Sahagún is a town and municipality of Spain, part of the autonomous community of Castile and León and the province of León. It is the main populated place in the Leonese part of the Tierra de Campos natural region.

Tierra de Campos is a large historical and natural region or greater comarca that straddles the provinces of León, Zamora, Valladolid and Palencia, in Castile and León, Spain. It is a vast, desolate plain with practically no relief, except for some wide undulations of the terrain.