Ranking of Iowa Counties By Natural Population Increase in 2015
Updated on January 26, 2024.
Based on the US Census Vintage data estimates, in 2015, the Natural Population Increase for Iowa was 9.95K. Among all Iowa counties, Iowa had the highest natural population increase (9.95K), followed by Polk County (3.44K), and Johnson County (1.16K).
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), 2015 Census.
See this for other years:
Ranking of Iowa Counties By Natural Population Increase in 2015
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| Rank | County | Natural Pop. Increase |
|---|---|---|
| 1 | Iowa | 9946 |
| 2 | Polk County | 3440 |
| 3 | Johnson County | 1160 |
| 4 | Linn County | 1117 |
| 5 | Dallas County | 834 |
| 6 | Scott County | 764 |
| 7 | Black Hawk County | 591 |
| 8 | Woodbury County | 553 |
| 9 | Story County | 389 |
| 10 | Pottawattamie County | 289 |
| 11 | Dubuque County | 285 |
| 12 | Sioux County | 258 |
| 13 | Warren County | 145 |
| 14 | Muscatine County | 123 |
| 15 | Buena Vista County | 105 |
| 16 | Benton County | 80 |
| 17 | Buchanan County | 71 |
| 18 | Washington County | 69 |
| 19 | Davis County | 68 |
| 19 | Mahaska County | 68 |
| 20 | Lyon County | 56 |
| 21 | Crawford County | 46 |
| 21 | Louisa County | 46 |
| 22 | Delaware County | 45 |
| 22 | Jefferson County | 45 |
| 23 | Plymouth County | 41 |
| 24 | Bremer County | 40 |
| 25 | Mills County | 38 |
| 26 | Jasper County | 35 |
| 27 | Carroll County | 28 |
| 28 | Clinton County | 26 |
| 28 | Henry County | 26 |
| 29 | Hamilton County | 25 |
| 30 | Howard County | 23 |
| 31 | Madison County | 22 |
| 32 | Clarke County | 21 |
| 33 | Allamakee County | 15 |
| 33 | Franklin County | 15 |
| 34 | Tama County | 14 |
| 35 | Jones County | 13 |
| 35 | Marion County | 13 |
| 36 | Decatur County | 12 |
| 36 | Taylor County | 12 |
| 37 | Osceola County | 10 |
| 38 | Clay County | 8 |
| 39 | Boone County | 7 |
| 39 | Marshall County | 7 |
| 40 | Hancock County | 4 |
| 41 | Webster County | 2 |
| 42 | Wright County | -1 |
| 43 | Cedar County | -2 |
| 43 | Wayne County | -2 |
| 44 | Floyd County | -3 |
| 45 | Ida County | -4 |
| 45 | Wapello County | -4 |
| 46 | Emmet County | -5 |
| 47 | Audubon County | -6 |
| 48 | Des Moines County | -7 |
| 48 | Lee County | -7 |
| 49 | Clayton County | -8 |
| 49 | Pocahontas County | -8 |
| 50 | Chickasaw County | -9 |
| 51 | Dickinson County | -10 |
| 52 | Greene County | -11 |
| 53 | Humboldt County | -13 |
| 53 | Van Buren County | -13 |
| 53 | Worth County | -13 |
| 54 | Winneshiek County | -14 |
| 55 | Keokuk County | -16 |
| 56 | Lucas County | -17 |
| 57 | Mitchell County | -19 |
| 58 | Grundy County | -20 |
| 59 | Adams County | -22 |
| 59 | Winnebago County | -22 |
| 60 | O'Brien County | -23 |
| 61 | Fremont County | -24 |
| 62 | Calhoun County | -25 |
| 62 | Palo Alto County | -25 |
| 63 | Ringgold County | -29 |
| 64 | Guthrie County | -31 |
| 65 | Butler County | -33 |
| 65 | Cherokee County | -33 |
| 65 | Kossuth County | -33 |
| 66 | Appanoose County | -34 |
| 66 | Monroe County | -34 |
| 66 | Shelby County | -34 |
| 66 | Union County | -34 |
| 67 | Jackson County | -36 |
| 67 | Montgomery County | -36 |
| 68 | Harrison County | -37 |
| 68 | Sac County | -37 |
| 69 | Hardin County | -39 |
| 70 | Monona County | -40 |
| 70 | Poweshiek County | -40 |
| 71 | Cerro Gordo County | -44 |
| 72 | Page County | -46 |
| 73 | Fayette County | -56 |
| 74 | Cass County | -59 |
| 75 | Adair County | -62 |