Pradejón is a municipality in the province and autonomous community of La Rioja, in northern Spain. It lies within the Ebro Valley region of La Rioja, a predominantly agricultural area of the country's north.
The municipality covers an area of 31.76 square kilometres (12.26 square miles). As of 2011, it had a population of 4,094 people. It is a village-scale settlement rather than a large urban centre.