Saint-Hubert is a borough in the city of Longueuil, located in the Montérégie region of Quebec, Canada. It had been a separate city prior to January 1, 2002, when it along with several other neighbouring south shore municipalities were merged into Longueuil. According to the Quebec Statistics Institute, Saint-Hubert had 78,336 in 2006. The area of the borough is 65.98 km². Longueuil's city hall is now located in Saint-Hubert. Saint-Hubert is located about 14 kilometers (almost 9 miles) from downtown Montreal.
The borough has a wide array of commercial, industrial and agricultural enterprises. The aerospace industry is arguably the most important of these enterprises. Pratt & Whitney Canada designs and manufactures jet engines at a plant near Saint-Hubert Airport. The Canadian Space Agency has its head office in the borough. The École nationale d'aérotechnique, a school that teaches aeronautics is located in the borough and operated by Collège Édouard-Montpetit.