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Westmoreland County, PA
Population by Decades

Date Population Population
Change
Annual
% Change
1900 160,175--
1910 231,30471,1293.7
1920 273,56842,2641.7
1930 294,99521,4270.8
1940 303,4118,4160.3
1950 313,1799,7680.3
1960 352,62939,4501.2
1970 376,93524,3060.7
1980 392,29415,3590.4
1990 370,321-21,973-0.6
2000 369,993-3280.0
Source: U.S. Bureau of Census

 
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