Tenkiller is an unincorporated community and census-designated place (CDP) in Cherokee County, Oklahoma, United States.

It is bordered to the north by Welling, to the west across the Illinois River by Park Hill and Keys, and to the east by Rocky Mountain in Adair County.

Tahlequah, the county seat, is 13 miles (21 km) to the northwest via Welling Road.

[5] Tenkiller Ferry Lake on the Illinois River occupies the western border of the CDP.

18.7% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older.