Quantico is a town in Prince William County, Virginia, United States, located approximately 35 miles southwest of Washington, D.C. . It is bordered by the Potomac River to the east and the Quantico Creek to the north. The population was 480 at the 2010 census. The town is adjacent to one of the largest U.S. Marine Corps bases, Marine Corps Base Quantico, which covers some 59,000 acres and is home to over 28,000 military, civilian, and contractor personnel. The base serves as headquarters for many training institutions, including the Marine Corps University, the FBI Academy, and the DEA Training Academy. The Quantico installation is also the site for other agencies including the Naval Criminal Investigative Service (NCIS) .

In summary, Quantico is a town in Virginia that is adjacent to a large U.S. Marine Corps base and is home to several training institutions, including the FBI Academy and the DEA Training Academy.