Robert ("Bob") Lutz (born August 29, 1947, in Lancaster, Pennsylvania, USA) was a top amateur and professional tennis player of the 1960s and 1970s. He and his longtime partner Stan Smith were one of the best doubles teams of all time. Together they won many major titles all over the world. In 1972 Lutz was briefly the World No. 7 ranked male player in the world. Between 1967 and 1977 he was ranked among the top-10 American players 8 times, with his highest ranking being number 5 in both 1968 and 1970.

Lutz won nine singles titles, the most important being in Paris in 1978, and reached 15 other singles finals, including the Cincinnati in 1974. He also won 43 doubles titles, many with Stan Smith, and reached 30 other doubles finals. His doubles titles include the U.S. Open in 1980, 1978, 1974, and 1968, the Australian Open in 1970 and Cincinnati in 1969. In addition, he also played on 5 winning Davis Cup teams and had a 14-2 record playing doubles in Davis Cup ties. He was nominated for the ITF Tennis Hall of Fame thanks to these achievements.

Lutz, a University of Southern California graduate, was inducted into their Hall of Fame.