Iowa Natural Population Increase By County in 2020

Updated on June 30, 2022.

According to the US Census Bureau estimates, in 2020, the natural population increase for Iowa was 6,211, and the top three counties that had the highest natural population increase were:

  1. Iowa: 6,211
  2. Polk: 2,558
  3. Johnson: 884

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

  1. Lee: -134
  2. Cerro Gordo: -79
  3. Page: -75

Use the interactive visualization and the table below to explore the natural population increase for each Iowa county in 2020.

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 2020
Iowa Natural Population Increase By County in 2020
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County Natural Pop. Increase
Adair 2
Adams -3
Allamakee -18
Appanoose -29
Audubon -16
Benton 25
Black Hawk 312
Boone -56
Bremer 25
Buchanan 71
Buena Vista 141
Butler -40
Calhoun -39
Carroll -17
Cass -48
Cedar -23
Cerro Gordo -79
Cherokee -56
Chickasaw 8
Clarke 10
Clay -5
Clayton -34
Clinton -13
Crawford 60
Dallas 771
Davis 74
Decatur 12
Delaware -1
Des Moines -30
Dickinson -34
Dubuque 226
Emmet -7
Fayette -31
Floyd -5
Franklin -6
Fremont -32
Greene -20
Grundy -13
Guthrie -32
Hamilton -2
Hancock -9
Hardin -74
Harrison -33
Henry -9
Howard -5
Humboldt -19
Ida -40
Iowa 6211
Jackson -31
Jasper -1
Jefferson -50
Johnson 884
Jones -32
Keokuk -9
Kossuth -5
Lee -134
Linn 753
Louisa -2
Lucas 4
Lyon 66
Madison 17
Mahaska 13
Marion -29
Marshall 14
Mills -16
Mitchell 2
Monona -55
Monroe 8
Montgomery -43
Muscatine 120
O'Brien -21
Osceola -12
Page -75
Palo Alto -25
Plymouth 41
Pocahontas -14
Polk 2558
Pottawattamie 16
Poweshiek -60
Ringgold -19
Sac -11
Scott 475
Shelby -12
Sioux 237
Story 262
Tama 12
Taylor -4
Union -18
Van Buren -1
Wapello 30
Warren 115
Washington 59
Wayne -2
Webster -13
Winnebago -31
Winneshiek -11
Woodbury 453
Worth 14
Wright -16