| Official Name: | Ostrožnik |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Lower Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Southeast Slovenia |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Mokronog-Trebelno |
| Area Total Km2: | 0.86 |
| Population As Of: | 2023 |
| Population Total: | 56 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 45.9417°N 15.1181°W |
| Elevation M: | 248.4 |
| Footnotes: | [1] |
Ostrožnik (in Slovenian pronounced as /ɔˈstɾoːʒnik/; German: Ostroschnik[2]) is a small village east of Mokronog in the Municipality of Mokronog-Trebelno in southeastern Slovenia. The municipality is part of the historical region of Lower Carniola and is now included in the Southeast Slovenia Statistical Region.[3]