Puteaux is a commune in the western suburbs of Paris, France. It is located in the heart of the Hauts-de-Seine département, at 8.7 km (5.4 miles) from the center of Paris. It is one of the most densely populated municipalities in Europe.
La Défense, Paris' business district hosting the tallest buildings in the metropolitan area, spreads over the northern part of Puteaux (the district being also divided between Courbevoie and Nanterre).
Puteaux is also served by Esplanade de la Défense station on Paris Metro line 1, in the business district of La Défense, as well as by La Défense station, a large interchange station on Paris Metro line 1, on Paris RER line A, on the Transilien La Défense suburban rail line, and on the Transilien Paris – Saint-Lazare suburban rail line.