Barber Peak is a 5,778-foot (1,761-meter) elevation volcanic plug located on Navajo Nation land in San Juan County of northwest New Mexico, United States.

Barber Peak is one of the phreatomagmatic diatremes of the Four Corners area, and with significant relief as it rises 300 feet (91 meters) above the high-desert plain.

Barber Peak is set in the northeastern part of the Navajo Volcanic Field, a volcanic field that includes intrusions and flows of minette and other unusual igneous rocks which formed around 30 million years ago during the Oligocene.

[5] In the Navajo language, this geographical feature is called Tsé Naajin, meaning "black downward rock.

[7] Precipitation runoff from this feature drains into the San Juan River drainage basin.