Ohio Counties Map

Ohio, known as the Buckeye State, sits at the crossroads of the Midwestern and Northeastern United States, offering a variety of urban landscapes, rural retreats, and industrial might.

From the shores of Lake Erie in the north to the rolling Appalachian Hills in the south, Ohio’s diverse geography is matched by its varied counties, each with its unique character and history.

Ohio (OH) on the US Map

The State of Ohio highlighted on the US map.
Ohio on the US map

There are 88 counties in Ohio, including populated urban centers in Cuyahoga and Franklin Counties as well as the serene, natural beauty of Vinton and Hocking Counties.

This post will explore the distinctive aspects of Ohio’s counties, highlighting their historical landmarks, natural wonders, and cultural vibrancy. We’ll start with a detailed Ohio Counties Map that shows the borders and major cities in each Ohio county.

Below is a map of the 88 counties of Ohio (you can click on the map to enlarge it and to see the major city in each county).

A map displays Ohio's counties, each with a unique color and name, along with neighboring states and Lake Erie.
Ohio counties map with cities

Interactive Map of Ohio Counties

Click on any of the counties on the map to see its population, economic data, time zone, and zip code (the data will appear below the map). Data is sourced from the US Census 2021.

List of the Counties of New Ohio:

CountyPopulationPer sq. kmLargest City
Adams County27,56418.23West Union
Allen County102,46298.28Lima
Ashland County52,65848.07Ashland
Ashtabula County97,86953.82Ashtabula
Athens County62,93348.25Athens
Auglaize County46,28244.52Wapakoneta
Belmont County67,07748.67Martins Ferry
Brown County43,69434.46Georgetown
Butler County387,830320.97Middletown
Carroll County26,86626.29Minerva
Champaign County38,67834.81Urbana
Clark County136,032132.34Springfield
Clermont County207,650177.16Loveland
Clinton County42,04639.72Wilmington
Columbiana County102,33174.28Salem
Coshocton County36,62125.07Coshocton
Crawford County41,93940.3Bucyrus
Cuyahoga County1,263,6671067.13Cleveland
Darke County51,83933.46Greenville
Defiance County38,32935.97Defiance
Delaware County211,121183.94Columbus
Erie County75,560116.1Sandusky
Fairfield County157,622120.66Columbus
Fayette County28,89727.46Washington Court House
Franklin County1,313,598952.6Columbus
Fulton County42,70940.67Wauseon
Gallia County29,36924.31Gallipolis
Geauga County95,40892.02Bainbridge
Greene County167,043155.95Kettering
Guernsey County38,54228.49Cambridge
Hamilton County826,790787.4Cincinnati
Hancock County75,13954.6Findlay
Hardin County30,73825.24Kenton
Harrison County14,62314.03Cadiz
Henry County27,61825.63Napoleon
Highland County43,16230.13Hillsboro
Hocking County28,18025.82Logan
Holmes County44,16640.35Millersburg
Huron County58,58345.95Norwalk
Jackson County32,53129.88Jackson
Jefferson County65,62062.08Steubenville
Knox County62,39945.85Mount Vernon
Lake County232,202391.04Mentor
Lawrence County58,57049.88Ironton
Licking County177,454100.4Newark
Logan County45,99738.73Bellefontaine
Lorain County311,737245.37Lorain
Lucas County431,212490.17Toledo
Madison County43,94736.43London
Mahoning County229,044214.91Youngstown
Marion County65,51562.64Marion
Medina County181,448166.23Brunswick
Meigs County22,36120.07Middleport
Mercer County42,15435.19Celina
Miami County107,899102.48Huber Heights
Monroe County13,51411.45Woodsfield
Montgomery County536,136448.69Dayton
Morgan County13,95512.94McConnelsville
Morrow County34,89233.17Galion
Muskingum County86,34650.17Zanesville
Noble County14,16613.74Caldwell
Ottawa County40,47961.36Port Clinton
Paulding County18,85817.48Paulding
Perry County35,43933.54New Lexington
Pickaway County58,45845.03Circleville
Pike County27,27123.92Waverly
Portage County161,897128.25Kent
Preble County41,02737.34Eaton
Putnam County34,39527.52Ottawa
Richland County124,50497.07Mansfield
Ross County77,20543.25Chillicothe
Sandusky County59,01355.81Fremont
Scioto County74,39247.08Portsmouth
Seneca County55,16638.65Tiffin
Shelby County48,30745.75Sidney
Stark County374,712251.5Canton
Summit County540,567505.61Akron
Trumbull County202,199126.31Youngstown
Tuscarawas County93,02563.3New Philadelphia
Union County61,76955.24Dublin
Van Wert County28,80827.19Van Wert
Vinton County12,85312.03McArthur
Warren County239,556230.41Middletown
Washington County59,94236.62Marietta
Wayne County116,85881.33Wooster
Williams County37,02633.98Bryan
Wood County131,93082.54Bowling Green
Wyandot County21,93320.81Upper Sandusky

Biggest Counties in Ohio by Population

Franklin County

The skyline of Columbus Ohio can be seen from across the Scioto River in Franklin County.
Columbus, Ohio and the Scioto River

Franklin County, established in 1803 and named after Benjamin Franklin, is the most populous county in Ohio. Its county seat, Columbus, serves not only as the state capital but also as a vibrant hub for education, culture, and politics. The county is home to Ohio State University, one of the largest universities in the United States.

The county also boasts a diverse cultural scene, with numerous museums, parks, and entertainment venues. Highlights include the Columbus Museum of Art, the Center of Science and Industry (COSI), and the Franklin Park Conservatory and Botanical Gardens, offering enriching experiences for all ages. The Short North Arts District, known for its eclectic mix of galleries, shops, and restaurants, epitomizes the area’s artistic vibrancy.

Franklin County’s economy is robust, with a strong presence in the education, healthcare, insurance, and technology sectors. It’s also home to the Columbus Zoo and Aquarium, one of the largest zoos in the United States.

Cuyahoga County

A white sign that reads, “Cleveland” stands next to the water with the Cleveland skyline in the background.
Cleveland, Ohio

Cuyahoga County, established in 1808, is centered around Cleveland, Ohio’s second-largest city. This county is known for its significant contribution to arts and culture, housing the Cleveland Museum of Art and the Rock and Roll Hall of Fame. Additionally, the Cleveland Orchestra, based at Severance Hall, is recognized as one of the finest in the world.

The county’s industrial heritage is closely tied to the Cuyahoga River, which famously caught fire in 1969, prompting environmental reforms. Today, the riverfront is revitalized, featuring the Flats East Bank, a lively district with dining, entertainment, and parks.

Cuyahoga County also offers extensive green spaces, including part of the Cuyahoga Valley National Park, providing residents and visitors with outdoor recreational opportunities such as hiking, biking, and wildlife observation. The county’s blend of urban development and natural beauty, alongside its cultural institutions, makes it a pivotal area within Ohio.

Hamilton County

The Cincinnati skyline stands next to the water on a clear day.
The John A. Roebling Suspension Bridge in Cincinnati, Ohio

Hamilton County, established in 1790, is located in southwestern Ohio and is home to Cincinnati, the county seat and third-largest city in the state. Cincinnati is recognized for its historic architecture, such as the John A. Roebling Suspension Bridge and the Carew Tower, and for cultural institutions like the Cincinnati Art Museum and the Cincinnati Zoo & Botanical Garden, one of the oldest zoos in the United States.

The county plays a significant role in professional sports, hosting the Cincinnati Reds, Major League Baseball’s oldest team, and the Cincinnati Bengals of the NFL. Educational opportunities abound, with the University of Cincinnati and Xavier University contributing to the area’s academic and research environment.

The Over-the-Rhine district, known for its well-preserved 19th-century architecture and vibrant arts scene, has undergone extensive revitalization, becoming a popular destination for dining and entertainment.

Summit County

Akron, Ohio can be seen from a distance under a partly cloudy sky.    
Akron, Ohio

Summit County, established in 1840, is situated in northeastern Ohio and includes Akron as its county seat. Akron, once known as the “Rubber Capital of the World,” has diversified its economy to include manufacturing, education, and healthcare sectors.

The University of Akron is a significant presence in the county, known for its research contributions and strong engineering programs. Summit County’s arts and culture scene is vibrant, with venues like the Akron Art Museum and the E.J. Thomas Performing Arts Hall providing a platform for the arts, music, and theater.

Additionally, the Stan Hywet Hall and Gardens, the former estate of F.A. Seiberling, co-founder of Goodyear Tire and Rubber Company, showcases early 20th-century luxury and craftsmanship, now open to the public as a museum and park.

Montgomery County

An aerial view of tall buildings lining a street in downtown Dayton, Ohio.
Dayton, Ohio

Montgomery County, established in 1803, is located in southwestern Ohio, with Dayton as its county seat. Dayton is known for its rich aviation history, notably as the home of the Wright brothers, who are credited with inventing and building the world’s first successful airplane. This heritage is celebrated at the National Museum of the United States Air Force, the oldest and largest military aviation museum in the world.

The county also features the Dayton Art Institute, an architecturally significant building housing a diverse collection spanning 5,000 years of art history. Dayton’s innovation legacy continues with Tech Town, a technology-based business campus fostering growth in the region’s tech industry.

Montgomery County’s Five Rivers MetroParks offers extensive outdoor recreational opportunities, including biking, hiking, and water sports across various parks and waterways. The region’s commitment to the arts, innovation, and outdoor activities contributes to its vibrant community life.

Smallest Counties in Ohio by Population

Vinton County

A green wooden bridge spans a stream in Vinton County, Ohio.
Mount Olive Covered Bridge in Vinton County

Vinton County, formed in 1850, is located in southeastern Ohio and is known for its expansive natural landscapes and outdoor recreation opportunities. As the least populous county in the state, it offers a serene and rural atmosphere. McArthur serves as the county seat, embodying the small-town charm characteristic of the area.

The county is a haven for nature lovers, with a significant portion of the Wayne National Forest located within its borders, providing miles of trails for hiking, biking, and ATV riding. Vinton County is also home to the Hocking Hills State Park, renowned for its stunning rock formations, waterfalls, and caves, attracting visitors from across the region.

Lake Hope State Park, nestled in the Zaleski State Forest, offers boating, fishing, and swimming, set against the backdrop of Ohio’s Appalachian hills. These natural attractions make Vinton County an excellent destination for those seeking outdoor adventure and tranquility.

Monroe County

A low-angle view of the Monroe County Courthouse and an American flag.
The Monroe County Courthouse in Woodsfield, Ohio

Monroe County, established in 1813, is situated in southeastern Ohio, along the picturesque banks of the Ohio River. This county is characterized by rolling hills, lush forests, and a strong sense of community among its residents. Woodsfield, the county seat, epitomizes the rural charm and historical richness of the region.

Monroe County’s natural beauty is highlighted by the Wayne National Forest, which covers a large portion of the county, offering outdoor enthusiasts a variety of activities such as hiking, camping, and horseback riding.

The county also plays host to several annual events that celebrate its cultural and natural heritage, including the Woodsfield Antique Tractor Pull and the Monroe County Fair, which bring together the community and visitors for entertainment and fellowship.

The county’s economy is primarily based on agriculture, forestry, and extraction industries, with a growing focus on tourism and recreation due to its scenic landscapes and recreational opportunities.

Morgan County

A street-level view of a sculpture and a large brick building in downtown McConnelsville.
Main Street in downtown McConnelsville, Ohio

Morgan County, established in 1817, is nestled in the Appalachian region of southeastern Ohio, with McConnelsville serving as its county seat. This picturesque county is known for its scenic landscapes, including rolling hills, lush forests, and the meandering Muskingum River that flows through the heart of McConnelsville, adding to the town’s historic charm.

A key attraction in Morgan County is Burr Oak State Park, offering a tranquil retreat with opportunities for hiking, fishing, and boating amidst the beauty of Ohio’s natural woodlands. The park surrounds Burr Oak Lake, providing picturesque views and a peaceful environment for outdoor enthusiasts.

The county’s history is preserved in landmarks such as the Twin City Opera House in McConnelsville, which still hosts performances and events, maintaining its place as a cultural centerpiece.

More Notable Ohio Counties

Lucas County

A low-angle view of the façade of the Lucas County Courthouse.
Lucas County Courthouse in Toledo, Ohio

Lucas County, established in 1835, is located in northwest Ohio with Toledo as its county seat. Toledo’s waterfront along the Maumee River reflects the city’s history as a significant port and its ongoing revitalization efforts. The Toledo Museum of Art, renowned for its extensive collection and the architecturally stunning Glass Pavilion, is a cultural highlight in the county.

The county is also known for the Imagination Station, a dynamic science museum that encourages learning through interactive exhibits, making it a favorite destination for families. Outdoor enthusiasts enjoy the Metroparks of Toledo, a system of natural parks offering a range of recreational activities, from hiking and biking to bird watching.

Lucas County’s strategic location along Lake Erie makes it a key player in commerce and industry, with a strong emphasis on manufacturing, healthcare, and education. The University of Toledo contributes significantly to the county’s educational landscape, providing a wide array of programs and research opportunities.

Lorain County

Water flows over small cliffs surrounded by green plants.
East Falls of the Black River in Lorain County

Lorain County, formed in 1822, is situated in northern Ohio along the shores of Lake Erie. Elyria serves as the county seat, offering a mix of suburban living and access to natural beauty, such as the Black River Reservation, part of the Lorain County Metro Parks, known for its hiking trails and waterfalls.

The city of Lorain, known as “The International City” due to its diverse population, boasts the Lorain Lighthouse, a historic beacon that symbolizes the city’s maritime heritage. The county’s waterfront provides opportunities for fishing, boating, and enjoying lakeside views, especially at Lakeview Park with its beach and rose garden.

Oberlin College, located in the town of Oberlin, is a notable institution within the county, recognized for its rigorous academic programs and history of progressive activism. The college’s presence has fostered a vibrant arts and cultural scene, including the Allen Memorial Art Museum.

Mahoning County

A large brick and wood mill stands next to a small river on a winter day.
Lanterman’s Mill in Youngstown, Ohio

Mahoning County is located in northeastern Ohio, with Youngstown as its county seat. Youngstown has a rich industrial heritage, once a major steel production center, and is now experiencing a cultural and economic revitalization. The city is home to the Youngstown Historical Center of Industry and Labor, which offers insights into the area’s steel industry history.

Mill Creek Park, one of the oldest and largest municipally owned parks in the U.S., is a highlight of the county, offering extensive recreational opportunities with its beautiful landscapes, hiking trails, and Fellows Riverside Gardens. The park is a significant natural asset in the urban setting of Youngstown.

The county also benefits from the presence of Youngstown State University, contributing to the educational and cultural vibrancy of the area. The university attracts students and faculty from across the country, adding to the diversity and dynamism of the community.

Lake County

Trees with green and golden leaves line small waterfalls in Ohio’s Lake County.
Paine Falls Park near Painesville, Ohio

Lake County, established in 1840, is located in northeastern Ohio along the shores of Lake Erie. The county seat, Painesville, embodies the region’s blend of historical charm and modern development. Lake County is celebrated for its natural beauty, particularly the Holden Arboretum in Kirtland, one of the largest arboretums and botanical gardens in the United States.

Mentor, a city within Lake County, is known for Headlands Beach State Park, which boasts one of the longest natural beaches in Ohio, attracting visitors for its sandy shores and recreational activities. The city also serves as a shopping and dining hub, with a variety of retail options and eateries.

Lake County’s proximity to Cleveland allows residents and visitors to enjoy a tranquil lakeside setting while being close to the amenities and cultural attractions of a major metropolitan area. The county’s parks and recreational facilities, including the Lake Metroparks system, provide ample opportunities for outdoor activities.

Fairfield County

Small shops line a street in Lancaster, Ohio
Lancaster, Ohio

Fairfield County, founded in 1800, is situated in central Ohio, blending suburban and rural landscapes. Lancaster, the county seat, offers a glimpse into the region’s history and heritage, with sites like the Ohio Glass Museum reflecting its significant glass-making industry. The county is also home to parts of the Hocking Hills area, known for its picturesque natural beauty, including caves, waterfalls, and trails.

The county’s commitment to arts and culture is evident in the Decorative Arts Center of Ohio, located in Lancaster, which hosts exhibits and workshops in a historic mansion. Fairfield County’s agricultural roots are celebrated at the Fairfield County Fair, one of the oldest in Ohio, showcasing local farming, crafts, and livestock.

Outdoor enthusiasts enjoy Fairfield County’s parks and green spaces, such as Alley Park and the Fairfield Heritage Trail, offering hiking, fishing, and educational programs.

More About Counties in Ohio: FAQs

Which is the richest county in Ohio?

Delaware County is often considered the richest county in Ohio due to its high median household income and quality of life.

Which is the most conservative county in Ohio?

Holmes County is known for being one of the most conservative counties in Ohio, reflecting its large Amish population and traditional values.

Which Ohio county has the youngest population?

Athens County has the youngest population in Ohio, largely due to the presence of Ohio University in the city of Athens.

Which county in Ohio has the largest Amish population?

Holmes County has the largest Amish population in Ohio, offering visitors a glimpse into a unique way of life.

What is the smallest county in Ohio by area?

Lake County is the smallest by area in Ohio, covering an area of 228 square miles (591 km2).

In which county is Ohio’s highest natural point located?

Ohio’s highest point, Campbell Hill, is located in Logan County. It has an elevation of 1,549 feet (472 m).

Image Sources and Copyright Information
  • Scenic View of Columbus, Ohio Skyline Along the Scioto River: © Sean Pavone/Shutterstock
  • Downtown Cleveland Skyline at Twilight with Iconic Sign: © f11photo/Shutterstock
  • Evening View of Cincinnati Skyline with the Historic John A. Roebling Suspension Bridge: © photo.ua/Shutterstock
  • Downtown Skyline of Akron, Ohio, USA on a Sunny Day: © Sean Pavone/Shutterstock
  • Aerial View of Downtown Dayton, Ohio with Prominent Buildings and Streets: © Grindstone Media Group/Shutterstock
  • Traditional Green Wooden Covered Bridge in a Rural Setting: © James W. Thompson/Shutterstock
  • Classic Red Brick Courthouse with Green Dome under Blue Sky: © Jnix/Shutterstock
  • Downtown Street View in McConnelsville, Ohio with Historic Buildings and Clear Blue Sky: © Tim Kiser/Wikimedia Commons | CC BY-SA 2.5 Generic
  • Exterior View of the Lucas County Courthouse with American Flag: © Paul Brady Photography/Shutterstock
  • Serene Waterfall at Cascade Park, East Falls of the Black River in Lorain County: © VIKVAD/Shutterstock
  • Autumnal View of Lanterman’s Mill and Waterfall in Mahoning County: © Linda Waldrop/Shutterstock
  • Scenic View of a Cascading Waterfall with a Bridge Overhead Surrounded by Autumn Foliage: © Mikhalis Makarov/Shutterstock
  • Quaint Downtown Street in Lancaster, Ohio on a Cloudy Day: © Eric Glenn/Shutterstock