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Registry data · 2026-09-14

Every Iowa county, counted: where the state's 17,803 contractors are

All 99 counties with published listings, from Polk County down — the complete geographic picture of Iowa's contractor registry.

Registrations issued or renewed per month · trailing 9 months

Every county with published listings, ranked by active registrations

01Polk County2,410 active
02Linn County1,072 active
03Johnson County550 active
04Scott County494 active
05Dallas County417 active
06Dubuque County407 active
07Black Hawk County401 active
08Warren County377 active
09Woodbury County363 active
10Story County354 active
11Pottawattamie County330 active
12Iowa County285 active
13Muscatine County163 active
14Sioux County162 active
15Webster County155 active
16Buchanan County149 active
17Marshall County148 active
18Jasper County146 active
19Clinton County145 active
20Cerro Gordo County138 active
21Washington County136 active
22Dickinson County129 active
23Boone County127 active
24Delaware County125 active
25Benton County124 active
26Madison County122 active
27Marion County121 active
28Jackson County110 active
29Wapello County110 active
30Des Moines County109 active
31Lee County108 active
32Carroll County105 active
33Clayton County101 active
34Plymouth County101 active
35Jones County99 active
36Clay County96 active
37Hardin County95 active
38Fayette County93 active
39Cedar County86 active
40Mahaska County85 active
41Winneshiek County85 active
42Poweshiek County84 active
43Bremer County83 active
44Guthrie County83 active
45Crawford County81 active
46Kossuth County78 active
47Tama County76 active
48Allamakee County71 active
49Buena Vista County68 active
50Cass County67 active
51Harrison County67 active
52Hamilton County66 active
53Mills County66 active
54Page County62 active
55Wayne County62 active
56Henry County60 active
57Butler County57 active
58Montgomery County54 active
59Lyon County53 active
60Shelby County53 active
61Cherokee County51 active
62Emmet County51 active
63Jefferson County50 active
64Lucas County50 active
65Obrien County50 active
66Union County49 active
67Davis County48 active
68Humboldt County48 active
69Greene County45 active
70Howard County45 active
71Appanoose County43 active
72Chickasaw County43 active
73Palo Alto County42 active
74Adair County41 active
75Sac County41 active
76Winnebago County41 active
77Mitchell County40 active
78Monona County38 active
79Wright County38 active
80Grundy County37 active
81Calhoun County36 active
82Decatur County36 active
83Keokuk County35 active
84Louisa County34 active
85Floyd County33 active
86Worth County32 active
87Franklin County31 active
88Hancock County31 active
89Fremont County29 active
90Clarke County28 active
91Van Buren County27 active
92Monroe County24 active
93Audubon County22 active
94Osceola County22 active
95Ringgold County22 active
96Taylor County21 active
97Ida County18 active
98Pocahontas County16 active
99Adams County14 active

Reporting on Iowa construction? These numbers are free to cite with a link to this page or the directory. As of September 2026, this is the complete public picture of Iowa’s registered contractor population.