WFDU (89.1 MHz branded 89.1 WFDU) is a public radio station licensed to Fairleigh Dickinson University in Teaneck, New Jersey.

[2] Founded in 1971, WFDU's studios are on campus, with its transmitter on the Armstrong Tower in Alpine, New Jersey.

While WFDU and WNYU-FM share the frequency, each station maintains separate transmitter and studio facilities as well as discrete programming and personnel.

The station's broadcast signal has up to a 60-mile radius of its transmitter within the historic Armstrong Field Lab in Alpine.

With an increase in antenna height and a power rise to 3,000 watts, WFDU-FM has the potential to reach 8.2 million people.