Tatiana Grigorieva (born October 8, 1975 in Leningrad, Russia) is a retired Australian pole vaulter. She retired from the sport in 2007 after a 10 year career that saw her win Olympic, Commonwealth and World Championship medals. She went on to star in series six of Dancing with the Stars and is now appearing in her new role as Olympia on the 2008 revival of Gladiators.

As a former national level hurdler in Russia, Tatiana took up pole vaulting when she migrated to Australia in 1997. Within 12 months of picking up a pole, she became one of the world's best, placing third in the 1998 Goodwill Games in New York.