Jefferson 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 73,894 people, with a population density of about 180.23 persons per square mile.
The county spans a total land area of 410.00 square miles (1,062.00 square kilometers). The administrative center and county seat is Steubenville, which often serves as a hub for local governance and services. The largest city within the county by population is Steubenville.
Geographically, Jefferson County experiences varied elevations, with its highest point at Richmond 1,285 ft and its lowest point at Amsterdam 0 ft. The region operates in the UTC-5.