Belmont County
Also known as Belmont County, Ohio, Belmont County, OH
county in Ohio, United States
Key facts
- Country
- United States
- State
- Ohio
- Founded
- September 7, 1801 (created), November 7, 1801 (organized)
- Named after
- "beautiful mountain" in French
- Seat
- St. Clairsville
- Largest city
- Martins Ferry
- Total
- 541.27 sq mi (1,401.9 km )
- Land
- 532.13 sq mi (1,378.2 km )
- Water
- 9.14 sq mi (23.7 km ) 1.7%
- Estimate 2025
- 64,434
- Density
- 120/sq mi (46/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
~14 min read
Article
Belmont County is a county located in the eastern end of the U.S. state of Ohio. As of the 2020 United States census, the population was 66,497. Its county seat is St. Clairsville, while its largest city is Martins Ferry. The county was created on September 7, 1801, and organized on November 7, 1801. It takes its name from the French for "beautiful mountain".
Belmont County is part of the Wheeling metropolitan area.