Donald Sternoff Beyer Jr. is an American businessman, diplomat, and politician serving as the U.S. representative for Virginia's 8th congressional district since 2015. A member of the Democratic Party, his district is in the heart of Northern Virginia and includes Alexandria, Falls Church, and Arlington.

Virginia's 8th congressional district is located just across the Potomac River from Washington, D.C.. It comprises several populous suburbs in Northern Virginia, including all of Alexandria, Arlington, and Falls Church, as well as parts of Fairfax County. Democrat Don Beyer has held the seat since 2015. With a Cook Partisan Voting Index rating of D+26, it is the most Democratic district in Virginia.