Steve Mariucci (born November 4, 1955) is a former National Football League coach, most recently for the Detroit Lions.
Mariucci was born and raised in Iron Mountain, Michigan, and was a three-time All-America (Division II) quarterback at Northern Michigan University (NMU) in Marquette. In 1975, he quarterbacked NMU to the NCAA Division II National Football Championship.
He began his coaching career at his alma mater (1978–79), and moved to Cal State Fullerton (1980–82) and Louisville (1983–84). Mariucci's first pro position was as a receivers coach for the USFL's Orlando Renegades in 1985. Later that fall, he had a brief stint with the Los Angeles Rams as quality control coach.