Iowa Natural Population Increase By County in 2015

Updated on June 30, 2022.

According to the US Census Bureau estimates, in 2015, the natural population increase for Iowa was 9,946, and the top three counties that had the highest natural population increase were:

  1. Iowa: 9,946
  2. Polk: 3,440
  3. Johnson: 1,160

On the other hand, the top 3 counties that had the lowest natural population increase were:

  1. Adair: -62
  2. Cass: -59
  3. Fayette: -56

Use the interactive visualization and the table below to explore the natural population increase for each Iowa county in 2015.

Natural Population Increase refers to the number of births minuse the number of deaths.

See this for other years:
Iowa Natural Population Increase By County in 2015
Iowa Natural Population Increase By County in 2015
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County Natural Pop. Increase
Adair -62
Adams -22
Allamakee 15
Appanoose -34
Audubon -6
Benton 80
Black Hawk 591
Boone 7
Bremer 40
Buchanan 71
Buena Vista 105
Butler -33
Calhoun -25
Carroll 28
Cass -59
Cedar -2
Cerro Gordo -44
Cherokee -33
Chickasaw -9
Clarke 21
Clay 8
Clayton -8
Clinton 26
Crawford 46
Dallas 834
Davis 68
Decatur 12
Delaware 45
Des Moines -7
Dickinson -10
Dubuque 285
Emmet -5
Fayette -56
Floyd -3
Franklin 15
Fremont -24
Greene -11
Grundy -20
Guthrie -31
Hamilton 25
Hancock 4
Hardin -39
Harrison -37
Henry 26
Howard 23
Humboldt -13
Ida -4
Iowa 9946
Jackson -36
Jasper 35
Jefferson 45
Johnson 1160
Jones 13
Keokuk -16
Kossuth -33
Lee -7
Linn 1117
Louisa 46
Lucas -17
Lyon 56
Madison 22
Mahaska 68
Marion 13
Marshall 7
Mills 38
Mitchell -19
Monona -40
Monroe -34
Montgomery -36
Muscatine 123
O'Brien -23
Osceola 10
Page -46
Palo Alto -25
Plymouth 41
Pocahontas -8
Polk 3440
Pottawattamie 289
Poweshiek -40
Ringgold -29
Sac -37
Scott 764
Shelby -34
Sioux 258
Story 389
Tama 14
Taylor 12
Union -34
Van Buren -13
Wapello -4
Warren 145
Washington 69
Wayne -2
Webster 2
Winnebago -22
Winneshiek -14
Woodbury 553
Worth -13
Wright -1