Marvin E. Aspen (born 1934) is a United States federal judge.
Born in Chicago, Illinois, Aspen received a B.S. from Northwestern University in 1956 and a J.D. from Northwestern University School of Law in 1958. He was a law clerk in the Court of Claims Section of the U.S. Department of Justice in Washington, D.C. in 1958. He was in the Illinois National Guard from 1958 to 1960, and was U.S. Air Force Reserve Airman from 1960 to 1964. He was also in private practice in Chicago from 1958 to 1959, and in 1971, serving in the interim as an assistant state's attorney of Cook County, Illinois from 1960 to 1963, and as an assistant corporation counsel for the City of Chicago's Head of Appeals and Review Division, from 1963 to 1971. He has been an adjunct professor of law at Northwestern University since 1969. He was a judge on the Circuit Court of Cook County, Illinois from 1971 to 1979.
On April 30, 1979, Aspen was nominated by President Jimmy Carter to a new seat on the United States District Court for the Northern District of Illinois created by 92 Stat. 1629. He was confirmed by the United States Senate on July 23, 1979, and received his commission on July 24, 1979. He served as chief judge from 1995 to 2002, assuming senior status on July 1, 2002.