Pradillo is a village and municipality in the province and autonomous community of La Rioja, in northern Spain. It lies within the Ebro Valley region of La Rioja, a small autonomous community in the north of the country.
The municipality covers an area of 10.28 square kilometres (3.97 square miles). As of 2011, it had a population of 66 people, making it one of the many small, sparsely populated rural settlements characteristic of the La Rioja countryside.