US Census Data

Largest by population in Iowa

Iowa counties and cities ranked by population.

This page ranks the counties and cities of Iowa by population — which have the most people, according to the US Census Bureau's American Community Survey 5-year estimates.

Among counties, Polk County leads at 497,441.

Among cities & places, Des Moines leads at 212,464.

Counties

#NamePopulation
1Polk County497,441
2Linn County229,463
3Scott County174,302
4Johnson County154,881
5Black Hawk County130,693
6Woodbury County105,760
7Dallas County104,136
8Dubuque County98,948
9Story County98,592
10Pottawattamie County93,407
11Warren County53,484
12Clinton County46,383
13Cerro Gordo County42,785
14Muscatine County42,735
15Marshall County39,971
16Des Moines County38,597
17Jasper County37,864
18Webster County36,848
19Sioux County35,984
20Wapello County35,265
21Marion County33,551
22Lee County33,175
23Boone County26,669
24Plymouth County25,699
25Benton County25,698
26Bremer County25,118
27Washington County22,539
28Mahaska County22,045
29Jones County20,799
30Buena Vista County20,684
31Carroll County20,677
32Buchanan County20,645
33Henry County20,228
34Winneshiek County19,972
35Jackson County19,429
36Fayette County19,393
37Poweshiek County18,582
38Cedar County18,427
39Dickinson County17,844
40Delaware County17,549
41Clayton County17,069
42Tama County16,982
43Madison County16,760
44Hardin County16,729
45Iowa County16,547
46Clay County16,446
47Crawford County16,289
48Jefferson County15,676
49Floyd County15,502
50Page County15,168
51Hamilton County14,893
52Harrison County14,645
53Kossuth County14,610
54Mills County14,563
55Butler County14,301
56O'Brien County14,103
57Allamakee County14,038
58Cass County13,115
59Wright County12,817
60Grundy County12,352
61Appanoose County12,242
62Lyon County12,087
63Union County12,038
64Chickasaw County11,868
65Shelby County11,757
66Cherokee County11,587
67Hancock County10,718
68Louisa County10,710
69Winnebago County10,648
70Guthrie County10,646
71Mitchell County10,548
72Montgomery County10,254
73Franklin County9,977
74Keokuk County9,964
75Calhoun County9,858
76Sac County9,759
77Clarke County9,690
78Humboldt County9,573
79Howard County9,459
80Emmet County9,316
81Davis County9,127
82Palo Alto County8,902
83Greene County8,722
84Lucas County8,685
85Monona County8,619
86Decatur County7,669
87Monroe County7,546
88Adair County7,471
89Worth County7,380
90Van Buren County7,236
91Pocahontas County7,040
92Ida County6,944
93Fremont County6,570
94Wayne County6,518
95Osceola County6,114
96Taylor County5,901
97Audubon County5,622
98Ringgold County4,664
99Adams County3,641

Cities & places

Top 100.
#NamePopulation
1Des Moines212,464
2Cedar Rapids136,859
3Davenport101,083
4Sioux City85,651
5Iowa City75,264
6Ankeny70,542
7West Des Moines69,893
8Waterloo66,947
9Ames66,112
10Council Bluffs62,564
11Dubuque59,271
12Urbandale46,026
13Marion41,690
14Cedar Falls40,662
15Bettendorf39,297
16Marshalltown27,491
17Mason City27,135
18Waukee26,974
19Ottumwa25,352
20Fort Dodge24,788
21Clinton24,425
22Johnston24,196
23Burlington23,800
24Muscatine23,567
25Coralville22,846
26North Liberty20,782
27Altoona20,592
28Clive18,776
29Indianola15,918
30Grimes15,810
31Newton15,696
32Norwalk13,610
33Boone12,445
34Oskaloosa11,492
35Spencer11,393
36Storm Lake11,275
37Pleasant Hill10,796
38Pella10,624
39Le Mars10,597
40Waverly10,446
41Carroll10,261
42Fort Madison10,221
43Keokuk9,748
44Grinnell9,527
45Fairfield9,438
46Mount Pleasant9,093
47Sioux Center8,335
48Denison8,247
49Bondurant8,061
50Perry7,928
51Webster City7,769
52Clear Lake7,603
53Decorah7,597
54Knoxville7,493
55Creston7,466
56Charles City7,321
57Washington7,314
58Hiawatha7,178
59Nevada6,952
60Atlantic6,773
61Eldridge6,743
62Orange City6,312
63Adel6,259
64Independence6,149
65Maquoketa6,105
66Asbury5,949
67Oelwein5,878
68Estherville5,865
69Polk City5,833
70Anamosa5,553
71Red Oak5,542
72DeWitt5,535
73Osceola5,495
74Spirit Lake5,469
75Algona5,414
76Sheldon5,386
77Winterset5,384
78Centerville5,377
79Clarinda5,366
80Tiffin5,271
81Windsor Heights5,171
82Cherokee5,157
83Manchester5,144
84Glenwood5,118
85Sergeant Bluff5,090
86Iowa Falls5,062
87Vinton4,948
88Shenandoah4,913
89Harlan4,896
90Humboldt4,761
91Le Claire4,718
92Camanche4,562
93Mount Vernon4,551
94Evansdale4,530
95Huxley4,440
96Dyersville4,357
97Hampton4,311
98Forest City4,280
99Chariton4,235
100Carlisle4,187

Nationwide

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Other rankings in Iowa

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