About Aberdeen Proving Ground, Maryland
Coordinates: 39°28?24?N 76°08?27?W? / ?39.473451°N 76.140837°W? / 39.473451; -76.140837Aberdeen Proving Ground (APG) is a United States Army facility located near Aberdeen, Maryland, (in Harford County). Part of the facility is a census-designated place (CDP), which had a population of 3,116 at the 2000 census.