| Municipality of Šoštanj | |
| Native Name: | Občina Šoštanj |
| Native Name Lang: | sl |
| Settlement Type: | Municipality |
| Coordinates: | 46.4°N 18°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Slovenia |
| Established Title: | Established |
| Established Date: | 1994 |
| Leader Title: | Mayor |
| Leader Name: | Darko Menih |
| Unit Pref: | Metric |
| Area Total Km2: | 95.6 |
| Population Footnotes: | [1] |
| Population Total: | 8254 |
| Population As Of: | 2002 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +02 |
The Municipality of Šoštanj (in Slovenian pronounced as /ˈʃoːʃtan/; Slovenian: 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: