List of Ohio county name etymologies in the context of "Lucas County, Ohio"

Cuyahoga County (/ˌkaɪ.əˈhɒɡə/ KY-ə-HOG-ə or /ˌkaɪ.əˈhoʊɡə/ KY-ə-HOH-gə, see Cuyahoga River § Pronunciation) is a large urban county located in the northeastern part of the U.S. state of Ohio. The county seat and most populous city is Cleveland. As of the 2020 census, its population was 1,264,817, making it the second-most populous county in the state.

Cuyahoga County is situated on the southern shore of Lake Erie, across the U.S.–Canada maritime border. The county is bisected by the Cuyahoga River, after which it was named. "Cuyahoga" is an Iroquoian word meaning "crooked river". It is the core county of the Cleveland, OH Metropolitan Statistical Area and Cleveland–Akron–Canton, OH Combined Statistical Area.

Muskingum County (/məˈskɪŋ(ɡ)əm/ mə-SKING-(g)əm) is a county located in the east-central portion of the U.S. state of Ohio. As of the 2020 census, the population was 86,410. Its county seat is Zanesville. Nearly bisected by the Muskingum River, the county name is based on a Delaware American Indian word translated as "town by the river" or "elk's eye". Muskingum County comprises the Zanesville, OH Micropolitan Statistical Area, which is also included in the Columbus-Marion-Zanesville, OH Combined Statistical Area. The Zanesville Micropolitan Statistical Area is the second-largest statistical area within the Combined Statistical Area, after the Columbus Metropolitan Statistical Area. The county also comprises the entire Zanesville media market.

Erie County is a county in the northern portion of the U.S. state of Ohio. As of the 2020 census, the population was 75,622. Its county seat and largest city is Sandusky. The county is named for the Erie tribe, whose name was their word for "wildcat". It was formed in 1838 from the northern third of Huron County and a portion of Sandusky County.

Erie County is included in the Sandusky, OH Metropolitan Statistical Area, which is also included in the Cleveland-Akron-Canton, OH Combined Statistical Area.

Hamilton County is located in the southwestern corner of the U.S. state of Ohio. As of the 2020 census, the population was 830,639, making it the third-most populous county in Ohio. The county seat and most populous city is Cincinnati. The county is named for the first Secretary of the Treasury, Alexander Hamilton.Hamilton County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area.