Born in Boonville, New York, Roszkowski was a Staff Sergeant in the United States Army Air Forces during World War II, from 1943 to 1945. He received a Bachelor of Science degree from the University of Illinois at Urbana–Champaign in 1949 and a Juris Doctor from the University of Illinois College of Law in 1954. He was in private practice in Rockford, Illinois from 1955 to 1977.^[1]

On July 19, 1977, Roszkowski was nominated by President Jimmy Carter to a seat on the United States District Court for the Northern District of Illinois vacated by Judge Richard Wellington McLaren. Roszkowski was confirmed by the United States Senate on October 7, 1977, and received his commission on October 11, 1977. He assumed senior status on January 9, 1991, serving in that capacity until his retirement, on January 31, 1998.^[1] The Stanley J. Roszkowski United States Courthouse in Rockford is named for him. He died in Rockford, on July 7, 2014.^[2]

• Stanley Julian Roszkowski at the Biographical Directory of Federal Judges, a publication of the Federal Judicial Center.