| Jaclyn Stelmaszyk | |
| Birth Name: | Jaclyn Halko |
| Collegeteam: | University of Western Ontario[1] |
| Birth Date: | 16 December 1986 |
| Birth Place: | Toronto, Ontario |
| Height: | 171 cm |
| Weight: | 59 kg |
Jaclyn Stelmaszyk (Halko, born December 16, 1986) is a world champion Polish Canadian rower. She won gold in the lightweight women's quad sculls at the 2012 World Rowing Championships as a competitor for Poland. Stelmaszyk returned to the Canadian team and is the reigning Pan American Games Champion, winning gold in the lightweight women's double sculls with Kate Haber at the 2019 Pan Am Games in Lima. In December 2019 Jaclyn was granted an exemption to the three year rule by the Olympic executive board to change nationalities from Canada to Poland. She immediately began training with the Polish Rowing Federation (PZTW) in hopes of qualifying a lightweight double boat for the 2020 Tokyo Olympic games.[2]