This vast territory, located in the south of León Province, is bordered to the north by the lands of Astorga, Omaña and León, and to the south by the province of Zamora. The River Esla forms the eastern boundary, although some municipalities located in the left side are included in POEDA. To the west, the River Órbigo delimits the area, although, just like the east, there are several municipalities included in POEDA that are located in the right side of this river.

The municipalities that make up the territory are: Algadefe, Alija del Infantado, La Antigua, Ardón, Benavides, Bercianos del Páramo, Bustillo del Páramo, Cabreros del Río, Campo de Villavidel, Carrizo, Cebrones del Río, Chozas de Abajo, Cimanes de la Vega, Cimanes del Tejar, Fresno de la Vega, Hospital de Órbigo, Laguna Dalga, Laguna de Negrillos, Llamas de la Ribera, Onzonilla, Pobladura de Pelayo García, Pozuelo del Páramo, Quintana del Marco, Regueras de Arriba, Roperuelos del Páramo, San Adrián del Valle, San Esteban de Nogales, San Millán de los Caballeros, San Pedro Bercianos, Santa María del Páramo, Santa Marina del Rey, Santovenia de la Valdoncina, Soto de la Vega, Toral de los Guzmanes, Turcia, Urdiales del Páramo, Valdefuentes del Páramo, Valdevimbre, Valencia de Don Juan, Valverde de la Virgen, Vega de Infanzones, Villadangos del Páramo, Villademor de la Vega, Villamañán, Villamandos, Villanueva de las Manzanas, Villaornate y Castro, Villaquejida, Villarejo de Órbigo, Villares de Órbigo, Villaturiel, Villazala, and Zotes del Páramo.