Thomas L. Kennedy Secondary School (aka, T. L. Kennedy Secondary School) is a school located in Mississauga, Ontario, that was erected in honour of former Premier of Ontario, Thomas Laird Kennedy. Kennedy had been a longtime resident of the Dixie area of Cooksville, Ontario (now part of Mississauga). He was Master of the River Park Masonic Lodge in Streetsville, Ontario. Thomas L. Kennedy Secondary School first opened to approximately four hundred and fifty students in September 1953.
The premiere of T. L. Kennedy's Leadership Academy was in September 2013. Students apply for this program in grade 8. T.L. Kennedy began a new academic program in 2011 that allows students to obtain a "Specialist High Skills Major" in Business on their Ontario Secondary School diploma. The school has also started a "Specialist High Skills Major" in Technology from the beginning of the 2012 school year.
The school has an extracurricular program, including athletic and sports teams. The school has successful basketball and cricket teams.
T.L. Kennedy has a music program including clubs such as the TLK Rock Band and the TLK Choir. Students from all grades participate in these clubs and perform at many school wide and community events.