| Tambunan District | |
| Settlement Type: | District |
| Official Name: | Daerah Tambunan |
| Translit Lang1: | Other |
| Translit Lang1 Type1: | Jawi |
| Translit Lang1 Info1: | داءيره تمبونن |
| Translit Lang1 Type2: | Chinese |
| Translit Lang1 Info2: | Chinese: 担布南县 Dānbùnán xiàn |
| Translit Lang1 Type3: | Tamil |
| Translit Lang1 Info3: | Tampuṉāṉ māvaṭṭam |
| Translit Lang1 Type4: | Kadazandusun |
| Translit Lang1 Info4: | Watas Tambunan |
| Image Alt: | Tambunan District Council |
| Leader Title: | District Officer |
| Leader Name: | Blasius Sobitun Makajil |
| Nickname: | "the place where the Warrior, Gombunan and Tamadon were born." |
| Coordinates: | 5.674°N 116.3649°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Malaysia |
| Subdivision Type1: | State |
| Subdivision Type2: | Division |
| Subdivision Name2: | Interior |
| Seat Type: | Capital |
| Seat: | Tambunan |
| Area Total Km2: | 1347 |
| Population As Of: | 2010 |
| Population Total: | 35,667 |
| Website: | |
The Tambunan District (ms|Daerah Tambunan) is an administrative district in the Malaysian state of Sabah, part of the Interior Division which includes the districts of Beaufort, Keningau, Kuala Penyu, Nabawan, Sipitang, Tambunan and Tenom. The capital of the district is in Tambunan Town.
The name of this area is taken from the word "Tamadon" and "Gombunan" which combined into "Tambunan".[1]
See also: Demographics of Sabah. According to the last census in 2010, the population of the district is estimated to be around 35,667 inhabitants.[2] The district of Tambunan is populated mainly by the indigenous group of Kadazan-Dusun (86%), while the rest of the population are Malay, Chinese and other indigenous groups.