Iowa Citizen Population By County in 2013 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2013, the citizen population for Iowa was 2,977,585 and represented 97.23% of the total Iowa population.

Among all Iowa counties, Polk had the highest citizen population (415.66K), followed by Linn (210.06K), and Scott (164.29K).

In terms of percentages, Ida had the highest percentage of its population being citizens (99.93%), followed by Audubon (99.92%), and Adams (99.87%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

You may also be interested in:
Iowa Citizen Voting-age Population By County in 2013

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Iowa Citizen Population By County in 2013

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County	Citizen Population	% of County Population
Polk	415655	94.83
Linn	210060	98.42
Scott	164290	98.33
Black Hawk	127900	97.29
Johnson	125840	93.89
Woodbury	96745	94.70
Dubuque	93455	98.99
Pottawattamie	91165	98.07
Story	85280	93.97
Dallas	66785	96.06
Clinton	48560	99.32
Warren	46440	99.59
Cerro Gordo	43375	98.74
Muscatine	41235	96.34
Des Moines	40005	99.27
Webster	37020	98.39
Marshall	36765	90.11
Jasper	36485	99.39
Lee	35365	98.97
Wapello	33735	95.11
Marion	33050	99.19
Sioux	32410	95.18
Boone	26180	99.51
Benton	25795	99.33
Plymouth	24690	99.06
Bremer	24300	99.65
Mahaska	22270	99.29
Washington	21495	98.44
Buchanan	20875	99.62
Winneshiek	20770	98.72
Carroll	20700	99.86
Fayette	20695	99.40
Jones	20550	99.59
Henry	19755	97.85
Jackson	19680	99.72
Poweshiek	18495	98.35
Cedar	18330	99.35
Buena Vista	18075	88.82
Clayton	17835	99.14
Delaware	17570	99.46
Tama	17305	97.99
Hardin	17255	98.85
Dickinson	16735	99.50
Clay	16435	98.98
Iowa	16215	99.33
Floyd	16085	99.44
Page	15655	98.83
Madison	15515	99.42
Crawford	15505	90.12
Kossuth	15360	99.51
Jefferson	15355	91.40
Hamilton	15265	98.58
Mills	14925	99.60
Butler	14850	99.60
Harrison	14670	99.59
O'Brien	14025	98.42
Allamakee	13830	97.12
Cass	13730	99.53
Appanoose	12780	99.77
Wright	12575	96.07
Union	12460	99.32
Grundy	12385	99.76
Chickasaw	12245	98.91
Shelby	11975	99.05
Cherokee	11945	99.42
Lyon	11580	99.31
Hancock	11095	98.67
Louisa	10780	94.98
Guthrie	10750	99.12
Mitchell	10685	99.49
Montgomery	10520	99.01
Winnebago	10510	97.95
Keokuk	10400	99.71
Franklin	10185	95.86
Sac	10140	99.17
Calhoun	9925	99.75
Emmet	9725	95.91
Humboldt	9600	98.21
Howard	9540	99.79
Palo Alto	9245	98.88
Greene	9220	99.62
Monona	9150	99.35
Clarke	8910	95.70
Davis	8740	99.83
Lucas	8415	95.19
Decatur	8220	98.92
Monroe	7750	96.75
Adair	7545	99.41
Worth	7530	99.60
Van Buren	7500	99.80
Fremont	7260	99.59
Pocahontas	7170	98.97
Ida	7095	99.93
Wayne	6370	99.84
Osceola	6110	96.45
Taylor	6100	97.52
Audubon	5995	99.92
Ringgold	5085	99.61
Adams	3970	99.87