Arlington County, Virginia area. The county is situated in Northern Virginia on the southwestern bank of the Potomac River directly across from Washington, D.C., of which it was once a part. With a land area of , Arlington is the geographically smallest self-governing county in the U.S., and by reason of state law regarding population density, has no incorporated towns within its borders. Due to the county's proximity to downtown Washington, D.C., Arlington is home to many important installations for the capital region and U.S. government, including the Pentagon, Reagan National Airport, and Arlington National Cemetery. Many schools and universities have campuses in
Arlington County, Virginia In 2009, Republican Attorney General Bob McDonnell won Virginia by a 59% to 41% margin, but Arlington voted 66% to 34% for Democratic State Senator Creigh Deeds. Turnout was 42.78%. Arlington elects four members of the Virginia House of Delegates and two members of the Virginia State Senate. State Senators are elected for four-year terms, while Delegates are elected for two-year terms. In the Virginia State Senate, Arlington is split between the 30th and 31st districts, represented by Adam Ebbin and Barbara Favola, respectively. In the Virginia House of Delegates, Arlington is divided between the 45th, 47th, 48th, and 49th