Maps of Ohio counties are available from the Ohio Department of Transportation at their website, dot.state.ohio.us. Maps of counties are also available from Geology.com and MapofUS.org. Some online retailers, such as MapsofWorld.com, sell county maps as downloadable files.Continue Reading
Ohio, which is located in the Midwestern United States, is the seventh most populous state. Ohio's 88 cover the state's 40,860 square miles. The average population of Ohio's counties is 131,036, based on the 2010 census.
The average land area of a county in Ohio is 464 square miles. The largest county by area is Ashtabula County with 702.44 square miles, and the smallest is Lake County at 228.21 square miles.Learn more about Maps & Cartography