| Osor | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Province of Girona#Spain |
| Pushpin Map Caption: | Location in Catalonia |
| Coordinates: | 41.9475°N 2.5569°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Girona |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Selva |
| Leader Title: | Mayor |
| Leader Name: | Joan Pla Coll (2015)[1] |
| Area Footnotes: | [2] |
| Area Total Km2: | 52.1 |
| Elevation M: | 340 |
| Population Density Km2: | auto |
Osor (in Catalan; Valencian pronounced as /uˈzo/) is a municipality in the comarca of la Selva in Catalonia, Spain.