Châteauguay is a suburb of Montreal.
Chateauguay or Chateaugay may also refer to:
Places Chateauguay / Châteauguay Châteauguay River, flowing in New York State and South-West of Quebec Chateauguay Valley Chateauguay River, a tributary of the Caniapiscau River, in Nord-du-Québec, Québec, Canada
Chateaugay / Châteaugay Chateaugay (village), New York Chateaugay (town), New York Châteaugay, a commune of the Puy-de-Dôme Department in France
Electoral districts in Quebec, Canada Châteauguay (federal electoral district), former federal electoral district Châteauguay—Huntingdon, former federal electoral district Châteauguay—Huntingdon—Laprairie, former federal electoral district Châteauguay—Saint-Constant, former federal electoral district Châteauguay—Lacolle, current federal electoral district Châteauguay (provincial electoral district)
Other uses Charles le Moyne de Longueuil et de Châteauguay (1626–1685), French-born soldier and Lord in New France Battle of the Chateauguay , the Joint Support Ship Project Queenston-class ship Chateaugay (horse) (1960–1985), American Thoroughbred racehorse Chateauguay River, New York