Ohio is divided into 88 counties, each with its own local government and unique character. Use this interactive map and advanced search tools to explore Ohio’s counties, major cities, towns, and ZIP codes with ease.

Interactive Map of All Ohio Counties

Click on any county below to explore more about it.

No.	County Name	Largest City	County Map & Zip Code
1	Adams	West Union	Adams County Map Link
2	Allen	Lima	Allen County Map Link
3	Ashland	Ashland	Ashland County Map Link
4	Ashtabula	Ashtabula	Ashtabula County Map Link
5	Athens	Athens	Athens County Map Link
6	Auglaize	Wapakoneta	Auglaize County Map Link
7	Belmont	St. Clairsville	Belmont County Map Link
8	Brown	Georgetown	Brown County Map Link
9	Butler	Hamilton	Butler County Map Link
10	Carroll	Carrollton	Carroll County Map Link
11	Champaign	Urbana	Champaign County Map Link
12	Clark	Springfield	Clark County Map Link
13	Clermont	Milford	Clermont County Map Link
14	Clinton	Wilmington	Clinton County Map Link
15	Columbiana	Salem	Columbiana County Map Link
16	Coshocton	Coshocton	Coshocton County Map Link
17	Crawford	Bucyrus	Crawford County Map Link
18	Cuyahoga	Cleveland	Cuyahoga County Map Link
19	Darke	Greenville	Darke County Map Link
20	Defiance	Defiance	Defiance County Map Link
21	Delaware	Delaware	Delaware County Map Link
22	Erie	Sandusky	Erie County Map Link
23	Fairfield	Lancaster	Fairfield County Map Link
24	Fayette	Washington Court House	Fayette County Map Link
25	Franklin	Columbus	Franklin County Map Link
26	Fulton	Wauseon	Fulton County Map Link
27	Gallia	Gallipolis	Gallia County Map Link
28	Geauga	Chardon	Geauga County Map Link
29	Greene	Beavercreek	Greene County Map Link
30	Guernsey	Cambridge	Guernsey County Map Link
31	Hamilton	Cincinnati	Hamilton County Map Link
32	Hancock	Findlay	Hancock County Map Link
33	Hardin	Kent	Hardin County Map Link
34	Harrison	Cadiz	Harrison County Map Link
35	Henry	Napoleon	Henry County Map Link
36	Highland	Hillsboro	Highland County Map Link
37	Hocking	Logan	Hocking County Map Link
38	Holmes	Millersburg	Holmes County Map Link
39	Huron	Norwalk	Huron County Map Link
40	Jackson	Jackson	Jackson County Map Link
41	Jefferson	Steubenville	Jefferson County Map Link
42	Knox	Mount Vernon	Knox County Map Link
43	Lake	Mentor	Lake County Map Link
44	Lawrence	Ironton	Lawrence County Map Link
45	Licking	Newark	Licking County Map Link
46	Logan	Bellefontaine	Logan County Map Link
47	Lorain	Lorain	Lorain County Map Link
48	Lucas	Toledo	Lucas County Map Link
49	Madison	London	Madison County Map Link
50	Mahoning	Youngstown	Mahoning County Map Link
51	Marion	Marion	Marion County Map Link
52	Medina	Medina	Medina County Map Link
53	Meigs	Pomeroy	Meigs County Map Link
54	Mercer	Celina	Mercer County Map Link
55	Miami	Troy	Miami County Map Link
56	Monroe	Woodsfield	Monroe County Map Link
57	Montgomery	Dayton	Montgomery County Map Link
58	Morgan	McConnelsville	Morgan County Map Link
59	Morrow	Mount Gilead	Morrow County Map Link
60	Muskingum	Zanesville	Muskingum County Map Link
61	Noble	Caldwell	Noble County Map Link
62	Ottawa	Port Clinton	Ottawa County Map Link
63	Paulding	Paulding	Paulding County Map Link
64	Perry	New Lexington	Perry County Map Link
65	Pickaway	Circleville	Pickaway County Map Link
66	Pike	Waverly	Pike County Map Link
67	Portage	Kent	Portage County Map Link
68	Preble	Eaton	Preble County Map Link
69	Putnam	Ottawa	Putnam County Map Link
70	Richland	Mansfield	Richland County Map Link
71	Ross	Chillicothe	Ross County Map Link
72	Sandusky	Fremont	Sandusky County Map Link
73	Scioto	Portsmouth	Scioto County Map Link
74	Seneca	Tiffin	Seneca County Map Link
75	Shelby	Sidney	Shelby County Map Link
76	Stark	Canton	Stark County Map Link
77	Summit	Akron	Summit County Map Link
78	Trumbull	Warren	Trumbull County Map Link
79	Tuscarawas	New Philadelphia	Tuscarawas County Map Link
80	Union	Marysville	Union County Map Link
81	Van Wert	Van Wert	Van Wert County Map Link
82	Vinton	McArthur	Vinton County Map Link
83	Warren	Mason	Warren County Map Link
84	Washington	Marietta	Washington County Map Link
85	Wayne	Wooster	Wayne County Map Link
86	Williams	Bryan	Williams County Map Link
87	Wood	Bowling Green	Wood County Map Link
88	Wyandot	Upper Sandusky	Wyandot County Map Link

Ohio County Map Download

You can download the Ohio County Map from below:

Frequently Asked Questions

The largest county in Ohio by land area is Ashtabula County.

County: Ashtabula County
Area: Approximately 702 square miles
Location: In the northeastern corner of Ohio, bordering Pennsylvania and Lake Erie

The smallest county in Ohio by land area is Lake County.

County: Lake County
Area: Approximately 228 square miles of land
Location: In northeastern Ohio, along the southern shore of Lake Erie

Ohio has a total of 88 counties.

Source: Wikipedia, Census.gov