Washington County, Maryland is included in the Hagerstown-Martinsburg, MD-WV Metropolitan Statistical Area, which is also included in the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. The closes states to Washington County is west Virginia, Pennsylvania, Virginia, and Tennessee. The western portions of the Province of Maryland (including present Washington County) were incorporated into Prince George's County in 1696. This original county included six current counties. The first to be created was Frederick, separated from Prince George's County in 1748. Following independence, the sovereign State of Maryland formed Washington County on September 6, 1776, by the division of Frederick County. At the same time, a portion
Maryland Maryland, with large communities existing in the suburbs of Washington, D.C. (particularly Montgomery County and Prince George's County) and the city of Baltimore. The Greater Washington area has the largest population of Ethiopians outside of Africa. The Ethiopian community of Greater DC was historically based in Washington D.C.'s Adams Morgan and Shaw neighborhoods, but as the community has grown, many Ethiopians have settled in Silver Spring. The Washington, D.C. metropolitan area is also home to large Eritrean and Somali communities. The top reported ancestries by Maryland residents are: German (15%), Irish (11%), English (8%), American (7%), Italian (6%), and Polish