| Oña | |
| Official Name: | Muy Leal y Valerosa Villa de Oña |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Postal Code: | 09530 |
| Leader Title: | Alcalde |
| Leader Name: | Arturo Luis Pérez López |
| Leader Party: | PSOE |
| Area Total Km2: | 161.64 |
| Elevation M: | 598 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Coordinates: | 42.7331°N -3.4°W |
| Pushpin Map: | Spain Province of Burgos#Spain Castile and León#Spain |
| Pushpin Map Caption: | Location in Spain. |
Oña is a municipality and town located in the province of Burgos, Castile and León, Spain. According to the 2011 census (INE), the municipality has a population of 1,219 inhabitants.