Optus
| Optus headquarters in Macquarie Park | |
| Company 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 | Optus Sport Amaysim | 
| Website | optus | 
Singtel Optus Pty Limited is an Australian telecommunications company headquartered in Macquarie Park, a suburb in the Northern Sydney region of Sydney, New South Wales, Australia. It is a wholly owned subsidiary of Singaporean telecommunications company Singtel.
Optus is the second-largest telecommunications company in Australia, with over 11 million customers as of 2023. Its mobile network covers 98.5% of the Australian population, with plans to cover 100% of Australia by 2025 through its partnership with SpaceX.