Colesville is a census-designated place and an unincorporated area in Montgomery County, Maryland, United States.

[4] According to the United States Census Bureau, the place has a total area of 9.2 square miles (24 km2), all land.

Colesville's generally accepted boundaries extend between the Northwest and Paint Branches of the Anacostia River.

Its northern and southern boundaries are not as well-defined, but are usually assumed to run from Springbrook High School in the south to Cloverly in the north.

In 1715, "Easy Purchase" was bought by James Beall Sr., who that year also patented "Drumeldry", a 225-acre (0.91 km2) tract from the Northwest Branch across Notley Road to Shannon Drive.

[5] In the 1790s, Peter Kemp built a saw and grist mill on Paint Branch where it is crossed by today's Randolph Road.

[10] The oldest standing house in Colesville is "Milimar" at 410 Randolph Road, which is in the National Register of Historic Places and was built around 1790.

[5] The New York Times reported[12] that President Franklin Pierce purchased a farm of 600 acres (2.4 km2) in Colesville in 1855.

It was one of sixteen schools for African Americans constructed in the county with financial assistance from the Julius Rosenwald Fund.

Vendors sold strawberries and ice cream, and volunteers organized carnival games for kids.

People of Greek, Filipino, Scottish, Scotch-Irish, Arab, Swedish, French, Central American, Nigerian, South American, Dutch, Jamaican, Salvadoran, Iranian, Pakistani, Norwegian and Cambodian descent each comprise 1% of the population.

The median income for a household (2016) in the immediate area (one mile radius of Randolph Rd & New Hampshire Ave is $135,397 (pop.