| Obediah Timbaci | |
| Nationality: | Vanuatuan |
| Birth Date: | 3 June 2003 |
| Sport: | Track and Field |
| Event: | 400 metres |
Obediah Timbaci (born 3 June 2003) is a Vanuatuan sprinter who competes in the 400 metres event. Timbaci won bronze as part of the Vanuatu 4 x 400 metres relay team at the 2019 Pacific Games in Samoa.
Timbaci competed at the 2022 Oceania Athletics Championships, placing 7th. Timbaci also competed at the 2022 World Athletics Championships.[1]