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Clayton County, IA
Population by Decades
Date
Population
Population
Change
Annual
% Change
1900
27,750
-
-
1910
25,576
-2,174
-0.8
1920
25,032
-544
-0.2
1930
24,559
-473
-0.2
1940
24,334
-225
-0.1
1950
22,522
-1,812
-0.8
1960
21,962
-560
-0.3
1970
20,606
-1,356
-0.6
1980
21,098
492
0.2
1990
19,054
-2,044
-1.0
2000
18,678
-376
-0.2
Source:
U.S. Bureau of Census
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