Robres del Castillo 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 the country, in an area characterised by a sparse, rural population.
The municipality covers an area of 35.88 square kilometres (13.85 square miles). As of 2011, it had a population of 30 people, making it one of the smallest and most thinly populated municipalities in La Rioja.