Robert Carlo Mariano (born December 25, 1975), known by the nickname Boston Rob, is an American television personality, known for appearing in the CBS reality show Survivor. He placed tenth in the show's fourth season Survivor: Marquesas, finished as the runner-up to his eventual wife Amber Brkich in the show's eighth season Survivor: All-Stars, came in 13th place in the show's 20th season Survivor: Heroes vs. Villains, and won the show's 22nd season Survivor: Redemption Island. He returned for the show's 39th season Survivor: Island of the Idols as a mentor for the new players alongside Sandra Diaz-Twine. He competed for a 5th time, coming in 17th place in the show's 40th season Survivor: Winners at War. Mariano is the first contestant to compete on Survivor five times.

He also competed on other reality shows, including on The Amazing Race twice alongside his wife (The Amazing Race 7 and The Amazing Race 11: All-Stars), as well as Deal or No Deal Island and The Traitors 3.