Pietro Marzano (born 29 August 1949) is a former professional tennis player from Italy who was active in the 1960s and 1970s.

His best singles result at a Grand Slam tournament was reaching the third round at the French Open in 1969 in which he lost in straight sets to first-seeded and eventual champion Rod Laver.

At the Australian Open earlier that year he had a walkover against Tom Okker in the first round and lost in three sets to Toomas Leius in the second.

Marzano made it to the second round, after a victory against Raúl Ramírez, where he was defeated by eventual champion Jan Kodeš.

Marzano was a member of the Italian Davis Cup team in 1969 and 1973 and had a 1–4 win–loss record, playing only in the doubles.