Newington is a census-designated place (CDP) in affluent, suburban Fairfax County, Virginia, United States. The population was 12,943 at the 2010 census. The 2010 census showed a signicant decrease after half the population was split off to the newly created Newington Forest CDP.
While the ZIP code for Newington is 22122, this is only for delivery points within the post office itself. Homes and businesses in the CDP have Springfield or Lorton street addresses. The area is poised for a great challenge as the U.S. Army in 2006 announced controversial plans to relocate 16,000 personnel positions to the Fort Belvoir Proving Ground in the next few years as part of the Base Realignment and Closure program, despite already gridlocked traffic and inadequate public transportation services in the neighborhood.