Karl William Ouimette (born June 18, 1992) is a Canadian professional soccer player who plays as a defender for Celtix du Haut-Richelieu in Ligue1 Québec.

[8] Ouimette would start in the championship final match against the Serbian White Eagles where Trois-Rivières defeated the reigning champions in a penalty shootout.

[18] A couple of weeks after being signed, Ouimette made his professional soccer debut in a league match against the Houston Dynamo.

[19] On October 19, 2013, Karl Ouimette scored his first MLS goal and game winner in a comeback 2–1 victory over the Philadelphia Union.

[24] On June 23, 2015, Ouimette was selected to the USL Team of the Week for his performance for NYRBII in a 2–0 victory over Louisville City FC.

[35] On March 19, 2022, Ouimette became the first player in Indy Eleven history to earn 100 starts with his selection in a 2-0 loss to the Tampa Bay Rowdies.

[37] On May 2, 2022, Detroit City FC announced its acquisition of Ouimette on loan from Indy Eleven for the remainder of the 2022 USL Championship season.

[38] On January 31, 2023, Atlético Ottawa announced Ouimette had signed a two-year contract with the club ahead of the 2023 Canadian Premier League season.

The match was dedicated to his sister, Julie, who died a few days earlier after a 12-year battle with Philadelphia chromosome-positive acute lymphoblastic leukemia.