| Quintanilla de Onsoña | |
| Settlement Type: | municipality |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location of Quintanilla de Onsoña in Spain |
| Coordinates: | 42.4689°N -4.6642°W |
| Established Date: | 1000 AC |
| Leader Party: | PP |
| Leader Title: | Mayor |
| Leader Name: | María Teresa Carmona Crespo |
| Unit Pref: | Metric |
| Area Total Km2: | 51.06 |
| Elevation M: | 888 |
| Population Density Km2: | auto |
| Population Demonym: | Quintanillense |
| Postal Code: | 34114 |
Quintanilla de Onsoña[1] is a municipality in the province of Palencia, in the autonomous community of Castile-Leon, Spain.
The village is located on the banks of the Carrión River. The municipal, Quintanilla, is located at 888 m altitude, 58 km far from the city of Palencia and in 2011 had 55 inhabitants (208 in the entire municipality) over an area of 52 km ².
Agriculture, tourism and industry.