Find out about the list of all Ohio state counties in alphabetical order including their county seats, size, numbers.
The U.S state of Ohio has 88 counties, here's the full list in alphabetical order:
A
Adams County (OH)
Allen County (OH)
Ashland County (OH)
Ashtabula County (OH)
Athens County (OH)
Auglaize County (OH)
B
Belmont County (OH)
Brown County (OH)
Butler County (OH)
C
Carroll County (OH)
Champaign County (OH)
Clark County (OH)
Clermont County (OH)
Clinton County (OH)
Columbiana County (OH)
Coshocton County (OH)
Crawford County (OH)
Cuyahoga County (OH)
D
Darke County (OH)
Defiance County (OH)
Delaware County (OH)
E
Erie County (OH)
F
Fairfield County (OH)
Fayette County (OH)
Franklin County (OH)
Fulton County (OH)
G
Gallia County (OH)
Geauga County (OH)
Greene County (OH)
Guernsey County (OH)
H
Hamilton County (OH)
Hancock County (OH)
Hardin County (OH)
Harrison County (OH)
Henry County (OH)
Highland County (OH)
Hocking County (OH)
Holmes County (OH)
Huron County (OH)
J
Jackson County (OH)
Jefferson County (OH)
K
Knox County (OH)
L
Lake County (OH)
Lawrence County (OH)
Licking County (OH)
Logan County (OH)
Lorain County (OH)
Lucas County (OH)
M
Madison County (OH)
Mahoning County (OH)
Marion County (OH)
Medina County (OH)
Meigs County (OH)
Mercer County (OH)
Miami County (OH)
Monroe County (OH)
Montgomery County
Morgan County (OH)
Morrow County (OH)
Muskingum County (OH)
N
Noble County (OH)
O
Ottawa County (OH)
P
Paulding County (OH)
Perry County (OH)
Pickaway County (OH)
Pike County (OH)
Portage County (OH)
Preble County (OH)
Putnam County (OH)
R
Richland County (OH)
Ross County (OH)
S
Sandusky County (OH)
Scioto County (OH)
Seneca County (OH)
Shelby County (OH)
Stark County (OH)
Summit County (OH)
T
Trumbull County (OH)
Tuscarawas County (OH)
U
Union County (OH)
V
Van Wert County (OH)
Vinton County (OH)
W
Warren County (OH)
Washington County (OH)
Wayne County (OH)
Williams County (OH)
Wood County (OH)
Wyandot County (OH)
List of Ohio counties in printable and scannable format
A
Adams County (OH), Allen County (OH), Ashland County (OH), Ashtabula County (OH), Athens County (OH), Auglaize County (OH)
B
Belmont County (OH), Brown County (OH), Butler County (OH)
C
Carroll County (OH), Champaign County (OH), Clark County (OH),bClermont County (OH), Clinton County (OH), Columbiana County (OH), Coshocton County (OH), Crawford County (OH), Cuyahoga County (OH)
D
Darke County (OH), Defiance County (OH), Delaware County (OH)
E
Erie County (OH)
F
Fairfield County (OH), Fayette County (OH), Franklin County (OH), Fulton County (OH)
G
Gallia County (OH), Geauga County (OH), Greene County (OH), Guernsey County (OH)
H
Hamilton County (OH), Hancock County (OH), Hardin County (OH), Harrison County (OH), Henry County (OH), Highland County (OH), Hocking County (OH), Holmes County (OH), Huron County (OH)
J
Jackson County (OH), Jefferson County (OH)
K
Knox County (OH)
L
Lake County (OH), Lawrence County (OH), Licking County (OH), Logan County (OH), Lorain County (OH), Lucas County (OH)
M
Madison County (OH), Mahoning County (OH), Marion County (OH), Medina County (OH), Meigs County (OH), Mercer County (OH), Miami County (OH), Monroe County (OH), Montgomery County, Morgan County (OH), Morrow County (OH), Muskingum County (OH)
N
Noble County (OH)
O
Ottawa County (OH)
P
Paulding County (OH), Perry County (OH), Pickaway County (OH),bPike County (OH), Portage County (OH), Preble County (OH), Putnam County (OH)
R
Richland County (OH), Ross County (OH)
S
Sandusky County (OH), Scioto County (OH), Seneca County (OH), Shelby County (OH), Stark County (OH), Summit County (OH)
T
Trumbull County (OH), Tuscarawas County (OH)
U
Union County (OH)
V
Van Wert County (OH), Vinton County (OH)
W
Warren County (OH), Washington County (OH), Wayne County (OH), Williams County (OH), Wood County (OH), Wyandot County (OH)
List of Ohio counties and their county size
Adams County OH – 584 sq mi
Allen County OH – 407 sq mi
Ashland County OH – 423 sq mi
Ashtabula County OH – 702 sq mi
Athens County OH – 508 sq mi
Auglaize County OH – 402 sq mi
Belmont County OH – 537 sq mi
Brown County OH – 493 sq mi
Butler County OH – 470 sq mi
Carroll County OH – 399 sq mi
Champaign County OH – 429 sq mi
Clark County OH – 403 sq mi
Clermont County OH – 460 sq mi
Clinton County OH – 412 sq mi
Columbiana County OH – 535 sq mi
Coshocton County OH – 564 sq mi
Crawford County OH – 402 sq mi
Cuyahoga County OH – 457 sq mi
Darke County OH – 600 sq mi
Defiance County OH – 412 sq mi
Delaware County OH – 443 sq mi
Erie County OH – 626 sq mi
Fairfield County OH – 505 sq mi
Fayette County OH – 407 sq mi
Franklin County OH – 544 sq mi
Fulton County OH – 407 sq mi
Gallia County OH – 469 sq mi
Geauga County OH – 404 sq mi
Greene County OH – 414 sq mi
Guernsey County OH – 528 sq mi
Hamilton County OH – 407 sq mi
Hancock County OH – 534 sq mi
Hardin County OH – 471 sq mi
Harrison County OH – 403 sq mi
Henry County OH – 416 sq mi
Highland County OH – 553 sq mi
Hocking County OH – 421 sq mi
Holmes County OH – 423 sq mi
Huron County OH – 492 sq mi
Jackson County OH – 422 sq mi
Jefferson County OH – 411 sq mi
Knox County OH – 530 sq mi
Lake County OH – 228 sq mi
Lawrence County OH – 457 sq mi
Licking County OH – 687 sq mi
Logan County OH – 460 sq mi
Lorain County OH – 491 sq mi
Lucas County OH – 340 sq mi
Madison County OH – 466 sq mi
Mahoning County OH – 425 sq mi
Marion County OH – 404 sq mi
Medina County OH – 423 sq mi
Meigs County OH – 433 sq mi
Mercer County OH – 473 sq mi
Miami County OH – 407 sq mi
Monroe County OH – 457 sq mi
Montgomery County OH – 464 sq mi
Morgan County OH – 421 sq mi
Morrow County OH – 407 sq mi
Muskingum County OH – 673 sq mi
Noble County OH – 399 sq mi
Ottawa County OH – 255 sq mi
Paulding County OH – 416 sq mi
Perry County OH – 412 sq mi
Pickaway County OH – 502 sq mi
Pike County OH – 444 sq mi
Portage County OH – 504 sq mi
Preble County OH – 426 sq mi
Putnam County OH – 484 sq mi
Richland County OH – 497 sq mi
Ross County OH – 693 sq mi
Sandusky County OH – 416 sq mi
Scioto County OH – 611 sq mi
Seneca County OH – 554 sq mi
Shelby County OH – 408 sq mi
Stark County OH – 576 sq mi
Summit County OH – 420 sq mi
Trumbull County OH – 625 sq mi
Tuscarawas County OH – 567 sq mi
Union County OH – 436 sq mi
Van Wert County OH – 410 sq mi
Vinton County OH – 415 sq mi
Warren County OH – 407 sq mi
Washington County OH – 640 sq mi
Wayne County OH – 555 sq mi
Williams County – 423 sq mi
Wood County – 617 sq mi
List of all Ohio state counties and their county seats
Adams County OH — West Union
Allen County OH — Lima
Ashland County OH— Ashland
Ashtabula County OH— Jefferson
Athens County OH — Athens
Auglaize County OH — Wapakoneta
Belmont County OH — St. Clairsville
Brown County OH — Georgetown
Butler County OH — Hamilton
Carroll County OH — Carrollton
Champaign County OH — Urbana
Clark County OH — Springfield
Clermont County OH — Batavia
Clinton County OH — Wilmington
Columbiana County OH — Lisbon
Coshocton County OH — Coshocton
Crawford County OH — Bucyrus
Cuyahoga County OH — Cleveland
Darke County OH — Greenville
Defiance County OH — Defiance
Delaware County OH — Delaware
Erie County OH — Sandusky
Fairfield County OH — Lancaster
Fayette County OH — Washington Court House
Franklin County OH — Columbus
Fulton County OH — Wauseon
Gallia County OH — Gallipolis
Geauga County OH — Chardon
Greene County OH — Xenia
Guernsey County OH — Cambridge
Hamilton County OH — Cincinnati
Hancock County OH — Findlay
Hardin County OH — Kenton
Harrison County OH — Cadiz
Henry County — Napoleon
Highland County OH — Hillsboro
Hocking County OH — Logan
Holmes County OH — Millersburg
Huron County OH — Norwalk
Jackson County OH — Jackson
Jefferson County OH — Steubenville
Knox County OH — Mount Vernon
Lake County OH — Painesville
Lawrence County OH — Ironton
Licking County OH — Newark
Logan County OH — Bellefontaine
Lorain County OH — Elyria
Lucas County OH — Toledo
Madison County OH — London
Mahoning County OH — Youngstown
Marion County OH — Marion
Medina County OH — Medina
Meigs County OH — Pomeroy
Mercer County OH — Celina
Miami County OH — Troy
Monroe County OH — Woodsfield
Montgomery County OH — Dayton
Morgan County OH — McConnelsville
Morrow County OH — Mount Gilead
Muskingum County OH — Zanesville
Noble County OH — Caldwell
Ottawa County OH — Port Clinton
Paulding County OH — Paulding
Perry County OH — New Lexington
Pickaway County OH — Circleville
Pike County OH — Waverly
Portage County OH — Ravenna
Preble County OH — Eaton
Putnam County OH — Ottawa
Richland County OH — Mansfield
Ross County OH — Chillicothe
Sandusky County OH — Fremont
Scioto County OH — Portsmouth
Seneca County OH — Tiffin
Shelby County OH — Sidney
Stark County OH — Canton
Summit County OH — Akron
Trumbull County OH — Warren
Tuscarawas County OH — New Philadelphia
Union County OH — Marysville
Van Wert County OH — Van Wert
Vinton County OH — McArthur
Warren County OH — Lebanon
Washington County OH — Marietta
Wayne County OH — Wooster
Williams County OH — Bryan
Wood County OH — Bowling Green
Wyandot County OH — Upper Sandusky
List of Ohio counties by region
Northeast Ohio
Ashtabula County OH
Cuyahoga County OH
Geauga County OH
Lake County OH
Lorain County OH
Medina County OH
Portage County OH
Summit County OH
Stark County OH
Wayne County OH
Northwest Ohio
Defiance County OH
Erie County OH
Fulton County OH
Hancock County OH
Henry County OH
Huron County OH
Lucas County OH
Ottawa County OH
Paulding County OH
Putnam County OH
Sandusky County OH
Seneca County OH
Van Wert County OH
Williams County OH
Wood County OH
Central Ohio
Delaware County OH
Fairfield County OH
Franklin County OH
Knox County OH
Licking County OH
Madison County OH
Marion County OH
Morrow County OH
Pickaway County OH
Union County OH
Southwest Ohio
Butler County OH
Clermont County OH
Clinton County OH
Darke County OH
Greene County OH
Hamilton County OH
Miami County OH
Montgomery County OH
Preble
County OH
Warren County OH
Southeast Ohio (Appalachian Region)
Adams County OH
Athens County OH
Belmont County OH
Coshocton County OH
Gallia County OH
Guernsey County OH
Harrison County OH
Highland County OH
Hocking County OH
Jackson County OH
Jefferson County OH
Lawrence County OH
Meigs County OH
Monroe County OH
Morgan County OH
Muskingum County OH
Noble County OH
Perry County OH
Pike County OH
Ross County OH
Scioto County OH
Vinton County OH
Washington County OH