| Official Name: | Avellanosa de Muñó |
| Settlement Type: | Municipality and town |
| Flag Size: | 150 |
| Seal Size: | 75 |
| Pushpin Map: | Spain Castile and León#Spain |
| Coordinates: | 41.9836°N -3.8244°W |
| Leader Title: | Mayor |
| Leader Name: | Enrique Manuel Ortega García |
| Leader Party: | Spanish Socialist Workers' Party |
| Postal Code Type: | Postal code |
| Postal Code: | 09345 |
| Area Total Km2: | 36.89 |
| Elevation M: | 877 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Avellanosa de Muñó is a municipality and town located in the province of Burgos, Castile and León, Spain. According to the 2013 census (INE), the municipality has a population of 122 inhabitants.
The municipality of Avellanosa de Muñó is made up of four towns: Avellanosa de Muñó (seat or capital), Paúles del Agua, Pinedillo and Torrecitores del Enebral.