Mapleville is an unincorporated community and census-designated place in eastern Washington County, Maryland, United States. Its population was 243 as of the 2020 census.^[4] It is officially a part of the Hagerstown Metropolitan Area.

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Mapleville, Maryland
Unincorporated community
Boonsboro Pike, Mapleville
Mapleville Show map of Maryland Mapleville Show map of the United States
Coordinates: 39°32′09″N 77°38′46″W
Country	United States
State	Maryland
County	Washington
Area [1]
• Total	0.40 sq mi (1.04 km2)
• Land	0.40 sq mi (1.04 km2)
• Water	0.00 sq mi (0.00 km2)
Elevation [2]	650 ft (200 m)
Population  (2020)
• Total	243
• Density	602.98/sq mi (232.55/km2)
Time zone	UTC−5 (Eastern (EST))
• Summer (DST)	UTC−4 (EDT)
ZIP code	21713[3]
Area code(s)	301, 240
GNIS feature ID	2583652[2]

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Mapleville lies along MD Route 66, known locally as the Mapleville Road, north of Boonsboro and just south of the community of San Mar. Route 66 links the towns of Boonsboro and Smithsburg, and provides local residents with access to nearby U.S. Route 40 and Interstate 70, making the main road along which the community is settled well-traveled. Short Hill, a lesser arm of the Blue Ridge's South Mountain, lies directly to the east of Mapleville; Greenbrier State Park & Lake are located between the hill and the range's principal ridge.

According to the U.S. Census Bureau, the community has an area of 0.403 square miles (1.04 km²), all land.^[5]