| Olius | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Catalonia |
| Pushpin Map Caption: | Location in Catalonia |
| Coordinates: | 41.974°N 1.558°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Lleida |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Solsonès |
| Leader Title: | Mayor |
| Leader Name: | Antoni Félix Márquez (2015)[1] |
| Area Footnotes: | [2] |
| Area Total Km2: | 54.8 |
| Elevation M: | 565 |
| Population Density Km2: | auto |
Olius (pronounced as /ca/) is a municipality in the comarca of Solsonès in Catalonia, Spain. It is situated on the Cardener River above the reservoir of Sant Ponç. The village is served by the C-149 road between Solsona and Berga. The church of Sant Esteve d'Olius is a protected historico-artistic monument.
The municipality of Olius is formed of four villages. Populations are given as of 2005:
The municipality surrounds Solsona except to the north and includes a small exclave within Solsona.
| Pop 1900: | 488 |
| Pop 1930: | 572 |
| Pop 1950: | 559 |
| Pop 1970: | 323 |
| Pop 1986: | 473 |
| Pop Latest: | 752 |
| Latest Year: | 2006 |