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.
Overgaard was settled in the 1930’s and was named after the owner of the first sawmill. It was originally called Oklahoma Flats. Tourism, retirement and timbering are the foundations of Heber-Overgaard's economy.
Heber-Overgaard is located at (34.413157, -110.564393).
According to the United States Census Bureau, the CDP has a total area of 6.9 square miles (18.0 km²), all of it land.
In 2002 the Rodeo-Chediski fire was a wildfire that burned in Heber-Overgaard beginning on June 18, 2002, and was not controlled until July 7. It was the worst forest fire in Arizona to date, consuming .
There were 1,154 households out of which 22.4% had children under the age of 18 living with them, 62.4% were married couples living together, 4.9% had a female householder with no husband present, and 29.9% were non-families. 24.3% of all households were made up of individuals and 12.1% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.79.
In the CDP the population was spread out with 21.6% under the age of 18, 5.1% from 18 to 24, 19.3% from 25 to 44, 31.6% from 45 to 64, and 22.4% who were 65 years of age or older. The median age was 48 years. For every 100 females there were 105.1 males. For every 100 females age 18 and over, there were 104.5 males.
The median income for a household in the CDP was $28,665, and the median income for a family was $35,380. Males had a median income of $28,889 versus $22,750 for females. The per capita income for the CDP was $15,596. About 11.7% of families and 16.4% of the population were below the poverty line, including 25.6% of those under age 18 and 5.4% of those age 65 or over.
Mountain Meadows Primary School, Capps Elementary School, Mogollon Junior High School, and Mogollon High School serve the community.