WRCJ-FM (90.9 MHz) is a listener-supported, non-commercial radio station in Detroit, Michigan, broadcasting classical music and jazz.

The license is held by the Detroit Classical and Jazz Educational Radio LLC, which is owned by the Stanley and Judith Frankel Family Foundation.

It transmits from a tower at 710 feet (220 meters) height above average terrain (HAAT) near the corner of Eight Mile and Meyers roads in Oak Park, shared with other Detroit FM and TV stations, including WTVS, WMYD, and WWJ-TV.

WDTR changed its call sign to WRCJ on July 1, 2004, and the station cut back its broadcast time to 8 AM to 5 PM weekdays only.

Regular program hosts include Dave Wagner, Peter Whorf, Christa Grix, Maxine Michaels, John Penney and Linda Yohn.