The town is at the western end of Lake Saint-Louis, and borders the local island communities of Terrasse-Vaudreuil, Pincourt and Notre-Dame-de-l'Île-Perrot.

The island was granted on October 29, 1672, to François-Marie Perrot (1644-1691), captain in the Picardy Regiment and governor of Montreal in 1670.

[2] In 1949, L'Île-Perrot greatly reduced in size when a large part of its territory was split off to form the new Parish Municipality of Notre-Dame-de-l'Île-Perrot.

There is a shuttle bus service operated by CIT La Presqu'Île connecting to the Île-Perrot station on the Vaudreuil-Hudson commuter rail line.

There are 3 francophone elementary schools (Virginie Roy, François-Perrot and La Perdriolle) and an adult education centre in L'Île-Perrot, all run by the Commission Scolaire des Trois-Lacs.