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Jefferson County, IL
Population by Decades

Date Population Population
Change
Annual
% Change
1900 28,133--
1910 29,1119780.3
1920 28,480-631-0.2
1930 31,0342,5540.9
1940 34,3753,3411.0
1950 35,8921,5170.4
1960 32,315-3,577-1.0
1970 31,446-869-0.3
1980 36,5525,1061.5
1990 37,0204680.1
2000 40,0453,0250.8
Source: U.S. Bureau of Census

 
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