Marin-Epagnier was a municipality in the district of Neuchâtel in the Swisscanton of Neuchâtel. In 1888, the formerly independent municipality merged with Epagnier and Marin to form Marin-Epagnier. On 1 January 2009, the former municipalities of Marin-Epagnier and Thielle-Wavre joined together and became the new municipality of La Tène.
It lies at the northeastern tip of Lake Neuchâtel close to Biel, at the boundary between French- and German-speaking regions, and at a knot of highways.