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Mahaska County, IA
Population by Decades

Date Population Population
Change
Annual
% Change
1900 34,273--
1910 29,860-4,413-1.4
1920 26,270-3,590-1.3
1930 25,804-466-0.2
1940 26,4856810.3
1950 24,672-1,813-0.7
1960 23,602-1,070-0.4
1970 22,177-1,425-0.6
1980 22,8676900.3
1990 21,522-1,345-0.6
2000 22,3358130.4
Source: U.S. Bureau of Census

 
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