Villarejo is a village and municipality in the province and autonomous community of La Rioja, in northern Spain. It is one of the many small settlements that make up this wine-producing region in the Ebro valley.
The municipality covers an area of 6.38 square kilometres (2.46 square miles). According to the latest available census, it had a population of 9 people, making it one of the smallest municipalities in La Rioja by population.