A Montreal borough, Pierrefonds-Roxboro is bordered to the south and west by the West Island municipalities of Kirkland, Pointe-Claire, Dollard-des-Ormeaux, Senneville and Sainte-Anne-de-Bellevue. Besides sharing a land border with the borough of île-Bizard-Sainte-Geneviève, it is bordered to the north by the Rivière des Prairies and to the west by Ahuntsic-Cartierville and Ville Saint-Laurent.