Aberdeen Proving Ground (APG) (sometimes erroneously called Aberdeen Proving Grounds) is a U.S. Army facility located adjacent to Aberdeen, Harford County, Maryland, United States. Part of the facility is a census-designated place (CDP), which had a population of 3,116 at the 2000 census, and 2,093 as of the 2010 census.

There are 11 major commands among the tenant units, including

  • CCDC
  • ATEC
  • Edgewood Arsenal
  • Adelphi Laboratory Center
    • The Army Reserve Information Operations Command
    • Unified Cross Domain Services Management Office
    • HQ, U.S. Army Contracting Command (Army Contracting Command –APG, Adelphi Contracting Division)
    • U.S Army 93rd Signal Network - Network Enterprise Center
    • Logistics Readiness Center
    • U.S. Army Cyber Operation Group – 335th Signal Command
    • Blossom Point Research Facility