Hormilla 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 country's north.
The municipality covers an area of 15.86 square kilometres (6.12 square miles). As of 2011, it had a population of 453 people, making it a small rural settlement typical of the sparsely populated villages found across La Rioja.