| Group: | Tambanuo people Tombonuo / Tambanua / Paitan |
| Population: | 15 0000 |
| Popplace: |  |
| Langs: | Tambanuo, Sungai, Malay |
| Rels: | Islam (majority), Christianity, Animism |
| Related: | Orang Sungai, Kadazan-Dusun |
The Tambanuo (or Tombonuo) people are an indigenous ethnic group residing in Sabah, Malaysia. They primarily reside in the Beluran district of the Sandakan Division as well as Kota Marudu and Pitas districts of Kudat Division of Sabah. Their population was estimated at 20,000 in the year 1990. They are considered a sub-group of the Orang Sungai, and their language (ISO 639-3 txa) belongs to the Paitanic branch of the Austronesian language family.