| Official Name: | Ostra |
| Settlement Type: | Village |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Moravica District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Čačak |
| Unit Pref: | Metric |
| Area Footnotes: | [1] |
| Area Total Km2: | 24.06 |
| Population As Of: | 2011 |
| Population Total: | 918 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 43.9056°N 20.4936°W |
| Elevation M: | 288 |
Ostra is a village in the municipality of Čačak, Serbia. According to the 2011 census, the village has a population of 918 people.[2]