The U.S. State of Iowa currently has 31 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated seven combined statistical areas, nine metropolitan statistical areas, and 15 micropolitan statistical areas in Iowa.[1] As of 2023, the largest of these is the Des Moines-West Des Moines-Ames, IA CSA, comprising the area around Iowa's capital and largest city, Des Moines.

The 31 United States statistical areas and 99 counties of the State of Iowa[a]
Combined statistical area[1]2023 population (est.)[2]Core-based statistical area[1]2023 population (est.)[2]County2023 population (est.)[2]
Des Moines-West Des Moines-Ames, IA CSA917,964Des Moines-West Des Moines, IA MSA737,164Polk County, Iowa505,255
Dallas County, Iowa111,092
Warren County, Iowa55,205
Jasper County, Iowa37,919
Madison County, Iowa16,971
Guthrie County, Iowa10,722
Ames, IA MSA125,156Story County, Iowa98,566
Boone County, Iowa26,590
Pella, IA μSA33,770Marion County, Iowa33,770
Oskaloosa, IA μSA21,874Mahaska County, Iowa21,874
Cedar Rapids-Iowa City, IA CSA455,756Cedar Rapids, IA MSA275,668Linn County, Iowa228,972
Benton County, Iowa25,796
Jones County, Iowa20,900
Iowa City, IA MSA180,088Johnson County, Iowa157,528
Washington County, Iowa22,560
Davenport-Moline, IA-IL CSA467,817
262,646 (IA)		Davenport-Moline-Rock Island, IA-IL MSA379,441
174,270 (IA)		Scott County, Iowa174,270
Rock Island County, Illinois141,236
Henry County, Illinois48,448
Mercer County, Illinois15,487
Clinton, IA μSA46,158Clinton County, Iowa46,158
Muscatine, IA μSA42,218Muscatine County, Iowa42,218
noneWaterloo-Cedar Falls, IA MSA168,162Black Hawk County, Iowa130,471
Bremer County, Iowa25,307
Grundy County, Iowa12,384
Sioux City-Le Mars, IA-NE-SD CSA170,124
131,673 (IA)		Sioux City, IA-NE-SD MSA144,402
105,951 (IA)		Woodbury County, Iowa105,951
Dakota County, Nebraska21,268
Union County, South Dakota17,183
Le Mars, IA μSA25,722Plymouth County, Iowa25,722
Omaha-Fremont, NE-IA CSA1,021,156
122,482 (IA)		Omaha, NE-IA MSA983,969
122,482 (IA)		Douglas County, Nebraska589,540
Sarpy County, Nebraska199,886
Pottawattamie County, Iowa93,179
Cass County, Nebraska27,446
Saunders County, Nebraska23,463
Washington County, Nebraska21,152
Harrison County, Iowa14,670
Mills County, Iowa14,633
Fremont, NE μSA37,187Dodge County, Nebraska37,187
noneDubuque, IA MSA98,887Dubuque County, Iowa98,887
Burlington-Fort Madison, IA-IL CSA76,906
70,818 (IA)		Burlington, IA-IL μSA44,341
38,253 (IA)		Des Moines County, Iowa38,253
Henderson County, Illinois6,088
Fort Madison, IA μSA32,565Lee County, Iowa32,565
noneMason City, IA μSA49,703Cerro Gordo County, Iowa42,406
Worth County, Iowa7,297
Marshalltown, IA μSA40,014Marshall County, Iowa40,014
Fort Dodge, IA μSA36,485Webster County, Iowa36,485
Ottumwa, IA μSA35,166Wapello County, Iowa35,166
Spencer-Spirit Lake, IA CSA34,567Spirit Lake, IA μSA18,056Dickinson County, Iowa18,056
Spencer, IA μSA16,511Clay County, Iowa16,511
noneStorm Lake, IA μSA20,567Buena Vista County, Iowa20,567
Carroll, IA μSA20,522Carroll County, Iowa20,522
noneSioux County, Iowa36,246
Buchanan County, Iowa20,691
Winneshiek County, Iowa19,815
Henry County, Iowa19,547
Jackson County, Iowa19,342
Fayette County, Iowa19,210
Poweshiek County, Iowa18,453
Cedar County, Iowa18,302
Delaware County, Iowa17,600
Clayton County, Iowa16,969
Tama County, Iowa16,833
Hardin County, Iowa16,463
Iowa County, Iowa16,381
Crawford County, Iowa16,013
Jefferson County, Iowa15,440
Floyd County, Iowa15,326
Page County, Iowa15,014
Hamilton County, Iowa14,729
Kossuth County, Iowa14,396
Butler County, Iowa14,172
Allamakee County, Iowa14,074
O'Brien County, Iowa14,012
Cass County, Iowa13,130
Wright County, Iowa12,656
Lyon County, Iowa12,324
Appanoose County, Iowa12,119
Union County, Iowa11,906
Shelby County, Iowa11,806
Chickasaw County, Iowa11,658
Cherokee County, Iowa11,605
Hancock County, Iowa10,615
Winnebago County, Iowa10,571
Mitchell County, Iowa10,518
Louisa County, Iowa10,513
Montgomery County, Iowa10,139
Keokuk County, Iowa9,914
Franklin County, Iowa9,875
Calhoun County, Iowa9,763
Sac County, Iowa9,686
Clarke County, Iowa9,588
Humboldt County, Iowa9,500
Howard County, Iowa9,376
Emmet County, Iowa9,229
Davis County, Iowa9,169
Palo Alto County, Iowa8,810
Lucas County, Iowa8,747
Greene County, Iowa8,584
Monona County, Iowa8,493
Decatur County, Iowa7,665
Monroe County, Iowa7,504
Adair County, Iowa7,389
Van Buren County, Iowa7,266
Pocahontas County, Iowa6,976
Ida County, Iowa6,833
Wayne County, Iowa6,557
Fremont County, Iowa6,458
Osceola County, Iowa5,978
Taylor County, Iowa5,924
Audubon County, Iowa5,534
Ringgold County, Iowa4,642
Adams County, Iowa3,544
State of Iowa3,207,004
The 24 core-based statistical areas of the State of Iowa[b]
2023 rankCore-based statistical area[1]Population
2023 estimate[2]Change2020 Census[3]Change2010 Census[4]
Des Moines-West Des Moines, IA MSA
Cedar Rapids, IA MSA
Iowa City, IA MSA
Davenport-Moline-Rock Island, IA-IL MSA (IA)
Waterloo-Cedar Falls, IA MSA
Ames, IA MSA
Omaha, NE-IA MSA (IA)
Sioux City, IA-NE-SD MSA (IA)
Dubuque, IA MSA
Mason City, IA μSA
Clinton, IA μSA
Muscatine, IA μSA
Marshalltown, IA μSA
Burlington, IA-IL μSA (IA)
Fort Dodge, IA μSA
Ottumwa, IA μSA
Pella, IA μSA
Fort Madison, IA μSA
Le Mars, IA μSA
Oskaloosa, IA μSA
Storm Lake, IA μSA
Carroll, IA μSA
Spirit Lake, IA μSA
Spencer, IA μSA
Burlington, IA-IL μSA
Davenport-Moline-Rock Island, IA-IL MSA
Omaha, NE-IA MSA
Sioux City, IA-NE-SD MSA
The seven combined statistical areas of the State of Iowa[c]
2023 rankCombined statistical area[1]Population
2023 estimate[2]Change2020 Census[3]Change2010 Census[4]
Des Moines-West Des Moines-Ames, IA CSA
Cedar Rapids-Iowa City, IA CSA
Davenport-Moline, IA-IL CSA (IA)
Sioux City-Le Mars, IA-NE-SD CSA (IA)
Omaha-Fremont, NE-IA CSA (IA)
Burlington-Fort Madison, IA-IL CSA (IA)
Spencer-Spirit Lake, IA CSA
Burlington-Fort Madison, IA-IL CSA
Davenport-Moline, IA-IL CSA
Omaha-Fremont, NE-IA CSA
Sioux City-Le Mars, IA-NE-SD CSA

See also

Notes

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References

  1. ^ "0MB BULLETIN NO. 23-01". Office of Management and Budget. July 21, 2023. Retrieved October 23, 2023.
  2. ^ "County Population Totals and Components of Change: 2020-2023". United States Census Bureau, Population Division. March 2023. Retrieved May 21, 2024.
  3. ^ "PROFILE OF GENERAL POPULATION AND HOUSING CHARACTERISTICS.". U.S. Census Bureau. 2020. Retrieved May 21, 2024.
  4. ^ "Annual Estimates of the Resident Population for Counties: April 1, 2010 to July 1, 2019". U.S. Census Bureau. 2019. Retrieved May 21, 2024.