Os de Civís is a village in the central Pyrenees mountains in the province of Lleida, Spain, and is located to the west of Andorra, near the villages of Aixàs and Bixessarri. Civís is the nearest Spanish village. It is the most populated village in the municipality (Les Valls de Valira). Os de Civís is very close to the Spain--Andorra border, and is unique in being the only Spanish village that can be reached by vehicle only by going through Andorra. It has a number of medieval buildings including a Romanesque church.