Vestre Slidre is a municipality in Oppland county, Norway. It is part of the traditional region of Valdres. The administrative centre of the municipality is the village of Slidre. The old municipality of Slidre was divided into Vestre Slidre and Øystre Slidre in 1849.
The municipality (originally the parish) is named after the old Slidre farm (Old Norse: Slíðrar), since the first church was built here. The name is probably derived from slíðr which means "sheath" (which is probably referring to a long depression near the church). The meaning of the name Vestre Slidre is "(the) western (part of) Slidre" (since the parish and municipality of Slidre was divided in 1849.)