part of municipality was annexed from Shaler Township. Forest Hills Borough Boundary change Between 1950 & 1960, part of municipality was annexed to Braddock Hills Borough. Forest Hills Borough Boundary change Year 1943, part of municipality was annexed to North Braddock Borough. Forest Hills Borough Boundary change Year 1943, part of municipality was annexed to Wilkins Township. Fox Chapel Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Indiana Township. Fox Chapel Borough Boundary change Year 1940, part of municipality was annexed from Indiana Township. Fox Chapel Borough Boundary change Year 1944, part of municipality was annexed from O'Hara Township. Fox Chapel Borough Boundary change Year 1947, part of municipality was annexed from Harmar Township. Fox Chapel Borough Boundary change Year 1947, part of municipality was annexed from O'Hara Township. Fox Chapel Borough Boundary change Year 1949, part of municipality was annexed from Indiana Township. Franklin Park Borough Name change Between 1960 & 1970, from Franklin Township to Franklin Park Borough. Franklin Park Borough Boundary change Between 1970 & 1980, municipality annexed area from and detached area to Sewickley Hills Borough. Frazer Township Boundary change Year 1947, part of municipality was annexed to Tarentum Borough. Glen Osborne Borough Name change Year 2008, from Osborne Borough to Glen Osborne Borough Hampton Township Population revision Year 1980, from 14,260 to 14,319. Harmar Township Boundary change Year 1947, part of municipality was annexed to Fox Chapel Borough. Harmar Township Population revision Year 1970, from 3,899 to 3,916. Harrison Township Boundary change Year 1941, part of municipality was annexed to Brackenridge Borough. Indiana Township Boundary change Between 1950 & 1960, part of municipality was annexed to Fox Chapel Borough. Indiana Township Boundary change Year 1940, part of municipality was annexed to Fox Chapel Borough. Indiana Township Boundary change Year 1949, part of municipality was annexed to Fox Chapel Borough. Jefferson Hills Borough Name change Between 1950 & 1960, from Jefferson Township to Jefferson Borough. Jefferson Hills Borough Boundary change Year 1947, part of municipality was annexed to West Elizabeth Borough. Jefferson Hills Borough Boundary change Year 1947, part of municipality was incorporated as Pleasant Hills Borough. Jefferson Hills Borough Name change Year 1998, from Jefferson Borough to Jefferson Hills Borough. Kilbuck Township Boundary change Year 1940, part of municipality was annexed to Ben Avon Borough. Kilbuck Township Population revision Year 1970, from 1,720 to 1,694. Lincoln Borough Name change Between 1950 & 1960, from Lincoln Township to Lincoln Borough. McCandless, Town Of Population revision Year 1980, from 26,250 to 26,191.

7 Notation on boundary changes, name changes, and population revisions, by municipality in Allegheny County Municipal Name Type of Notation Notation McKeesport City Boundary change Between 1950 & 1960, municipal area increased by disincorporation of Eden Park Borough. McKeesport City Boundary change Year 1946, part of municipality was annexed from Versailles Borough. Monroeville, Municipality of Name change Between 1950 & 1960, from Patton Township to Monroeville Borough. Monroeville, Municipality of Name change Between 1980 & 1990, from Monroeville Borough to Municipality of Monroeville Borough. Monroeville, Municipality of Boundary change Year 1949, part of municipality was annexed to Turtle Creek Borough. Mount Lebanon Boundary change Between 1950 & 1960, part of municipality was annexed from Bethel Borough. Mount Lebanon Boundary change Between 1950 & 1960, part of municipality was annexed to Baldwin Township. Mount Lebanon Boundary change Between 1950 & 1960, part of municipality was annexed to Castle Shannon Borough. Mount Lebanon Boundary change Between 1950 & 1960, part of municipality was annexed to Scott Township. Mount Lebanon Boundary change Year 1945, part of municipality was annexed from Scott Township. Mount Lebanon Boundary change Year 1946, part of municipality was annexed from Scott Township. Mount Lebanon Boundary change Year 1947, part of municipality was annexed from Scott Township. Mount Lebanon Boundary change Year 1947, part of municipality was annexed to Castle Shannon Borough (two occurrences). Mount Lebanon Population revision Year 1970, from 39,596 to 39,157. Mount Oliver Borough Population revision Year 1970, from 5,487 to 5,509. Munhall Borough Population revision Year 1970, from 16,674 to 16,574. Munhall Borough Population revision Year 1980, from 14,532 to 14,535. North Braddock Borough Boundary change Year 1943, part of municipality was annexed from Forest Hills Borough. North Fayette Township Population revision Year 1970, from 6,148 to 5,626. Oakmont Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Plum Township. Oakmont Borough Boundary change Year 1949, part of municipality was annexed from Plum Township. O'Hara Township Boundary change Year 1944, part of municipality was annexed to Fox Chapel Borough. O'Hara Township Boundary change Year 1946, part of municipality was annexed to Sharpsburg Borough. O'Hara Township Boundary change Year 1947, part of municipality was annexed to Blawnox Borough. O'Hara Township Boundary change Year 1947, part of municipality was annexed to Fox Chapel Borough. O'Hara Township Boundary change Year 1948, part of municipality was annexed to Sharpsburg Borough. Penn Hills, Municipality of Name change Between 1950 & 1960, from Penn Township to Penn Hills Township. Penn Hills, Municipality of Boundary change Between 1960 & 1970, part of municipality annexed by Churchill Borough. Pennsbury Village Borough Boundary change Between 1970 & 1980, municipality was incorporated from part of Robinson Township. Pittsburgh City Boundary change Between 1950 & 1960, part of municipality was annexed from Baldwin Township. Pittsburgh City Boundary change Between 1950 & 1960, part of municipality was annexed from Robinson Township. Pittsburgh City Boundary change Year 1947, part of municipality was annexed from Baldwin Township. Pittsburgh City Boundary change Year 1948, part of municipality was annexed from Ross Township. Pittsburgh City Population revision Year 1970, from 520,117 to 520,089. Pittsburgh City Population revision Year 1980, from 423,938 to 423,959. Pleasant Hills Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Baldwin Township. Pleasant Hills Borough Boundary change Year 1947, municipality was incorporated from part of Jefferson Township. Pleasant Hills Borough Population revision Year 1980, from 9,676 to 9,604. Plum Borough Name change Between 1950 & 1960, from Plum Township to Plum Borough. Plum Borough Boundary change Between 1950 & 1960, part of municipality was annexed to Oakmont Borough.

8 Notation on boundary changes, name changes, and population revisions, by municipality in Allegheny County Municipal Name Type of Notation Notation Plum Borough Boundary change Year 1949, part of municipality was annexed to Oakmont Borough. Rankin Borough Population revision Year 1970, from 3,817 to 3,704. Robinson Township Boundary change Between 1950 & 1960, part of municipality was annexed to Carnegie Borough. Robinson Township Boundary change Between 1950 & 1960, part of municipality was annexed to Pittsburgh City. Robinson Township Boundary change Between 1970 & 1980, part of municipality was incorporated as Pennsbury Village Borough. Robinson Township Boundary change Year 1947, part of municipality was annexed to Rosslyn Farms Borough. Ross Township Boundary change Year 1948, part of municipality was annexed to Pittsburgh City. Rosslyn Farms Borough Boundary change Year 1947, part of municipality was annexed from Robinson Township. Scott Township Boundary change Between 1950 & 1960, part of municipality was annexed from Mount Lebanon Township. Scott Township Boundary change Year 1945, part of municipality was annexed to Mount Lebanon Township. Scott Township Boundary change Year 1946, part of municipality was annexed to Mount Lebanon Township. Scott Township Boundary change Year 1947, part of municipality was annexed to Mount Lebanon Township. Scott Township Boundary change Year 1948, part of municipality was annexed from Upper St Clair Township. Scott Township Boundary change Year 1948, part of municipality was annexed to Carnegie Borough. Sewickley Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Sewickley Heights Borough. Sewickley Heights Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Sewickley Hills Borough. Sewickley Heights Borough Boundary change Between 1950 & 1960, part of municipality was annexed to Sewickley Borough. Sewickley Hills Borough Name change Between 1950 & 1960, from Sewickley Heights Township to Sewickley Hills Borough. Sewickley Hills Borough Boundary change Between 1950 & 1960, part of municipality was annexed from Aleppo Township. Sewickley Hills Borough Boundary change Between 1950 & 1960, part of municipality was annexed to Sewickley Heights Borough. Sewickley Hills Borough Boundary change Between 1970 & 1980, municipality annexed area from and detached area to Franklin Park Borough. Shaler Township Boundary change Year 1941, part of municipality was annexed to Etna Borough. Sharpsburg Borough Boundary change Year 1946, part of municipality was annexed from O'Hara Township. Sharpsburg Borough Boundary change Year 1948, part of municipality was annexed from O'Hara Township. Sharpsburg Borough Population revision Year 1970, from 5,499 to 5,453. South Fayette Township Population revision Year 1960, from 9,494 to 10,728 (NOTE: difference should be added to reported county total). South Park Township Boundary change Between 1950 & 1960, part of municipality was annexed from Bethel Borough. South Park Township Boundary change Between 1950 & 1960, part of municipality was annexed to Bethel Borough. South Park Township Name change Between 1960 & 1970, from Snowden Township to South Park Township. Swissvale Borough Population revision Year 1970, from 13,821 to 13,819. Tarentum Borough Boundary change Year 1947, part of municipality was annexed from Frazer Township. Trafford Borough (part) Boundary change Between 1980 & 1990, the municipality annexed part of the Westmoreland County portion of Trafford Borough. Trafford Borough (part) Population revision Year 1980, from 0 to 110. Turtle Creek Borough Boundary change Year 1949, part of municipality was annexed from Patton Township. Upper St Clair Township Boundary change Between 1950 & 1960, part of municipality was annexed to Bridgeville Borough. Upper St Clair Township Boundary change Year 1948, part of municipality was annexed to Scott Township. Upper St Clair Township Boundary change Year 1949, part of municipality was annexed to Bridgeville Borough. Upper St Clair Township Population revision Year 1970, from 15,411 to 15,471. Versailles Borough Boundary change Year 1944, part of municipality was incorporated as Eden Park Borough. Versailles Borough Boundary change Year 1946, part of municipality was annexed to McKeesport City.

9 Notation on boundary changes, name changes, and population revisions, by municipality in Allegheny County Municipal Name Type of Notation Notation West Elizabeth Borough Boundary change Year 1947, part of municipality was annexed from Jefferson Township. West Mifflin Borough Name change Year 1942, from Mifflin Township to West Mifflin Borough. West Mifflin Borough Population revision Year 1980, from 26,279 to 26,322. Whitaker Borough Population revision Year 1970, from 1,697 to 1,797. Whitehall Borough Boundary change Between 1970 & 1980, municipality annexed part of Baldwin Borough. Whitehall Borough Boundary change Year 1947, municipality was incorporated from part of Baldwin Township & Bethel Township. Whitehall Borough Population revision Year 1970, from 16,551 to 16,450. Whitehall Borough Population revision Year 1980, from 15,206 to 15,143. Wilkins Township Boundary change Year 1943, part of municipality was annexed from Forest Hills Borough. Wilkinsburg Borough Boundary change Year 1942, part of municipality was annexed from Braddock Borough.

10 Data Sources Year(s) Population: Population revisions: 2000 Source 2010 Census Redistricting Data (Public Law ) Summary File for Pennsylvania released March 2011 Census 2000 Redistricting Data (Public Law ) Summary File Pennsylvania, prepared by the U.S. Census Bureau, 2001 (Pennsylvania file released March 2001) U.S. Bureau of the Census, 2000 Census of Population and Housing, Notes and Errata 2000, SF/01 ER, no dates are available on publication but as of July 2003 Population, population revisions, boundary changes, and name changes: 1970, 1980, , 1950 (most), 1960 (most) 1930, 1940 (some), 1950 (some) U.S. Bureau of the Census, 1990 Census of Population and Housing, Population and Housing Unit Counts, Pennsylvania, 1990 CPH 2 40, issued April 1993 U.S. Bureau of the Census, U.S. Census of Population: 1960, Volume I, Characteristics of the Population, Part 40, Pennsylvania, printed 1963 U.S. Bureau of the Census, U.S. Census of Population: 1950, Volume II, Characteristics of the Population, Part 38, Pennsylvania, printed 1952 Boundary changes and name changes: 2010 SPC documents 1960, 1970, 1980, 1990, and 2000 Pennsylvania State Data Center, Pennsylvania Decennial Census Population: , July 2001