| Riaño | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain |
| Coordinates: | 42.9747°N -5.0119°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Name: | Spain |
| Subdivision Name1: | Castile and León |
| Subdivision Type2: | Province |
| Subdivision Name2: | León |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Montaña de Riaño |
| Leader Title: | Mayor |
| Leader Name: | Manuel Javier Fernández Presa |
| Area Total Km2: | 97.63 |
| Elevation M: | 1112 |
| Population Density Km2: | auto |
| Population Demonym: | Riañéses |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 24900 |
Riaño is a town and former municipality located along the Esla River in the mountains of the province of León, in the autonomous community of Castile and León, northern Spain. The village is across the reservoir from Peak Gilbo. Located 3650 feet above sea level, it is in the Cantabrian mountains near the foothills of the Picos de Europa.
Due to planned construction of a dam and reservoir in the 1980s, for flood control and generation of hydroelectric power, the village and its lowlying farmland were submerged, as were six other villages in the associated dam project. The residents were relocated to New Riaño, built as a replacement higher above the reservoir waters.[1] In 2010 the village had 532 residents.