| Bret de Thier | |
| Full Name: | Bret Geoffrey de Thier |
| Country: | New Zealand |
| Sport: | Sailing |
| Birth Date: | 14 June 1945 |
| Birth Place: | Christchurch, New Zealand |
Bret Geoffrey de Thier (born 14 June 1945) is a New Zealand sailor. He competed in the Finn event at the 1972 Summer Olympics.[1]