Xenia Peni (born February 28, 1983) is a Papua New Guinean former swimmer, who specialized in breaststroke events.
Peni represented Papua New Guinea, as a 17-year-old, at the 2000 Summer Olympics, where she became the nation's first female flag bearer in the opening ceremony.Peni competed only in the women's 100 m breaststroke at the 2000 Summer Olympics in Sydney.
She received a ticket from FINA, under a Universality program, in an entry time of 1:18.58.
She challenged seven other swimmers in heat two, including Bolivia's 26-year-old Katerine Moreno and Angola's Nádia Cruz, who competed in her fourth Olympic Games at age 25.
She trailed behind Cruz in a spirited challenge by five-hundredths of a second (0.05) to round out the field in 1:19.62.
Peni failed to advance into the semifinals, as she placed thirty-ninth overall in the prelims.