Chicago Red Stars St-Georges was selected in the third round (20th overall) by the
Chicago Red Stars in the
2019 NWSL College Draft, being the only Canadian player to be drafted. However, her rookie season was delayed until the following year, as she suffered a meniscus tear in her knee. She made her debut for
Chicago Red Stars on June 28, 2020, against the
Washington Spirit in the
2020 NWSL Challenge Cup. She scored her first professional goal and assist came in the Challenge Cup Semi-final against
Sky Blue FC on July 23, 2020, and helped the Red Stars reach the final, where they ultimately finished second. In 2021, the Red Stars finished as runner-ups in the 2021 NWSL playoffs. On September 25, 2022, she showed both middle fingers to the referee and was handed a red card as the Red Stars lost 3–0 to the
Portland Thorns. Beyond the usual one-game penalty for a red card, the NWSL suspended her for an additional game and issued a fine.
North Carolina Courage In January 2024, St-Georges signed a two-year contract with the
North Carolina Courage. She scored twice in her debut as the Courage won 5–1 over the
Houston Dash in the season opener. She made 22 appearances and scored 3 goals before mutually agreeing to end her contract after one season with the Courage in February 2025.
Utah Royals St-Georges joined the
Utah Royals in March 2025, signing a one-year deal as a free agent. She made a goalscoring debut on a long assist from goalkeeper
Mandy McGlynn in the season-opening 1–1 draw against
Bay FC. She made 22 appearances and scored 3 goals in the NWSL before departing from the club upon the expiration of her contract.
Boston Legacy On January 2, 2026, NWSL expansion club
Boston Legacy FC announced that they had signed St-Georges to a three-year contract through 2028. ==International career==