Belmont County is a county located in the U.S. state of Ohio. As of the most recent data available, the county has a population of approximately 70,226 people, with a population density of about 130.77 persons per square mile.
The county spans a total land area of 537.00 square miles (1,391.00 square kilometers). The administrative center and county seat is , which often serves as a hub for local governance and services. The largest city within the county by population is Martins Ferry.
Geographically, Belmont County experiences varied elevations, with its highest point at Morristown 1,300 ft and its lowest point at Bridgeport 0 ft. The region operates in the UTC-5.