Ohio County Map
Ohio County Map Collection
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Ohio County Maps
Ohio is carved up into 88 counties, from the shores of Lake Erie to the hills of Appalachia.
PHYSICAL MAP
Ohio Topographic County Map
Our map covers the essentials with lots of reference information. You’ll see Ohio’s counties, all the major highways, city names, rivers/lakes, and how it’s all laid out here.
SATELLITE IMAGERY
Ohio Satellite County Map
Ohio’s a mix when you look from above. It has dense patches of forest, farmland, rivers, and cities in between. Our satellite map shows county boundaries and a real-world view from above.
OUTLINE MAP
Ohio Simple County Map
Ohio, simplified. Our map below shows county boundaries and names. No roads, no cities, just a clean breakdown of the state’s divisions.
Ohio Counties
In terms of population, Franklin County is the most populous. The main reason for this is because it’s home to Columbus, the state capital. As for the least populous, it’s Vinton County down in the southeast. It’s mostly forests and hills without as much development here.
Most Populous: Franklin County
Least Populous: Vinton County
Ashtabula County is the biggest in terms of land area. It stretches along Lake Erie next to Pennsylvania. The smallest is Lake County, ironically named since it has the least land. I just want to be clear it’s smallest when you exclude water such as the Lake Erie shoreline. Otherwise, Carroll County would be smallest.
Largest Area: Ashtabula County
Smallest Area: Lake County
Ohio started setting up counties in 1788, when it was still part of the Northwest Territory. There are some interesting county name origins in Ohio. For example, Defiance County is named after Fort Defiance, built way back in 1794. Then, there’s Auglaize County, which comes from a Native American word meaning “fallen timbers.”
Ohio County List
Here’s a complete list of Ohio’s counties, with key statistics for each:
| FIPS Code | Name | Land % | Water % | Total Area (sq mi) |
|---|---|---|---|---|
| 39-001 | Adams County | 99.6 | 0.4 | 586.2 |
| 39-003 | Allen County | 98.9 | 1.1 | 406.8 |
| 39-005 | Ashland County | 99.1 | 0.9 | 426.8 |
| 39-007 | Ashtabula County | 51.3 | 48.7 | 1,367.9 |
| 39-009 | Athens County | 99.1 | 0.9 | 508.4 |
| 39-011 | Auglaize County | 99.9 | 0.1 | 401.9 |
| 39-013 | Belmont County | 98.3 | 1.7 | 541.3 |
| 39-015 | Brown County | 99.3 | 0.7 | 493.4 |
| 39-017 | Butler County | 99.3 | 0.7 | 470.0 |
| 39-019 | Carroll County | 98.9 | 1.1 | 398.9 |
| 39-021 | Champaign County | 99.8 | 0.2 | 429.8 |
| 39-023 | Clark County | 98.6 | 1.4 | 402.5 |
| 39-025 | Clermont County | 98.3 | 1.7 | 459.8 |
| 39-027 | Clinton County | 99.1 | 0.9 | 412.3 |
| 39-029 | Columbiana County | 99.5 | 0.5 | 534.7 |
| 39-031 | Coshocton County | 99.4 | 0.6 | 567.5 |
| 39-033 | Crawford County | 99.8 | 0.2 | 402.7 |
| 39-035 | Cuyahoga County | 36.7 | 63.3 | 1,245.5 |
| 39-037 | Darke County | 99.7 | 0.3 | 599.7 |
| 39-039 | Defiance County | 99.3 | 0.7 | 414.2 |
| 39-041 | Delaware County | 96.9 | 3.1 | 457.3 |
| 39-043 | Erie County | 40.2 | 59.8 | 625.9 |
| 39-045 | Fairfield County | 99.2 | 0.8 | 508.6 |
| 39-047 | Fayette County | 99.8 | 0.2 | 407.0 |
| 39-049 | Franklin County | 97.9 | 2.1 | 543.6 |
| 39-051 | Fulton County | 99.6 | 0.4 | 407.2 |
| 39-053 | Gallia County | 99.0 | 1.0 | 471.2 |
| 39-055 | Geauga County | 98.0 | 2.0 | 408.3 |
| 39-057 | Greene County | 99.4 | 0.6 | 416.3 |
| 39-059 | Guernsey County | 98.9 | 1.1 | 528.3 |
| 39-061 | Hamilton County | 98.4 | 1.6 | 412.6 |
| 39-063 | Hancock County | 99.6 | 0.4 | 533.7 |
| 39-065 | Hardin County | 99.9 | 0.1 | 470.6 |
| 39-067 | Harrison County | 97.9 | 2.1 | 410.8 |
| 39-069 | Henry County | 99.1 | 0.9 | 419.7 |
| 39-071 | Highland County | 99.2 | 0.8 | 557.8 |
| 39-073 | Hocking County | 99.5 | 0.5 | 423.6 |
| 39-075 | Holmes County | 99.7 | 0.3 | 424.0 |
| 39-077 | Huron County | 99.3 | 0.7 | 494.8 |
| 39-079 | Jackson County | 99.7 | 0.3 | 421.5 |
| 39-081 | Jefferson County | 99.3 | 0.7 | 411.0 |
| 39-083 | Knox County | 99.2 | 0.8 | 529.6 |
| 39-085 | Lake County | 23.4 | 76.6 | 979.2 |
| 39-087 | Lawrence County | 99.1 | 0.9 | 457.3 |
| 39-089 | Licking County | 99.3 | 0.7 | 687.4 |
| 39-091 | Logan County | 98.2 | 1.8 | 466.8 |
| 39-093 | Lorain County | 53.2 | 46.8 | 923.4 |
| 39-095 | Lucas County | 57.2 | 42.8 | 595.8 |
| 39-097 | Madison County | 99.8 | 0.2 | 466.6 |
| 39-099 | Mahoning County | 96.8 | 3.2 | 425.2 |
| 39-101 | Marion County | 99.9 | 0.1 | 404.1 |
| 39-103 | Medina County | 99.6 | 0.4 | 423.0 |
| 39-105 | Meigs County | 99.3 | 0.7 | 433.0 |
| 39-107 | Mercer County | 97.7 | 2.3 | 473.4 |
| 39-109 | Miami County | 99.3 | 0.7 | 409.6 |
| 39-111 | Monroe County | 99.6 | 0.4 | 457.5 |
| 39-113 | Montgomery County | 99.4 | 0.6 | 464.4 |
| 39-115 | Morgan County | 98.7 | 1.3 | 421.8 |
| 39-117 | Morrow County | 99.7 | 0.3 | 407.2 |
| 39-119 | Muskingum County | 98.8 | 1.2 | 672.6 |
| 39-121 | Noble County | 98.4 | 1.6 | 404.6 |
| 39-123 | Ottawa County | 43.5 | 56.5 | 585.1 |
| 39-125 | Paulding County | 99.4 | 0.6 | 418.8 |
| 39-127 | Perry County | 98.9 | 1.1 | 412.5 |
| 39-129 | Pickaway County | 99.0 | 1.0 | 506.5 |
| 39-131 | Pike County | 99.2 | 0.8 | 444.0 |
| 39-133 | Portage County | 96.7 | 3.3 | 504.1 |
| 39-135 | Preble County | 99.5 | 0.5 | 426.6 |
| 39-137 | Putnam County | 99.6 | 0.4 | 484.3 |
| 39-139 | Richland County | 99.0 | 1.0 | 500.1 |
| 39-141 | Ross County | 99.4 | 0.6 | 693.0 |
| 39-143 | Sandusky County | 97.8 | 2.2 | 417.7 |
| 39-145 | Scioto County | 99.0 | 1.0 | 616.1 |
| 39-147 | Seneca County | 99.7 | 0.3 | 552.8 |
| 39-149 | Shelby County | 99.3 | 0.7 | 410.7 |
| 39-151 | Stark County | 99.1 | 0.9 | 580.6 |
| 39-153 | Summit County | 98.3 | 1.7 | 420.1 |
| 39-155 | Trumbull County | 97.1 | 2.9 | 636.6 |
| 39-157 | Tuscarawas County | 99.3 | 0.7 | 571.4 |
| 39-159 | Union County | 98.8 | 1.2 | 436.9 |
| 39-161 | Van Wert County | 99.7 | 0.3 | 410.4 |
| 39-163 | Vinton County | 99.4 | 0.6 | 415.0 |
| 39-165 | Warren County | 98.5 | 1.5 | 407.3 |
| 39-167 | Washington County | 98.7 | 1.3 | 640.0 |
| 39-169 | Wayne County | 99.7 | 0.3 | 556.8 |
| 39-171 | Williams County | 99.4 | 0.6 | 423.1 |
| 39-173 | Wood County | 99.5 | 0.5 | 620.5 |
| 39-175 | Wyandot County | 99.8 | 0.2 | 407.6 |
Source: United States Census Bureau