Valangin (French pronunciation: [valɑ̃ʒɛ̃]) is a former municipality in the district of Val-de-Ruz in the Canton of Neuchâtel in Switzerland . On 1 January 2021 the former municipalities of Corcelles-Cormondrèche , Peseux and Valangin merged into the municipality of Neuchâtel.

Valangin is first mentioned in 1241 as de Valengiz.

Valangin had an area, as of 2009, of 3.8 square kilometers (1.5 sq mi). Of this area, 1.48 km2 (0.57 sq mi) or 39.4% is used for agricultural purposes, while 1.87 km2 (0.72 sq mi) or 49.7% is forested. Of the rest of the land, 0.34 km2 (0.13 sq mi) or 9.0% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.3% is either rivers or lakes.