Iowa / Counties by Population

Iowa Counties by Population

The data is from the US Census. Below are 99 Iowa counties ranked 1 through 99. You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

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Rank County Population
1 Polk County 467,235
2 Linn County 220,008
3 Scott County 171,493
4 Johnson County 144,425
5 Black Hawk County 132,960
6 Woodbury County 102,397
7 Dubuque County 96,571
8 Story County 95,888
9 Pottawattamie County 93,287
10 Dallas County 80,864
11 Warren County 48,630
12 Clinton County 47,587
13 Cerro Gordo County 43,134
14 Muscatine County 42,923
15 Marshall County 40,476
16 Des Moines County 39,876
17 Webster County 36,945
18 Jasper County 36,789
19 Wapello County 35,321
20 Lee County 34,785
21 Sioux County 34,692
22 Marion County 33,127
23 Boone County 26,381
24 Benton County 25,646
25 Plymouth County 25,027
26 Bremer County 24,741
27 Mahaska County 22,301
28 Washington County 22,095
29 Buchanan County 21,101
30 Winneshiek County 20,575
31 Jones County 20,468
32 Carroll County 20,428
33 Buena Vista County 20,369
34 Fayette County 20,139
35 Henry County 19,865
36 Jackson County 19,409
37 Poweshiek County 18,428
38 Cedar County 18,368
39 Jefferson County 17,945
40 Clayton County 17,711
41 Delaware County 17,326
42 Hardin County 17,239
43 Tama County 17,236
44 Crawford County 17,131
45 Dickinson County 17,000
46 Clay County 16,387
47 Iowa County 16,231
48 Floyd County 15,904
49 Madison County 15,720
50 Page County 15,393
51 Hamilton County 15,201
52 Kossuth County 15,166
53 Mills County 14,933
54 Butler County 14,822
55 Harrison County 14,196
56 O'Brien County 13,944
57 Allamakee County 13,940
58 Cass County 13,327
59 Wright County 12,864
60 Appanoose County 12,547
61 Union County 12,497
62 Grundy County 12,354
63 Chickasaw County 12,140
64 Shelby County 11,772
65 Lyon County 11,745
66 Cherokee County 11,577
67 Louisa County 11,238
68 Hancock County 10,971
69 Guthrie County 10,664
70 Mitchell County 10,663
71 Winnebago County 10,545
72 Franklin County 10,326
73 Montgomery County 10,239
74 Keokuk County 10,223
75 Sac County 9,936
76 Calhoun County 9,814
77 Emmet County 9,661
78 Humboldt County 9,586
79 Howard County 9,321
80 Clarke County 9,267
81 Palo Alto County 9,110
82 Greene County 9,046
83 Monona County 8,865
84 Davis County 8,834
85 Lucas County 8,600
86 Decatur County 8,105
87 Monroe County 7,912
88 Worth County 7,502
89 Van Buren County 7,308
90 Adair County 7,192
91 Fremont County 6,985
92 Pocahontas County 6,972
93 Ida County 6,965
94 Wayne County 6,405
95 Taylor County 6,214
96 Osceola County 6,149
97 Audubon County 5,711
98 Ringgold County 4,986
99 Adams County 3,785

United States Census Bureau. B01001 SEX BY AGE, 2017 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 6 December 2018. http://www.census.gov/.

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