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Plymouth County, IA
Population by Decades

Date Population Population
Change
Annual
% Change
1900 22,209--
1910 23,1299200.4
1920 23,5844550.2
1930 24,1595750.2
1940 23,502-657-0.3
1950 23,252-250-0.1
1960 23,9066540.3
1970 24,3124060.2
1980 24,7434310.2
1990 23,388-1,355-0.6
2000 24,8491,4610.6
Source: U.S. Bureau of Census

 
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