Browse People - O
- Oats, William Nicolle (1912 - 1999)
- Oberon, Merle (c. 1911 - 1979), Actor
- O'Byrne, Justin (1912 - 1994), Politician
- O'Connor, Roderic (1784 - 1860), Pastoralist and Public Servant
- O'Donnell, Thomas Joseph (1876 - 1949), Clergyman
- Ogilvie, Albert George (1890 - 1939), Lawyer and Politician
- Oldaker, Max (1907 - 1972), Actor
- O'Malley, King (c. 1858 - 1953), Politician
- Orr, Sydney Sparkes (1914 - 1966), Philosopher