Ranking of Iowa Counties By Natural Population Increase in 2020
Updated on January 26, 2024.
Based on the US Census Vintage data estimates, in 2020, the Natural Population Increase for Iowa was 6.21K. Among all Iowa counties, Iowa had the highest natural population increase (6.21K), followed by Polk County (2.56K), and Johnson County (884).
The chart below shows the top 10 counties, and the table below shows the ranking of all Iowa counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Iowa Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2020 Census.
See this for other years:
Ranking of Iowa Counties By Natural Population Increase in 2020
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| Rank | County | Natural Pop. Increase |
|---|---|---|
| 1 | Iowa | 6211 |
| 2 | Polk County | 2558 |
| 3 | Johnson County | 884 |
| 4 | Dallas County | 771 |
| 5 | Linn County | 753 |
| 6 | Scott County | 475 |
| 7 | Woodbury County | 453 |
| 8 | Black Hawk County | 312 |
| 9 | Story County | 262 |
| 10 | Sioux County | 237 |
| 11 | Dubuque County | 226 |
| 12 | Buena Vista County | 141 |
| 13 | Muscatine County | 120 |
| 14 | Warren County | 115 |
| 15 | Davis County | 74 |
| 16 | Buchanan County | 71 |
| 17 | Lyon County | 66 |
| 18 | Crawford County | 60 |
| 19 | Washington County | 59 |
| 20 | Plymouth County | 41 |
| 21 | Wapello County | 30 |
| 22 | Benton County | 25 |
| 22 | Bremer County | 25 |
| 23 | Madison County | 17 |
| 24 | Pottawattamie County | 16 |
| 25 | Marshall County | 14 |
| 25 | Worth County | 14 |
| 26 | Mahaska County | 13 |
| 27 | Decatur County | 12 |
| 27 | Tama County | 12 |
| 28 | Clarke County | 10 |
| 29 | Chickasaw County | 8 |
| 29 | Monroe County | 8 |
| 30 | Lucas County | 4 |
| 31 | Adair County | 2 |
| 31 | Mitchell County | 2 |
| 32 | Delaware County | -1 |
| 32 | Jasper County | -1 |
| 32 | Van Buren County | -1 |
| 33 | Hamilton County | -2 |
| 33 | Louisa County | -2 |
| 33 | Wayne County | -2 |
| 34 | Adams County | -3 |
| 35 | Taylor County | -4 |
| 36 | Clay County | -5 |
| 36 | Floyd County | -5 |
| 36 | Howard County | -5 |
| 36 | Kossuth County | -5 |
| 37 | Franklin County | -6 |
| 38 | Emmet County | -7 |
| 39 | Hancock County | -9 |
| 39 | Henry County | -9 |
| 39 | Keokuk County | -9 |
| 40 | Sac County | -11 |
| 40 | Winneshiek County | -11 |
| 41 | Osceola County | -12 |
| 41 | Shelby County | -12 |
| 42 | Clinton County | -13 |
| 42 | Grundy County | -13 |
| 42 | Webster County | -13 |
| 43 | Pocahontas County | -14 |
| 44 | Audubon County | -16 |
| 44 | Mills County | -16 |
| 44 | Wright County | -16 |
| 45 | Carroll County | -17 |
| 46 | Allamakee County | -18 |
| 46 | Union County | -18 |
| 47 | Humboldt County | -19 |
| 47 | Ringgold County | -19 |
| 48 | Greene County | -20 |
| 49 | O'Brien County | -21 |
| 50 | Cedar County | -23 |
| 51 | Palo Alto County | -25 |
| 52 | Appanoose County | -29 |
| 52 | Marion County | -29 |
| 53 | Des Moines County | -30 |
| 54 | Fayette County | -31 |
| 54 | Jackson County | -31 |
| 54 | Winnebago County | -31 |
| 55 | Fremont County | -32 |
| 55 | Guthrie County | -32 |
| 55 | Jones County | -32 |
| 56 | Harrison County | -33 |
| 57 | Clayton County | -34 |
| 57 | Dickinson County | -34 |
| 58 | Calhoun County | -39 |
| 59 | Butler County | -40 |
| 59 | Ida County | -40 |
| 60 | Montgomery County | -43 |
| 61 | Cass County | -48 |
| 62 | Jefferson County | -50 |
| 63 | Monona County | -55 |
| 64 | Boone County | -56 |
| 64 | Cherokee County | -56 |
| 65 | Poweshiek County | -60 |
| 66 | Hardin County | -74 |
| 67 | Page County | -75 |
| 68 | Cerro Gordo County | -79 |
| 69 | Lee County | -134 |