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Carroll County IAGenWeb Census |
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Carroll County IAGenWeb Census |
| Source: U. S. Bureau of the Census, Decennial Census |
| 2010: SF1, American FactFinder Table P1 |
| 1900-1990 Censuses: Population of Counties by Decennial Census: 1900 to 1990 Compiled and edited by Richard L. Forstall, Population Division U. S. Bureau of the Census |
| 1850-1890 Censuses: Eleventh Census of the United States - 1890, Table 4 |
| Prepared by State Library of Iowa, State Data Cente Program, 800-248-4483 |
| Carroll County information extracted by Lynn McCleary, July 7, 2020 |
| YEAR | RANK | POPULATION |
| 1850 | 81 | 0 |
| 1860 | 81 | 281 |
| 1870 | 80 | 2,451 |
| 1880 | 68 | 12,351 |
| 1890 | 38 | 18,828 |
| 1900 | 43 | 20,319 |
| 1910 | 38 | 20,117 |
| 1920 | 36 | 21,549 |
| 1930 | 33 | 22,326 |
| 1940 | 31 | 22,770 |
| 1950 | 28 | 23,065 |
| 1960 | 27 | 23,431 |
| 1970 | 27 | 22,912 |
| 1980 | 28 | 22,951 |
| 1990 | 29 | 21,423 |
| 2000 | 29 | 21,421 |
| 2010 | 32 | 20,816 |