WMDR-FM (88.9 MHz) is a non-commercial, listener-supported FM radio station licensed to Oakland, Maine.

WMDR-FM broadcasts a southern gospel and Christian country radio format for the Augusta-Waterville, Lewiston-Auburn, Norway-South Paris and Bath-Brunswick areas, as well as parts of Downeast Maine and Northern New Hampshire.

It was founded by Ray and Susanne Bouchard who began the Worship Radio Network in 2004 when a friend donated the parent station, WMDR (1340 AM) in Augusta.

Meanwhile, WMDR-FM's contemporary format moved to WWWA, while WMDR 1340 AM began airing children's Christian programming.

In 2010, WMDR-FM boosted its power to 100,000 watts as a Class C station, greatly expanding its coverage area.