| Municipality of Osilnica | |
| Native Name: | Občina Osilnica |
| Native Name Lang: | sl |
| Settlement Type: | Municipality |
| Pushpin Label Position: | left |
| Coordinates: | 45.5289°N 14.6981°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Slovenia |
| Leader Title: | Mayor |
| Leader Name: | Alenka Kovač |
| Unit Pref: | Metric |
| Area Total Km2: | 36.2 |
| Population Footnotes: | [1] |
| Population Total: | 332 |
| Population As Of: | 2002 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +02 |
The Municipality of Osilnica (pronounced as /sl/; sl|Občina Osilnica) is a municipality in southern Slovenia. It gets its name from the largest settlement and seat of the municipality, Osilnica.[2] It borders Croatia.
In addition to the municipal seat of Osilnica, the municipality also includes the following settlements: