Santa Eulalia Bajera 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 sparsely populated region of the Ebro valley.
The municipality covers an area of 8.43 square kilometres (3.25 square miles). As of 2011, it had a population of 130 people, reflecting the small scale typical of villages in this part of La Rioja.