Place D’Youville, also referred to as carré D'Youville, is a public square in the core of Quebec City, Quebec, Canada. It is situated on rue Saint-Jean, one of the oldest roads in Quebec City. It marks the boundary between the Quebec Parliament Hill and Old Quebec. The square is named in honour of Marie-Marguerite d'Youville, a French Canadian widow who founded the religious order known as the Grey Nuns of Montreal.