Red Valley is an unincorporated community located within Upper Freehold Township in Monmouth County, in the U.S. state of New Jersey. The settlement is located at the intersection of County Route 526 and Red Valley Road (south) and Yellow Meetinghouse Road (north) near the township's eastern border with Millstone Township. Except for some single-family houses located along the roads in the area, the area is primarily made up of farmland.