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Monongalia County West Virginia Last Updated: 09/07/2026 |
| Monongalia County is a county located in the U.S. state of West Virginia. As of the 2020 census, the population was 105,822, making it West Virginia's third-most populous county. Its county seat is Morgantown. Named Monongalia as it was the land of the Monongahela River, it was home to a few settlers and Native American Tribes of Delaware, Shawnees, and Iroquois. | |
| Monongalia County consists of 368.82 square miles and includes the following cities: Morgantown, Westover, Cheat Lake, Star City, Blacksville, Granville, Cassville, Brookhaven, Pentress. | |