KTNN (660 AM) is a Navajo language radio station in Window Rock, Arizona, the seat of the government of the Navajo Nation.

It also broadcasts high school basketball games from the local high schools on the Navajo Reservation.

Most of its announcers are bilingual and broadcast in Navajo and English.

[6] At night the station uses a directional antenna to protect, as required by Federal Communications Commission (FCC) rules, the signal of WFAN at New York City, since WFAN is a Class A (formerly Class I-A) station broadcasting on 660 kHz and KTNN is Class B (formerly Class II-A).

[6] Its programming is also heard on KTNN-FM (101.5) in Tohatchi, New Mexico.