state record · population
Population of Iowa
Iowa had an estimated population of 3,241,488 on July 1, 2024, according to the Census Bureau's Population Estimates Program.
What stands out
Iowa had an estimated population of 3,241,488 on July 1, 2024, according to the Census Bureau's Population Estimates Program. Since July 2020 that is +1.6 % (50,347 people); since 2010 it is +6.3 %. Migration is the larger driver since 2020: net migration +41,343 against a natural change (births minus deaths) of +9,019. Among the 51 states in the United States, it ranks 32 by population. Values for 2010–2019 and 2020–2024 come from two estimate vintages benchmarked to different censuses; the 2019→2020 step is partly a rebasing.
Population and components of change
July 1 estimates; components per estimate year (July–June).
Largest counties in Iowa
By latest estimate, with change since July 2020. Each links to the county's own population record.
| County | Population | Since 2020 |
|---|---|---|
| Polk County | 516,185 | +4.7 % |
| Linn County | 231,762 | +0.6 % |
| Scott County | 175,601 | +0.6 % |
| Johnson County | 160,080 | +4.6 % |
| Black Hawk County | 132,348 | +1.0 % |
| Dallas County | 115,343 | +14.7 % |
| Woodbury County | 107,257 | +1.2 % |
| Story County | 102,498 | +3.9 % |
| Dubuque County | 99,242 | -0.1 % |
| Pottawattamie County | 93,529 | -0.1 % |
| Warren County | 56,343 | +7.1 % |
| Clinton County | 46,015 | -0.9 % |
| Cerro Gordo County | 42,493 | -1.2 % |
| Muscatine County | 42,132 | -2.4 % |
| Marshall County | 40,392 | +0.8 % |
| Des Moines County | 38,411 | -1.2 % |
| Jasper County | 38,107 | +0.8 % |
| Webster County | 36,909 | -0.2 % |
| Sioux County | 36,554 | +1.8 % |
| Wapello County | 35,681 | +1.0 % |
| Marion County | 34,048 | +1.9 % |
| Lee County | 32,376 | -3.4 % |
| Boone County | 26,729 | +0.1 % |
| Plymouth County | 25,825 | +0.5 % |
| Benton County | 25,799 | +1.0 % |
Largest cities and towns in Iowa
Incorporated places, latest estimate. The Census Bureau publishes totals only for places, no components.
| Place | Population | Since 2020 |
|---|---|---|
| Des Moines city | 213,096 | -0.3 % |
| Cedar Rapids city | 137,904 | +0.0 % |
| Davenport city | 100,938 | -0.7 % |
| Sioux City city | 86,875 | +1.2 % |
| Ankeny city | 76,727 | +11.9 % |
| Iowa City city | 76,710 | +2.4 % |
| West Des Moines city | 73,664 | +6.9 % |
| Ames city | 69,026 | +3.8 % |
| Waterloo city | 67,477 | +0.3 % |
| Council Bluffs city | 62,665 | -0.2 % |
| Dubuque city | 58,987 | -1.1 % |
| Urbandale city | 47,759 | +4.8 % |
| Marion city | 42,542 | +2.3 % |
| Cedar Falls city | 41,417 | +1.7 % |
| Bettendorf city | 40,281 | +2.9 % |
| Waukee city | 34,420 | +41.2 % |
| Marshalltown city | 27,886 | +1.1 % |
| Mason City city | 26,948 | -1.2 % |
| Ottumwa city | 25,648 | +0.7 % |
| Johnston city | 25,022 | +4.3 % |
| Fort Dodge city | 24,886 | +0.1 % |
| Clinton city | 24,118 | -1.3 % |
| Coralville city | 23,959 | +7.3 % |
| Burlington city | 23,637 | -1.4 % |
| Muscatine city | 23,298 | -1.9 % |
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