Katrina Maree "Triny" Powell OAM (born 8 April 1972 in Canberra, Australian Capital Territory) is an Australian field hockey player.

She represented Australia in three consecutive Summer Olympics, starting in 1996.

Powell was a member of the Australian Women's Hockey Team, known as the Hockeyroos, that won the gold medals at the 1996 and the 2000 Summer Olympics.

She is the sister of Lisa Powell and the sister-in-law of Stuart Carruthers.

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