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Blank map of Ohio by county

All 88 counties of Ohio, ready to print on Letter, Tabloid, A4 or A3, or to download as PNG and SVG. Free, no sign-up.

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Mapsfera · data US Census Bureau

Ohio on the map

Ohio has 88 counties, the 13th most of any state. The largest is Ashtabula, with 702 sq mi of land, and the smallest is Lake, with 229 sq mi: Ashtabula is about 3 times bigger.

The state capital, Columbus, is in Franklin County, home to 97% of its residents; the city also reaches into Delaware County and Fairfield County. The capital version marks it on the map.

Franklin County is the most populous, with 1,361,536 people in 2025, or 11% of the state. The least populous is Vinton, with 12,645. Since 2020, Union has grown the fastest (+17.0%) and Lawrence has lost the most (−4.3%).

What each county borders

Stark borders the most counties in the state: 8 (Carroll, Columbiana, Holmes, Mahoning, Portage, Summit, Tuscarawas, and Wayne).

27 counties touch another state. 9 border West Virginia: Athens, Belmont, Columbiana, Gallia, Jefferson, Lawrence, Meigs, Monroe and 1 more. 9 border Indiana: Butler, Darke, Defiance, Hamilton, Mercer, Paulding, Preble, Van Wert and 1 more. 6 border Kentucky: Adams, Brown, Clermont, Hamilton, Lawrence, and Scioto. 4 border Pennsylvania: Ashtabula, Columbiana, Mahoning, and Trumbull. 3 border Michigan: Fulton, Lucas, and Williams.

Only Ottawa borders Canada.

8 counties are on the shore of the Great Lakes: Ashtabula, Cuyahoga, Erie, Lake, Lorain, Lucas, Ottawa, and Sandusky. 55 counties are fully inland, with no coast and no border with another state or country.

Number key

Numbers follow alphabetical order, from 1 (Adams) to 88 (Wyandot). Area is land area, without lakes or sea, and population is the Census estimate for July 1, 2025; “Borders” counts neighboring counties in the same state.

Show the whole table (88 rows)

No.	County	Land area	Population (2025)	Borders
1	Adams	584 sq mi	27,865	4
2	Allen	403 sq mi	100,881	5
3	Ashland	423 sq mi	52,523	7
4	Ashtabula	702 sq mi	96,713	3
5	Athens	504 sq mi	63,197	6
6	Auglaize	401 sq mi	45,909	6
7	Belmont	532 sq mi	64,434	5
8	Brown	490 sq mi	44,397	4
9	Butler	467 sq mi	400,128	4
10	Carroll	395 sq mi	26,475	5
11	Champaign	429 sq mi	38,820	6
12	Clark	396 sq mi	135,340	5
13	Clermont	453 sq mi	216,977	4
14	Clinton	409 sq mi	42,301	6
15	Columbiana	532 sq mi	99,377	4
16	Coshocton	564 sq mi	37,188	6
17	Crawford	402 sq mi	41,896	6
18	Cuyahoga	457 sq mi	1,232,925	5
19	Darke	598 sq mi	51,520	5
20	Defiance	411 sq mi	38,292	4
21	Delaware	443 sq mi	242,032	6
22	Erie	251 sq mi	73,296	3
23	Fairfield	504 sq mi	169,752	5
24	Fayette	406 sq mi	28,552	6
25	Franklin	532 sq mi	1,361,536	6
26	Fulton	405 sq mi	41,853	3
27	Gallia	467 sq mi	29,072	4
28	Geauga	400 sq mi	95,676	5
29	Greene	414 sq mi	174,322	6
30	Guernsey	522 sq mi	38,379	6
31	Hamilton	405 sq mi	838,418	3
32	Hancock	531 sq mi	75,034	6
33	Hardin	470 sq mi	30,072	7
34	Harrison	402 sq mi	14,070	5
35	Henry	416 sq mi	27,598	6
36	Highland	553 sq mi	43,823	6
37	Hocking	421 sq mi	27,512	6
38	Holmes	423 sq mi	44,970	6
39	Huron	492 sq mi	58,250	7
40	Jackson	420 sq mi	32,817	6
41	Jefferson	408 sq mi	63,597	4
42	Knox	525 sq mi	64,002	7
43	Lake	229 sq mi	232,217	3
44	Lawrence	453 sq mi	55,710	3
45	Licking	682 sq mi	185,564	7
46	Logan	458 sq mi	46,302	5
47	Lorain	491 sq mi	323,219	5
48	Lucas	340 sq mi	423,347	4
49	Madison	467 sq mi	46,985	7
50	Mahoning	412 sq mi	224,706	4
51	Marion	404 sq mi	65,115	6
52	Medina	421 sq mi	185,025	5
53	Meigs	430 sq mi	21,587	3
54	Mercer	462 sq mi	42,737	4
55	Miami	407 sq mi	112,634	5
56	Monroe	456 sq mi	12,994	3
57	Montgomery	461 sq mi	539,598	7
58	Morgan	416 sq mi	13,626	5
59	Morrow	406 sq mi	36,305	5
60	Muskingum	665 sq mi	87,014	6
61	Noble	398 sq mi	14,276	6
62	Ottawa	255 sq mi	39,481	3
63	Paulding	416 sq mi	18,727	3
64	Perry	408 sq mi	35,918	6
65	Pickaway	501 sq mi	62,978	6
66	Pike	440 sq mi	27,061	5
67	Portage	487 sq mi	163,404	5
68	Preble	424 sq mi	40,664	3
69	Putnam	483 sq mi	34,380	6
70	Richland	495 sq mi	124,893	5
71	Ross	689 sq mi	76,429	7
72	Sandusky	408 sq mi	58,655	5
73	Scioto	610 sq mi	71,365	4
74	Seneca	551 sq mi	54,522	6
75	Shelby	408 sq mi	48,065	6
76	Stark	575 sq mi	373,771	8
77	Summit	413 sq mi	538,376	5
78	Trumbull	618 sq mi	198,972	4
79	Tuscarawas	568 sq mi	92,373	6
80	Union	432 sq mi	73,446	7
81	Van Wert	409 sq mi	29,013	5
82	Vinton	412 sq mi	12,645	6
83	Warren	401 sq mi	257,181	6
84	Washington	632 sq mi	58,389	4
85	Wayne	555 sq mi	116,758	5
86	Williams	421 sq mi	36,549	3
87	Wood	617 sq mi	134,176	6
88	Wyandot	407 sq mi	21,567	5

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Frequently asked questions

How many counties does Ohio have?

88 counties. That’s the 13th most of any state.

What is the largest county in Ohio?

Ashtabula, with 702 sq mi of land. The smallest is Lake, with 229 sq mi.

What is the most populous county in Ohio?

Franklin County, with an estimated 1,361,536 people in 2025, or 11% of the state.

What county is Columbus in?

The state capital, Columbus, is in Franklin County, home to 97% of its residents; the city also reaches into Delaware County and Fairfield County.

Which Ohio counties border Canada?

1 county: Ottawa.

Can I use it in class?

Yes, it’s free. Print it, copy it and hand it out as many times as you like. If you post it on a blog or a class website, credit “Mapsfera · data US Census Bureau”.

How do I print it on US Letter paper?

Choose Letter in “Paper size” and click “Download PDF”. In the print window, pick Letter paper and 100% scale (“Actual size”). For a bigger map, choose Tabloid (11 × 17 in) or A3.

What order are the numbers in?

Alphabetical, from 1 to the last one. That makes the key easy to follow when you grade, and it’s the same key the worksheet’s answer page uses.

Sources

Boundaries: U.S. Census Bureau, Cartographic Boundary Files 2025, counties at 1:500,000 (public domain)
Land and water area: U.S. Census Bureau (TIGER/Line and 2025 Gazetteer); population: Vintage 2025 estimates (July 1, 2025)
State capital: Natural Earth, Populated Places (public domain); which counties it spans, Census places
Neighbors, coastline and borders: calculated from those boundaries (and checked against the Census county adjacency file)