(population: 16,940) is a municipality in the eastern Netherlands
, in the province of Overijssel
. The municipality covers an area of 118.50 km²
(of which 2.52 km² water).
The municipality of Olst-Wijhe consists the following towns, villages and townships: Boerhaar, Boskamp, Den Nul, Duur, Eikelhof, Elshof, Fortmond, Hengforden, Herxen, Marle, Middel, Olst, Welsum, Wesepe, Wijhe.