Optus
 | |
 Optus headquarters in Macquarie Park | |
| Type | Subsidiary |
|---|---|
| Industry | Telecommunications |
| Founded | 1981 (as AUSSAT) |
| Headquarters | Macquarie Park, New South Wales, Australia |
Area served | Australia |
| Key people | |
| Products | Fixed telephony Mobile telephony Internet access Cable television Leased lines Data transmission |
| Revenue |  A$8.05 billion (2023) |
| A$2.09 billion (2023) | |
| A$286 million (2023) | |
Number of employees | 7,572 (2023) |
| Parent | Singtel |
| Divisions | Amaysim |
| Website | optus |
Singtel Optus Pty Limited is a major Australian telecommunications company headquartered in Macquarie Park, Sydney. Optus is the second-largest telecommunications company in Australia, with over 10.7 million mobile customers and 1.3 million home customers as of 2025. Its mobile network covers 99.11% of the Australian population as of 2026, with plans to cover all of Australia by 2026 through its partnership with SpaceX.
Optus is a wholly owned subsidiary of Singaporean telecommunications company Singtel.