Grimentz is a village in the district of Sierre in the Swiss canton of Valais . An independent municipality before, it merged on 1 January 2009 with neighboring Ayer, Chandolin , Saint Jean, Saint-Luc and Vissoie to form the municipality of Anniviers .

Grimentz is first mentioned in 1052 as Grimiens. The village was formerly known by its German name Grimensi, however, that name is no longer used.

Lac de Moiry is a reservoir completed 1958. Lac des Autannes is located at an elevation of 2,686 m (8,812 ft).