Barnesville is a town in Montgomery County, Maryland, United States. It was incorporated in 1888. The population was 144 at the 2020 census. According to the United States Census Bureau, the town has a total area of 0.49 square miles (1.27 km2), all land. The Maryland General Assembly chartered the town of Barnesville in 1811 and named it in honor of its earliest settler, Williams Barnes.


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Services are offered for Residential in Ashton.