Irvington is a town in Lancaster County, Virginia, United States. The population was 673 at the 2000 census and it is located on a peninsula of land known as the Northern Neck. It is the name also of a historic district. The former Chesapeake Academy was located in Irvington. One of its graduates, Claybrook Cottingham, was later its assistant principal and subsequently in his long academic career the president of both Louisiana College in Pineville and Louisiana Tech University in Ruston.