Warren County
Warren County is a county located in the southwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 242,337. Its county seat is Lebanon and largest city is Mason. The county is one of Ohio's most affluent, with the second highest median income of the state's 88 counties. The county was established on May 1, 1803, from Hamilton County; it is named for Dr. Joseph Warren, a hero of the Revolution who sent Paul Revere and the overlooked William Dawes on their famous rides and who died at the Battle of Bunker Hill. Warren County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.
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Cities and towns 13
- City of Franklin pop. 11,636
- City of Lebanon pop. 21,191
- City of Mason pop. 35,089
- City of Springboro pop. 19,263
- Village of Butlerville pop. 156
- Village of Carlisle pop. 5,569
- Village of Corwin pop. 494
- Village of Harveysburg pop. 554
- Village of Maineville pop. 1,441
- Village of Morrow pop. 2,097
- Village of Pleasant Plain pop. 131
- Village of South Lebanon pop. 6,541
- Village of Waynesville pop. 2,728
Townships 11
- Township of Clear Creek pop. 36,858
- Township of Deerfield pop. 41,439
- Township of Franklin pop. 31,944
- Township of Hamilton pop. 31,298
- Township of Harlan pop. 5,036
- Township of Massie pop. 1,198
- Township of Salem pop. 5,328
- Township of Turtlecreek pop. 18,084
- Township of Union pop. 6,399
- Township of Washington pop. 2,816
- Township of Wayne pop. 8,841
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 194520
- FIPS state
- 39
- FIPS county
- 165
- FIPS place
- 99165
- Census record name
- COUNTY OF WARREN
- Mailing address
- WARREN COUNTY AUDITOR, LEBANON 45036