Saint-Imier (French pronunciation: [sɛ̃.t‿imje]) is a municipality in the Jura bernois administrative district in the Canton of Bern in Switzerland. It is located in the French-speaking Bernese Jura (Jura Bernois).

The Observatoire Astronomique de Mont-Soleil is located above the village.

Saint-Imier is first mentioned in 884 as cella de sancti Himerii. The municipality was formerly known by its German name St. Immer, however, that name is no longer used.