Iowa is divided into 99 counties, each functioning as a key administrative region with its own local government. These counties serve as important units of governance, providing services such as law enforcement, public health, infrastructure maintenance, and local courts.

Interactive Map of All Iowa Counties

Click on any county below to explore more about it.

No.	County Name	Largest City	County Map & Zip Code
1	Adair	Greenfield	Adair County Map Link
2	Adams	Corning	Adams County Map Link
3	Allamakee	Waukon	Allamakee County Map Link
4	Appanoose	Centerville	Appanoose County Map Link
5	Audubon	Audubon	Audubon County Map Link
6	Benton	Vinton	Benton County Map Link
7	Black Hawk	Waterloo	Black Hawk County Map Link
8	Boone	Boone	Boone County Map Link
9	Bremer	Waverly	Bremer County Map Link
10	Buchanan	Independence	Buchanan County Map Link
11	Buena Vista	Storm Lake	Buena Vista County Map Link
12	Butler	Allison	Butler County Map Link
13	Calhoun	Rockwell City	Calhoun County Map Link
14	Carroll	Carroll	Carroll County Map Link
15	Cass	Atlantic	Cass County Map Link
16	Cedar	Tipton	Cedar County Map Link
17	Cerro Gordo	Mason City	Cerro Gordo County Map Link
18	Cherokee	Cherokee	Cherokee County Map Link
19	Chickasaw	New Hampton	Chickasaw County Map Link
20	Clarke	Osceola	Clarke County Map Link
21	Clay	Spencer	Clay County Map Link
22	Clayton	Elkader	Clayton County Map Link
23	Clinton	Clinton	Clinton County Map Link
24	Crawford	Denison	Crawford County Map Link
25	Dallas	Waukee	Dallas County Map Link
26	Davis	Bloomfield	Davis County Map Link
27	Decatur	Leon	Decatur County Map Link
28	Delaware	Manchester	Delaware County Map Link
29	Des Moines	Burlington	Des Moines County Map Link
30	Dickinson	Spirit Lake	Dickinson County Map Link
31	Dubuque	Dubuque	Dubuque County Map Link
32	Emmet	Estherville	Emmet County Map Link
33	Fayette	Oelwein	Fayette County Map Link
34	Floyd	Charles City	Floyd County Map Link
35	Franklin	Hampton	Franklin County Map Link
36	Fremont	Sidney	Fremont County Map Link
37	Greene	Jefferson	Greene County Map Link
38	Grundy	Grundy Center	Grundy County Map Link
39	Guthrie	Guthrie Center	Guthrie County Map Link
40	Hamilton	Webster City	Hamilton County Map Link
41	Hancock	Garner	Hancock County Map Link
42	Hardin	Eldora	Hardin County Map Link
43	Harrison	Logan	Harrison County Map Link
44	Henry	Mount Pleasant	Henry County Map Link
45	Howard	Cresco	Howard County Map Link
46	Humboldt	Humboldt	Humboldt County Map Link
47	Ida	Ida Grove	Ida County Map Link
48	Iowa	Marengo	Iowa County Map Link
49	Jackson	Maquoketa	Jackson County Map Link
50	Jasper	Newton	Jasper County Map Link
51	Jefferson	Fairfield	Jefferson County Map Link
52	Johnson	Iowa City	Johnson County Map Link
53	Jones	Anamosa	Jones County Map Link
54	Keokuk	Sigourney	Keokuk County Map Link
55	Kossuth	Algona	Kossuth County Map Link
56	Lee	Fort Madison	Lee County Map Link
57	Linn	Cedar Rapids	Linn County Map Link
58	Louisa	Wapello	Louisa County Map Link
59	Lucas	Chariton	Lucas County Map Link
60	Lyon	Rock Rapids	Lyon County Map Link
61	Madison	Winterset	Madison County Map Link
62	Mahaska	Oskaloosa	Mahaska County Map Link
63	Marion	Pella	Marion County Map Link
64	Marshall	Marshalltown	Marshall County Map Link
65	Mills	Glenwood	Mills County Map Link
66	Mitchell	Osage	Mitchell County Map Link
67	Monona	Onawa	Monona County Map Link
68	Monroe	Albia	Monroe County Map Link
69	Montgomery	Red Oak	Montgomery County Map Link
70	Muscatine	Muscatine	Muscatine County Map Link
71	O’Brien	Primghar	O’Brien County Map Link
72	Osceola	Sibley	Osceola County Map Link
73	Page	Clarinda	Page County Map Link
74	Palo Alto	Emmetsburg	Palo Alto County Map Link
75	Plymouth	Le Mars	Plymouth County Map Link
76	Pocahontas	Pocahontas	Pocahontas County Map Link
77	Polk	Des Moines	Polk County Map Link
78	Pottawattamie	Council Bluffs	Pottawattamie County Map Link
79	Poweshiek	Grinnell	Poweshiek County Map Link
80	Ringgold	Mount Ayr	Ringgold County Map Link
81	Sac	Sac City	Sac County Map Link
82	Scott	Davenport	Scott County Map Link
83	Shelby	Harlan	Shelby County Map Link
84	Sioux	Sioux Center	Sioux County Map Link
85	Story	Ames	Story County Map Link
86	Tama	Toledo	Tama County Map Link
87	Taylor	Bedford	Taylor County Map Link
88	Union	Creston	Union County Map Link
89	Van Buren	Keosauqua	Van Buren County Map Link
90	Wapello	Ottumwa	Wapello County Map Link
91	Warren	Indianola	Warren County Map Link
92	Washington	Washington	Washington County Map Link
93	Wayne	Corydon	Wayne County Map Link
94	Webster	Fort Dodge	Webster County Map Link
95	Winnebago	Forest City	Winnebago County Map Link
96	Winneshiek	Decorah	Winneshiek County Map Link
97	Woodbury	Sioux City	Woodbury County Map Link
98	Worth	Northwood	Worth County Map Link
99	Wright	Clarion	Wright County Map Link

Iowa County Map Download

You can download the Iowa County Map from below:

Frequently Asked Questions

The largest county in Iowa by land area is Kossuth County.

Land Area: Approximately 973 square miles (2,520 km²)
County Seat: Algona

Kossuth County is located in north-central Iowa and is known for its vast agricultural lands.

The smallest county in Iowa by land area is Dickinson County.

Land Area: Approximately 381 square miles (987 km²)
County Seat: Spirit Lake
Notable Feature: Home to the Iowa Great Lakes, including Spirit Lake and West Okoboji Lake, making it a popular recreational area.

Despite its small size, Dickinson County is one of the most visited counties in Iowa due to its tourism and lakefront attractions.

Iowa is divided into 99 counties, each with its own local government and administrative functions.

Source: Wikipedia, Census.gov