Trumbull County, Ohio

county in Ohio, United States

Trumbull County is a county in the U.S. state of Ohio. 201,977 people lived there in the 2020 census.[1] The county seat is Warren, which developed industry along the Mahoning River.[2]

Trumbull County is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.


  1. "QuickFacts: Trumbull County, Ohio". United States Census Bureau. Retrieved August 18, 2023.
  2. "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.