It is located 62.9 km (39.1 mi) northwest from the centre of Paris.

Gisors, together with the neighbouring communes of Trie-Château and Trie-la-Ville, form an urban area of 13,915 inhabitants (2018).

[3] This urban area is a satellite town of Paris.

Gisors is located in the Vexin normand region of Normandy, at the confluence of the rivers Epte, Troesne and Réveillon.

The Gisors station is the terminus of a Transilien suburban rail service from the Paris Saint-Lazare station, and of a TER Normandie local service to Serqueux.