Morsang-sur-Orge (French pronunciation: [mɔʁsɑ̃ syʁ ɔʁʒ] ⓘ, literally Morsang on Orge) is a commune in the southern suburbs of Paris, France.

It is located 21.2 km (13.2 mi) from the center of Paris.

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

The closest station to Morsang-sur-Orge is Savigny-sur-Orge station, which is approximately a 22-minute train journey from the center of Paris on the Paris RER line .

This station is located in the neighboring commune of Savigny-sur-Orge, 1.6 km (0.99 mi) from the town center of Morsang-sur-Orge.