| Ulla | |
|---|---|
| Origin | Monterroso, Galicia, Spain |
| Mouth | Ría de Arosa, Galicia, Spain |
| Basin countries | Spain |
| Length | 132 km (82 mi) |
| Basin area | 2.764 km2 (1.067 sq mi) |
The Ulla River (río Ulla in Galician and Spanish) is a river in Galicia, Spain.
Its source is sometimes given as Antas de Ulla es:Antas de Ulla and sometimes the neighbouring municipality of Monterroso. It flows to Ría de Arosa. Its basin is the largest in Galicia after the Minho River. Tributaries include the River Deza and the River Arnego.