The Municipality of Šoštanj (pronounced [ˈʃoːʃtan] ⓘ; Slovene: Občina Šoštanj) is a municipality in northern Slovenia.

The seat of the municipality is the town of Šoštanj.

[2] The municipality was established on 3 October 1994, prior to which it belonged to the larger Municipality of Velenje.

[3] The municipal holiday is celebrated on 30 October.

[4] In addition to the namesake city, the municipality also includes the following settlements: