Katrina Bellio (born August 1, 2004) is a Canadian competitive swimmer who specializes in the freestyle.

[1][2] In 2019, Bellio won a bronze medal at the 2019 FINA World Junior Swimming Championships in Budapest, as part of the 4x200 women's freestyle relay.

As part of the 2021 Canadian Olympic swimming trials in Toronto, Bellio won the 1500 metre freestyle race.

[7] In 2022, Bellio was named to Canada's World Championship and Commonwealth Games teams for the first time.

On the first day of the Commonwealth Games in Birmingham, she qualified to her first senior championship final, finishing seventh in the 200 m freestyle.