Robert Gary Giltinan OAM (born 4 July 1949) is an Australian former professional tennis player who was a grass court specialist.

Beginning his tennis career in the 1960s, it was halted for two years when he completed National Service with the Australian Army during the Vietnam War.

He won one singles title at Surbiton in 1974, defeating Syd Ball in straight sets, and reached the final of Newport in 1973, falling to Roger Taylor of Great Britain 8–9 6–8.

He also represented the Cleveland Nets in World Team Tennis during the 1970s, partnering Björn Borg, Marty Riessen and Martina Navratilova.

Giltinan's best Grand Slam doubles forays include a three set loss with Syd Ball to Ross Case and Geoff Masters in the 1973 Australian Open final, after defeating the far more famous pairing of Roche/Newcombe 6–4, 5–7, 12–10 in the semi-finals.

[10][11] On 10 June 2019, Giltinan was awarded the Medal of the Order of Australia (OAM) for "service to tennis, and to the community of the Northern Beaches".