Tewantin (/təˈwɒntən/ tə-WON-tən) is a town and locality in the Shire of Noosa, Queensland, Australia. Tewantin was the original settlement in the Noosa region and is one of its three major centres today. In the 2021 census, the locality of Tewantin had a population of 11,164 people.

The locality is bounded to the north by Lake Cooroibah and to the east by the Noosa River which flows into the lake.

Most of the locality is within protected areas with the Great Sandy National Park in the north of the locality, Tewantin National Park in the north-west, west, south-west, and south of the locality, with the Harry Springs Conservation Park in the centre of the locality. The town is in the east of the locality with Doonella Lake in the south-east.

The Cooroy-Noosa Road enters from the west (Tinbeerwah) and terminates in the town.

The name Tewantin is an anglicised version of the Aboriginal name for the area, dauwadhum, meaning place of dead logs, because of the sawmill there.

Tewantin was originally a timber town. In 1869, Tewantin was the river port for the Noosa area. In 1871, Clarendon Stuart surveyed a town site for the Tewantin settlement. Tewantin was a thriving small town with a reliance on the gold, fishing and timber industries.

Tewantin Provisional School opened on 2 August 1875. On 25 April 1887, it became Tewantin State School.

On 1 April 1910, Dr Henry Youngman officiated at the opening of the Tewantin Methodist Church.