Greenfield Park is a former city in southwestern Quebec, Canada. It is currently a borough of the city of Longueuil. It covers an area of 4.78 square kilometres (1.85 sq mi), with a population of 16,969 at the 2011 census of Canada. Greenfield Park is the only borough of Longueuil that has an officially bilingual status. It is primarily a post-war suburban area. Like the other two boroughs, most of the buildings in Greenfield Park are single-family homes.