Alexandria City Jail (formally William G. Truesdale - Alexandria Adult Detention Center) is a jail facility at 2001 Mill Road, Alexandria, Virginia, serving several courts and police agencies in Northern Virginia, including the U.S. District Court for the Eastern District of Virginia, commonly called the Alexandria federal court.

This facility is not owned or operated by the Federal Bureau of Prisons (BOP); the facility has an agreement with the U.S. Marshals Service.

Defendants involved in federal criminal proceedings there are often housed in the jail, including (with approximate dates of incarceration):

38°47′52.5″N 77°3′52.7″W / 38.797917°N 77.064639°W / 38.797917; -77.064639