Aspin met his wife, Maureen Shea, in Saigon during the Vietnam War. Shea, a graduate of Hollins College, was working for a research firm interviewing Vietcong defectors when the two were introduced by a mutual acquaintance. After the project was completed she moved to Wisconsin to work on Aspin's unsuccessful bid for Wisconsin State Treasurer in 1968. The couple became engaged in October 1968 and married in January 1969 in Shea's hometown of Hillsdale, New York. The couple divorced in 1979 and had no children.