Gournay-sur-Marne (French pronunciation: [ɡuʁnɛ syʁ maʁn] ⓘ, literally Gournay on Marne) is a commune in the eastern suburbs of Paris, France, in the Seine-Saint-Denis department.

It is located 16.4 km (10.2 mi) from the center of Paris.

Gournay-sur-Marne is served by no station of the Paris Métro, RER, or suburban rail network.

The closest station to Gournay-sur-Marne is Chelles – Gournay station on Paris RER line E and on the Transilien Paris – Est suburban rail line.

This station is located in the neighboring commune of Chelles, 1.3 km (0.81 mi) from the town center of Gournay-sur-Marne.