Mateusz Chowaniec (born 3 October 2003 in Katowice[1]) is a Polish swimmer and double European Championship silver medalist.
Chowaniec began his swimming career at Wodnik Siemianowice Śląskie[1] and, since 2023, has been competing for AZS-AWF Katowice.
In 2019, he won a gold medal in the 50-meter freestyle at the Summer European Youth Olympic Festival.
[3] He was a candidate for the Tokyo 2020 Olympics, but was incorrectly registered and not allowed to compete.
[5] He is the Polish senior record holder in the mixed 4 × 200-meter freestyle relay (7:41.29 - 16 August 2022 at the European Championships in Rome).