Baulne (French pronunciation: [boln] ⓘ) is a commune in the Essonne department in Île-de-France in northern France.

The origin of the name Baulne is unknown.

Baulne is 52 km (32 mi) south of Paris Notre Dame, kilometre zero for the roads in France, 17 km (11 mi) south east of Évry, 16 km (10 mi) north east of Étampes, 1 km (1 mi) north of La Ferté-Alais, 13 km (8 mi) south east of Arpajon, 13 km (8 mi) north west of Milly-la-Forêt, 16 km (10 mi) south east of Corbeil-Essonnes, 18 km (11 mi) south east of Montlhéry, 26 km (16 mi) south east of Palaiseau, 56 km (35 mi) east of Dourdan.

It is 107 km (66 mi) away from its former homonym Baulne-en-Brie in the department of Aisne.

This Essonne geographical article is a stub.