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Rural Land
Mercer County, IL
Population by Decades
Date
Population
Population
Change
Annual
% Change
1900
20,945
-
-
1910
19,723
-1,222
-0.6
1920
18,800
-923
-0.5
1930
16,641
-2,159
-1.2
1940
17,701
1,060
0.6
1950
17,374
-327
-0.2
1960
17,149
-225
-0.1
1970
17,294
145
0.1
1980
19,286
1,992
1.1
1990
17,290
-1,996
-1.1
2000
16,957
-333
-0.2
Source:
U.S. Bureau of Census
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