Ranking of Iowa Counties By Population with Dutch Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 114.55K people in Iowa with Dutch ancestry. Among all Iowa counties, Sioux County had the highest population with Dutch ancestry (16.18K), followed by Polk County (14.83K), and Marion County (5.84K).

The chart and table below shows the top 10 counties with high number of people with Dutch ancestry.

You can see similar information for other states and for other ancestry groups in Iowa.

Data Source: US Census Bureau.
Ranking of Iowa Counties By Population with Dutch Ancestry in 2021
Sioux County
Polk County
Marion County
Jasper County
Linn County
Lyon County
Mahaska County
Woodbury County
Scott County
O'Brien County
Ranking of Iowa Counties By Population with Dutch Ancestry in 2021
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Rank County Population
1 Sioux County 16177
2 Polk County 14833
3 Marion County 5839
4 Jasper County 4858
5 Linn County 4486
6 Lyon County 3690
7 Mahaska County 3306
8 Woodbury County 3219
9 Scott County 3138
10 O'Brien County 3124
11 Johnson County 3037
12 Dallas County 2710
13 Story County 2699
14 Black Hawk County 2248
15 Warren County 1962
16 Plymouth County 1769
17 Clinton County 1735
18 Pottawattamie County 1622
19 Wapello County 1618
20 Dubuque County 1552
21 Poweshiek County 1500
22 Cerro Gordo County 1111
23 Boone County 1009
24 Osceola County 974
25 Dickinson County 966
26 Des Moines County 884
27 Marshall County 877
28 Muscatine County 771
29 Davis County 726
30 Butler County 674
31 Webster County 670
32 Washington County 634
33 Iowa County 614
34 Clay County 571
35 Benton County 564
36 Mills County 548
37 Madison County 513
38 Monroe County 510
39 Keokuk County 504
40 Cherokee County 501
41 Bremer County 475
41 Grundy County 475
42 Wayne County 473
43 Buchanan County 451
44 Henry County 436
45 Winnebago County 433
46 Jones County 424
47 Union County 419
48 Buena Vista County 416
49 Sac County 415
50 Jefferson County 391
51 Harrison County 387
52 Hardin County 381
53 Cass County 379
54 Lee County 377
55 Kossuth County 371
56 Appanoose County 358
57 Hancock County 354
58 Clarke County 352
59 Page County 329
60 Cedar County 315
61 Fayette County 308
62 Floyd County 304
62 Van Buren County 304
63 Guthrie County 279
64 Wright County 276
65 Lucas County 266
65 Tama County 266
66 Carroll County 260
67 Hamilton County 257
68 Monona County 245
69 Crawford County 244
69 Franklin County 244
70 Emmet County 240
71 Howard County 222
72 Delaware County 221
73 Palo Alto County 212
74 Mitchell County 207
75 Chickasaw County 201
76 Ida County 200
77 Greene County 193
78 Calhoun County 190
79 Decatur County 187
80 Adair County 166
81 Worth County 161
82 Clayton County 155
83 Montgomery County 153
84 Audubon County 142
85 Winneshiek County 139
86 Humboldt County 136
87 Allamakee County 131
88 Jackson County 129
89 Louisa County 126
90 Pocahontas County 117
91 Taylor County 113
92 Fremont County 110
93 Ringgold County 108
94 Shelby County 94
95 Adams County 86