Cornoncillo is a hamlet in the municipality of Congosto de Valdavia. This municipality belongs to the province of Palencia and the autonomous community (first level division of Spain) of Castile and León.[1] Its population consisted in 9 inhabitants in the year 2017.[2]
This hamlet has been related to a military campaign of Augustus against the Cantabri by several people.[3]
In the late 19th century, Cornoncillo was inhabited by 115 people.