Aberdeen is a city in Harford County, Maryland, United States. The population was 13,842 at the 2000 census. As with all Aberdeens outside Scotland, it was named after the original Aberdeen City by Scots emigrating from home. Aberdeen is part of the Baltimore-Towson Metropolitan Statistical Area (MSA), which is the 20th-largest United States metropolitan area. The nearest city to Aberdeen is Havre de Grace, Maryland, 4.8 miles (7.7 km) to the northeast.