|Date of birth||November 13, 1997|
|Place of birth||Repentigny, Quebec, Canada|
|Height||1.85 m (6 ft 1 in)|
(on loan from Montreal Impact)
|2018–||→ Ottawa Fury (loan)||23||(1)|
* Senior club appearances and goals counted for the domestic league only and correct as of September 15, 2018|
‡ National team caps and goals correct as of July 24, 2017
Meilleur-Giguère was part of the Montreal Impact Academy U18 side which finished the 2014/15 U.S. Soccer Development Academy in first place in the overall standings. In February 2016, he was one of four teammates who had a training stint with Bologna F.C. 1909 of Serie A. FC Montreal signed Meilleur-Giguère for their 2016 season in the USL and made his professional debut for the club on March 28 in a 2–0 defeat to Toronto FC II. He score two goals in 21 matches for FC Montreal.
In February 2017 Meilleur-Giguère signed with the Ottawa Fury, the Montreal Impact's new affiliate club. He played four matches for the club during the 2017 season. Meilleur-Giguère signed a first-team contract with Montreal Impact on November 13, 2017. However, on February 28, 2018 he was loaned back to the Ottawa Fury.
Meilleur-Giguère was called to numerous Canadian U-18 in 2014 and 2015. On March 17, 2016, he was called up to the Canada U20 squad in their two games against England. In August 2016, he was called up to the U-20 team for a pair of friendlies against Costa Rica Meilleur-Giguère was nominated for Canada's U-20 player of the year in 2016. In February 2017, Meilleur-Giguère was named to Canada's roster for the 2017 CONCACAF U-20 Championship
- As of games played on September 15, 2018.
- Appearances in the Canadian Championship.
- "James Pantemis et Thomas Meilleur-Giguère signent un contrat MLS avec l'Impact". Montreal Impact. Retrieved November 13, 2017.
- "Four players from FC Montreal in Bologna for a training camp". Montreal Impact. Retrieved April 19, 2016.
- "FC Montreal roster unveiled". USL Soccer. Retrieved May 9, 2016.
- "FC Montreal loses 2-0 against Toronto FC II". Montreal Impact. March 28, 2015. Retrieved April 24, 2015.
- "T. Meilleur-Giguère". Soccerway. Perform Group. Retrieved December 5, 2017.
- Ottawa Fury (February 17, 2017). "Fury FC sign Meilleur-Giguere and Mkungilwa from the Montreal Impact".
- "Fury FC adds trio from Impact led by Salazar". Ottawa Fury FC. Retrieved March 1, 2018.
- "Canada Soccer profile: Thomas Meilleur-Giguère". Retrieved May 9, 2016.
- "Canada Soccer selects players for England youth friendly". Canada Soccer. March 20, 2016. Retrieved May 10, 2016.
- "Canada m20 announces squad and matches against Costa Rica". Canada Soccer Association. August 24, 2016.
- Canada Soccer (November 28, 2016). "Award nominees announced for annual Canada Soccer Player Awards". Canada Soccer.
- Neil Davidson (February 9, 2017). "Canada names young squad for CONCACAF U-20 Championship". Sportsnet.