The U.S. Office of Management and Budget defines the area as the Washington–Arlington–Alexandria, DC–VA–MD–WV metropolitan statistical area, a metropolitan statistical area used for statistical p… See more

The U.S. Census Bureau divides the Washington metropolitan statistical area into three (formerly two) metropolitan divisions:
• Washington, DC–MD Metropolitan Division, co… See more

Founded in 1957, the Metropolitan Washington Council of Governments (MWCOG) is a regional organization of 21 Washington-area local governments, as well as area members of the Maryland and Virginia state … See more