Céligny is a municipality in the canton of Geneva, Switzerland. It consists of two small exclaves of the Canton of Geneva into the Canton of Vaud, near Crans-près-Céligny.

Céligny is first mentioned in 1163 as Siliniacum.

Céligny has an area, as of 2009^[update], of 4.65 square kilometers (1.80 sq mi). Of this area, 3.03 km² (1.17 sq mi) or 65.2% is used for agricultural purposes, while 0.91 km² (0.35 sq mi) or 19.6% is forested. Of the rest of the land, 0.75 km² (0.29 sq mi) or 16.1% is settled (buildings or roads) and 0.01 km² (2.5 acres) or 0.2% is unproductive land.

Of the built up area, housing and buildings made up 11.0% and transportation infrastructure made up 4.9%. Out of the forested land, 15.1% of the total land area is heavily forested and 4.5% is covered with orchards or small clusters of trees. Of the agricultural land, 51.8% is used for growing crops and 11.0% is pastures, while 2.4% is used for orchards or vine crops.

The municipality is a pair of exclaves of the Canton of Geneva, surrounded by the Canton of Vaud. The larger exclave consists of the village of Céligny on a hill above Lake Geneva along with the small Le Brassus valley. The smaller exclave contains the settlements of La Grande and La Petite Coudre.