Damascus is a census-designated place and an unincorporated area in Montgomery County, Maryland, United States. In the early 20th century, there existed an incorporated municipality lasting a quarter century. It had a population of 17,224 as of the 2020 census. Damascus is located at the intersection of two major roads in upper Montgomery County: Ridge Road and Damascus Road.

Montgomery County is the most populous county in the U.S. state of Maryland. As of the 2020 census, the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat is Rockville and Germantown is the most populous place in the county. The county is adjoined to Washington, D.C., the nation's capital, and is part of the Washington metropolitan area and the Washington–Baltimore combined statistical area. Most of the county's residents live in Silver Spring, Bethesda, Germantown, and the incorporated cities of Rockville and Gaithersburg.