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 Arlington include: The Doors frontman Jim Morrison; Former vice president Al Gore; Confederate general Robert E. Lee; U.S. Army general George S. Patton, Jr.; astronaut John Glenn; actors Warren Beatty, Sandra Bullock, and Shirley MacLaine; journalist Katie Couric; musicians Roberta Flack and Zac Hanson; physician and social activist Patch Adams; and scientist Grace Hopper. Arlington County, Virginia Arlington County is a county in the Commonwealth of Virginia, often referred to simply as Arlington or Arlington, Virginia. In 2016, the county's population was estimated at 230,050, making it the sixth-largest county in Virginia, or the fourth-largest city if it were incorporated