Trumbull County, Ohio

Trumbull County
Trumbull County Courthouse
Location within the U.S. state of Ohio
Ohio's location within the U.S.
Coordinates: 41°19′N 80°46′W / 41.32°N 80.76°W / 41.32; -80.76
Country United States
State Ohio
FoundedJuly 10, 1800
Named afterJonathan Trumbull
SeatWarren
Largest cityWarren
Area
  Total
637 sq mi (1,650 km2)
  Land618 sq mi (1,600 km2)
  Water18 sq mi (50 km2)  2.9%
Population
 (2020)
  Total
201,977
  Estimate 
(2024)
200,300
  Density324/sq mi (125/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district14th
Websitewww.co.trumbull.oh.us

Trumbull County is a county in the far northeast portion of the U.S. state of Ohio. As of the 2020 census, the population was 201,977. Its county seat and largest city is Warren, which developed industry along the Mahoning River. Trumbull County is part of the Youngstown–Warren, OH Metropolitan Statistical Area.