| Official Name: | Santa María del Mercadillo |
| Settlement Type: | Municipality and town |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain. |
| Postal Code: | 09453 |
| Area Total Km2: | 30.208 |
| Elevation M: | 961 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Coordinates: | 41.86°N -3.5589°W |
| Website: | http://www.santamariadelmercadillo.es/ |
Santa María del Mercadillo is a municipality and town located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), the municipality had a population of 167 inhabitants.