According to the Yukon Geographical Names Project, "Teslin" means "long water",[1] but in the Tlingit language the local kwaan or tribe of Tlingit is called Deisleen Kwáan", meaning "Big Sinew Tribe".

On the Yukon portion of the lake there are three First Nation communities: Nisutlin Indian Reserve No.

The latter is centred in the Village of Teslin, which is located where the Alaska Highway meets the lake, following its northern/eastern shore from there towards Whitehorse.

The Nisutlin Plateau limns the eastern side of the lake north of the mouth of the Teslin River and extends into Yukon.

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