Population of Pittsburgh and Allegheny County over time

Graph of Pittsburgh and Allegheny Co. 1795-2000

Table of population figures for Pittsburgh and Allegheny County

Year
Pittsburgh & Allegheny City
Allegheny County
1790
376
 
1810
4768
 
1820
7248
 
1830
21,568
 
1840
21,515
 
1850
46,601
 
1860
78,000
179,000
1870
139,500
262,000
1880
235,000
356,000
1890
344,000
552,000
1900
451,500
775,000
1910
534,000
1,018,500
1920
588,500
1,186,000
1930
669,817
 
1940
671,659
 
1950
676,806
2,000,000
1960
604,332
2,000,000
1970
520,089
 
1980
423,959
1,450,195
1990
369,879
1,336,449

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