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Marion County, IL
Population by Decades

Date Population Population
Change
Annual
% Change
1900 30,446--
1910 35,0944,6481.4
1920 37,4972,4030.7
1930 35,635-1,862-0.5
1940 47,98912,3543.0
1950 41,700-6,289-1.4
1960 39,349-2,351-0.6
1970 38,986-363-0.1
1980 43,5234,5371.1
1990 41,561-1,962-0.5
2000 41,6911300.0
Source: U.S. Bureau of Census

 
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