Nahanni Butte (/nəˈhæni/ nə-HAN-ee; Slavey language: Tthenáágó [t̪θɛnáːkó] "strong rock") is a "Designated Authority"[6] in the Dehcho Region of the Northwest Territories, Canada.

The community is located at the confluence of the Liard and South Nahanni Rivers in the southwestern part of the NWT.

Access from there is by river taxi in summer and ice road in winter; there are no plans for a vehicle ferry.

In the 2021 Census of Population conducted by Statistics Canada, Nahanni Butte had a population of 81 living in 33 of its 39 total private dwellings, a change of -6.9% from its 2016 population of 87.

[1] The Dene of the community are represented by the Nahɂą Dehé Dene Band and belong to the Dehcho First Nations.