High Quality Content by WIKIPEDIA articles! Clinton is an unincorporated area and census-designated place (CDP) in Prince George`s County, Maryland, United States. Clinton was formerly known as Surrattsville until after the time of the American Civil War. The population of Clinton was 26,064 at the 2000 census. However, as of 2007, there is an estimate of 35,096. The postal code for Clinton is 20735. Clinton is historically known for its role in the American Civil War concerning the Abraham Lincoln assassination. Clinton is adjacent to Camp Springs, Rosaryville, also known as Melwood, and Andrews Air Force Base.