The union of the rivers Luna and Omaña at this point form the Órbigo river
|- right||Duerna, Tuerto, Jamuz and Eria|
|Source||Union of the rivers Luna and Omaña|
|- location||Secarejo, Cimanes del Tejar, Ribera del Órbigo, León, Castile and León, Spain|
|- elevation||902 m (2,959 ft)|
|- location||Santa Colomba de las Monjas, Benavente y Valles, Zamora, Castile and León, Spain|
|- elevation||702 m (2,303 ft)|
|Length||162 km (101 mi)|
|Basin||4,995 km2 (1,929 sq mi)|
|- average||38.81 m3/s (1,371 cu ft/s)|
The Órbigo River is a river in the provinces of León and Zamora, Spain. It begins at the convergence of the Luna River and the Omaña River in the town of Secarejo, in the Cimanes del Tejar municipality. Decades ago, that confluence was some km. defore, in the town of Santiago del Molinillo. It flows from north to south through the province of León and ultimately flows into the Esla River below Benavente.
How the river came to have this name is not known. Órbigo etymologically signifies "two rivers" (from the Basque "Ur-bikoa"). There exists a theory that the river now called the Luna should be the real start of the Órbigo. Although it was the same river, in the times of the Conde Luna, it was ordered to change that name of the river so that the part in the county would have its name.
- Special tributary: Presa Cerrajera, which splits from the Órbigo and later flows into it again