Decennial Census Population Counts for Counties
Source: | U.S. Census Bureau |
Units: | Number of residents |
Additonal data: | Download historical data series (1850-2020) in Excel |
View data for cities or states |
FIPS | Area Name | 1980 | 1990 | 2000 | 2010 | 2020 |
---|---|---|---|---|---|---|
19000 | State of Iowa | 2,913,808 | 2,776,755 | 2,926,324 | 3,046,355 | 3,190,369 |
19001 | Adair County | 9,509 | 8,409 | 8,243 | 7,682 | 7,496 |
19003 | Adams County | 5,731 | 4,866 | 4,482 | 4,029 | 3,704 |
19005 | Allamakee County | 15,108 | 13,855 | 14,675 | 14,330 | 14,061 |
19007 | Appanoose County | 15,511 | 13,743 | 13,721 | 12,887 | 12,317 |
19009 | Audubon County | 8,559 | 7,334 | 6,830 | 6,119 | 5,674 |
19011 | Benton County | 23,649 | 22,429 | 25,308 | 26,076 | 25,575 |
19013 | Black Hawk County | 137,961 | 123,798 | 128,012 | 131,090 | 131,144 |
19015 | Boone County | 26,184 | 25,186 | 26,224 | 26,306 | 26,715 |
19017 | Bremer County | 24,820 | 22,813 | 23,325 | 24,276 | 24,988 |
19019 | Buchanan County | 22,900 | 20,844 | 21,093 | 20,958 | 20,565 |
19021 | Buena Vista County | 20,774 | 19,965 | 20,411 | 20,260 | 20,823 |
19023 | Butler County | 17,668 | 15,731 | 15,305 | 14,867 | 14,334 |
19025 | Calhoun County | 13,542 | 11,508 | 11,115 | 9,670 | 9,927 |
19027 | Carroll County | 22,951 | 21,423 | 21,421 | 20,816 | 20,760 |
19029 | Cass County | 16,932 | 15,128 | 14,684 | 13,956 | 13,127 |
19031 | Cedar County | 18,635 | 17,381 | 18,187 | 18,499 | 18,505 |
19033 | Cerro Gordo County | 48,458 | 46,733 | 46,447 | 44,151 | 43,127 |
19035 | Cherokee County | 16,238 | 14,098 | 13,035 | 12,072 | 11,658 |
19037 | Chickasaw County | 15,437 | 13,295 | 13,095 | 12,439 | 12,012 |
19039 | Clarke County | 8,612 | 8,287 | 9,133 | 9,286 | 9,748 |
19041 | Clay County | 19,576 | 17,585 | 17,372 | 16,667 | 16,384 |
19043 | Clayton County | 21,098 | 19,054 | 18,678 | 18,129 | 17,043 |
19045 | Clinton County | 57,122 | 51,040 | 50,149 | 49,116 | 46,460 |
19047 | Crawford County | 18,935 | 16,775 | 16,942 | 17,096 | 16,525 |
19049 | Dallas County | 29,513 | 29,755 | 40,750 | 66,135 | 99,678 |
19051 | Davis County | 9,104 | 8,312 | 8,541 | 8,753 | 9,110 |
19053 | Decatur County | 9,794 | 8,338 | 8,689 | 8,457 | 7,645 |
19055 | Delaware County | 18,933 | 18,035 | 18,404 | 17,764 | 17,488 |
19057 | Des Moines County | 46,203 | 42,614 | 42,351 | 40,325 | 38,910 |
19059 | Dickinson County | 15,629 | 14,909 | 16,424 | 16,667 | 17,703 |
19061 | Dubuque County | 93,745 | 86,403 | 89,143 | 93,653 | 99,266 |
19063 | Emmet County | 13,336 | 11,569 | 11,027 | 10,302 | 9,388 |
19065 | Fayette County | 25,488 | 21,843 | 22,008 | 20,880 | 19,509 |
19067 | Floyd County | 19,597 | 17,058 | 16,900 | 16,303 | 15,627 |
19069 | Franklin County | 13,036 | 11,364 | 10,704 | 10,680 | 10,019 |
19071 | Fremont County | 9,401 | 8,226 | 8,010 | 7,441 | 6,605 |
19073 | Greene County | 12,119 | 10,045 | 10,366 | 9,336 | 8,771 |
19075 | Grundy County | 14,366 | 12,029 | 12,369 | 12,453 | 12,329 |
19077 | Guthrie County | 11,983 | 10,935 | 11,353 | 10,954 | 10,623 |
19079 | Hamilton County | 17,862 | 16,071 | 16,438 | 15,673 | 15,039 |
19081 | Hancock County | 13,833 | 12,638 | 12,100 | 11,341 | 10,795 |
19083 | Hardin County | 21,776 | 19,094 | 18,812 | 17,534 | 16,878 |
19085 | Harrison County | 16,348 | 14,730 | 15,666 | 14,928 | 14,582 |
19087 | Henry County | 18,890 | 19,226 | 20,336 | 20,145 | 20,482 |
19089 | Howard County | 11,114 | 9,809 | 9,932 | 9,566 | 9,469 |
19091 | Humboldt County | 12,246 | 10,756 | 10,381 | 9,815 | 9,597 |
19093 | Ida County | 8,908 | 8,365 | 7,837 | 7,089 | 7,005 |
19095 | Iowa County | 15,429 | 14,630 | 15,671 | 16,355 | 16,662 |
19097 | Jackson County | 22,503 | 19,950 | 20,296 | 19,848 | 19,485 |
19099 | Jasper County | 36,425 | 34,795 | 37,213 | 36,842 | 37,813 |
19101 | Jefferson County | 16,316 | 16,310 | 16,181 | 16,843 | 15,663 |
19103 | Johnson County | 81,717 | 96,119 | 111,006 | 130,882 | 152,854 |
19105 | Jones County | 20,401 | 19,444 | 20,221 | 20,638 | 20,646 |
19107 | Keokuk County | 12,921 | 11,624 | 11,400 | 10,511 | 10,033 |
19109 | Kossuth County | 21,891 | 18,591 | 17,163 | 15,543 | 14,828 |
19111 | Lee County | 43,106 | 38,687 | 38,052 | 35,862 | 33,555 |
19113 | Linn County | 169,775 | 168,767 | 191,701 | 211,226 | 230,299 |
19115 | Louisa County | 12,055 | 11,592 | 12,183 | 11,387 | 10,837 |
19117 | Lucas County | 10,313 | 9,070 | 9,422 | 8,898 | 8,634 |
19119 | Lyon County | 12,896 | 11,952 | 11,763 | 11,581 | 11,934 |
19121 | Madison County | 12,597 | 12,483 | 14,019 | 15,679 | 16,548 |
19123 | Mahaska County | 22,867 | 21,522 | 22,335 | 22,381 | 22,190 |
19125 | Marion County | 29,669 | 30,001 | 32,052 | 33,309 | 33,414 |
19127 | Marshall County | 41,652 | 38,276 | 39,311 | 40,648 | 40,105 |
19129 | Mills County | 13,406 | 13,202 | 14,547 | 15,059 | 14,484 |
19131 | Mitchell County | 12,329 | 10,928 | 10,874 | 10,776 | 10,565 |
19133 | Monona County | 11,692 | 10,034 | 10,020 | 9,243 | 8,751 |
19135 | Monroe County | 9,209 | 8,114 | 8,016 | 7,970 | 7,577 |
19137 | Montgomery County | 13,413 | 12,076 | 11,771 | 10,740 | 10,330 |
19139 | Muscatine County | 40,436 | 39,907 | 41,722 | 42,745 | 43,235 |
19141 | O'Brien County | 16,972 | 15,444 | 15,102 | 14,398 | 14,182 |
19143 | Osceola County | 8,371 | 7,267 | 7,003 | 6,462 | 6,192 |
19145 | Page County | 19,063 | 16,870 | 16,976 | 15,932 | 15,211 |
19147 | Palo Alto County | 12,721 | 10,669 | 10,147 | 9,421 | 8,996 |
19149 | Plymouth County | 24,743 | 23,388 | 24,849 | 24,986 | 25,698 |
19151 | Pocahontas County | 11,369 | 9,525 | 8,662 | 7,310 | 7,078 |
19153 | Polk County | 303,170 | 327,140 | 374,601 | 430,640 | 492,401 |
19155 | Pottawattamie County | 86,561 | 82,628 | 87,704 | 93,158 | 93,667 |
19157 | Poweshiek County | 19,306 | 19,033 | 18,815 | 18,914 | 18,662 |
19159 | Ringgold County | 6,112 | 5,420 | 5,469 | 5,131 | 4,663 |
19161 | Sac County | 14,118 | 12,324 | 11,529 | 10,350 | 9,814 |
19163 | Scott County | 160,022 | 150,979 | 158,668 | 165,224 | 174,669 |
19165 | Shelby County | 15,043 | 13,230 | 13,173 | 12,167 | 11,746 |
19167 | Sioux County | 30,813 | 29,903 | 31,589 | 33,704 | 35,872 |
19169 | Story County | 72,326 | 74,252 | 79,981 | 89,542 | 98,537 |
19171 | Tama County | 19,533 | 17,419 | 18,103 | 17,767 | 17,135 |
19173 | Taylor County | 8,353 | 7,114 | 6,958 | 6,317 | 5,896 |
19175 | Union County | 13,858 | 12,750 | 12,309 | 12,534 | 12,138 |
19177 | Van Buren County | 8,626 | 7,676 | 7,809 | 7,570 | 7,203 |
19179 | Wapello County | 40,241 | 35,687 | 36,051 | 35,625 | 35,437 |
19181 | Warren County | 34,878 | 36,033 | 40,671 | 46,225 | 52,403 |
19183 | Washington County | 20,141 | 19,612 | 20,670 | 21,704 | 22,565 |
19185 | Wayne County | 8,199 | 7,067 | 6,730 | 6,403 | 6,497 |
19187 | Webster County | 45,953 | 40,342 | 40,235 | 38,013 | 36,999 |
19189 | Winnebago County | 13,010 | 12,122 | 11,723 | 10,866 | 10,679 |
19191 | Winneshiek County | 21,876 | 20,847 | 21,310 | 21,056 | 20,070 |
19193 | Woodbury County | 100,884 | 98,276 | 103,877 | 102,172 | 105,941 |
19195 | Worth County | 9,075 | 7,991 | 7,909 | 7,598 | 7,443 |
19197 | Wright County | 16,319 | 14,269 | 14,334 | 13,229 | 12,943 |