 barnesville is a town in montgomery county, maryland, united states. it was incorporated in 1888. the population was 172 at the 2010 census. ==geography== barnesville is located at  (39.221975, -77.377813). according to the united states census bureau, the town has a total area of , all of it land.{{cite web|title=us gazetteer files 2010|url=http://www.census.gov/geo/www/gazetteer/files/gaz_places_national.txt|publis
Towns_in_Maryland Towns_in_Montgomery_County,_Maryland