Wijdemeren (Dutch pronunciation: [ˌʋɛidəˈmeːrə(n)] ^ⓘ) is a municipality in the Netherlands, in the province of North Holland, on the western border of the Gooi region.

Wijdemeren contains many lakes, including Spiegelplas and Ankeveense Plassen in the north(east) and Loosdrechtse Plassen in the (south)west.

Wijdemeren was established as a merger of 's-Graveland, Loosdrecht, and Nederhorst den Berg on 1 January 2002. The former municipality of Loosdrecht belonged to the province of Utrecht.

The municipality of Wijdemeren includes the following small towns and villages:

Map of the municipality of Wijdemeren, 2013.