Heber-Overgaard is a census-designated place (CDP) in Navajo County, Arizona, United States. Situated atop the Mogollon Rim, the community lies at an elevation of around 6,500 feet (2,000 m). The population was 2,722 at the 2000 census. Heber was founded in 1876 or 1877, by members of The Church of Jesus Christ of Latter-day Saints (Mormons), and the town is named after Heber J. Grant, a prominent Mormon. The Heber post office was established in 1890.