Tahltan is the name of a Northern Athabaskan people in northwestern British Columbia, and also the name of their language. It may also refer to:

• the Tahltan Nation, a tribal council
• the Tahltan First Nation, one of the two member band governments of that tribal council
• the Tahltan River
  • the Upper Tahltan River
• Tahltan, British Columbia, at the confluence of the Stikine and Tahltan Rivers.
  • Tahltan Indian Reserve No. 1, at Tahltan, BC
  • Tahltan Forks Indian Reserve No. 5, at Tahltan, BC
  • Upper Tahltan Indian Reserve No. 4, near Tahltan, BC
  • Tahltan Indian Reserve No. 10, NE of Tahltan BC at the confluence of the Stikine and Klastline Rivers.
• the Tahltan Highland, a landform in the region