Trumbull County, Ohio

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

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

 References 

Category:1800s establishments in the Northwest Territory
Category:1800 establishments in the United States
Category:Ohio counties