Teslin is the anglicized form of the name of the Deisleen Ḵwáan ("Big Sinew Tribe") of the Tlingit people, one of two ḵwáan that are today incorporated as the Teslin Tlingit Council government in the Yukon Territory of northern Canada. As a term it may also refer to:
- Geography
- Settlements
- Teslin, Yukon, a village in Yukon, Canada
- Teslin Lake, Yukon, an unincorporated area in Yukon, Canada
- Teslin River, Yukon, an unincorporated area in Yukon, Canada
- Little Teslin Lake, Yukon, an unincorporated area in Yukon, Canada
- Teslin Crossing, an unincorporated area in Yukon, Canada
- Teslin Lake Indian Reserve No. 7, an Indian Reserve of the Taku River Tlingit government in British Columbia
- Teslin Lake Indian Reserve No. 9, an Indian Reserve of the Taku River Tlingit government in British Columbia
- Other