Keolis Downer
| Company type | Joint venture | 
|---|---|
| Industry | Public transport | 
| Founded | 30 November 2009 | 
| Headquarters | Sydney | 
| Area served | Australia | 
| Key people | Julien Dehornoy (CEO) | 
| Products | Bus, Train, Tram and Ferry operations | 
| Owner | Keolis (51%) Downer Rail (49%) | 
| Subsidiaries | G:link Hornibrook Bus Lines Keolis Downer Northern Beaches LinkSA Newcastle Transport Path Transit SouthLink | 
| Website | keolisdowner | 
Keolis Downer is a public transport operator that operates bus, train, tram and ferry services in Australia. It is a joint venture between Keolis, the largest private sector French transport group, and Downer Rail, an Australian railway engineering company.