The fairgrounds was created in 1905, when a volunteer organization, the Arizona Territorial Fair Association, purchased the property and first developed it. At that time, Arizona was not yet a state and had territory status. In 1909, the grounds were purchased by the Territorial Fair Commission, which became the State Fair Commission after statehood in 1912.
Facilities
The fairgrounds site includes the following buildings:
The Party Gras, originally the Gem and Mineral Building — a historic 4,176 sq.ft. building built in 1918 to showcase mineral specimens from Arizona's extensive mining industry. The building's interior has a vaulted beamed ceiling, and large skylight above a wrap-around balcony. It is the oldest building at the fairgrounds.
Grandstand — a 1936-1937 WPA grandstand project with 5,000 covered seats, that replaced an older wooden structure that had burned down. The exterior of the grandstand has 23 bas-relief panels by David Carrick Swing and Florence Blakeslee, that were funded by the Federal Art Project. The Grandstand Arena is a historical outdoor area, is used for open-air evens such as horse shows, dirt track events, mud bog spectaculars, races, rodeos, tractor pulls, and demolition derbies.
The Hacienda de Mexico — a 12,546 sq.ft. covered mall.
The Home Arts Center — a 13,584 sq.ft. building.
The Agriculture Center — two building totaling 61,000 sq. ft. designed to accommodate large shows and exhibits, including livestock
Wesley Bolin Building — an almost 20,000 sq.ft. exhibit space
Arizona Plaza — a 17,184 sq.ft. adobe style complex.
Exhibit Building — a 50,000 sq.ft. building used for large shows and commercial exhibits.
WPA Administration Building
The WPA Administration Building was completed in 1939 in the PWA Moderne style. More recently it had been allowed to deteriorate, and was set for demolition in July 2014, before historic preservationists sought to stop the demolition and were granted a temporary restraining order by the Maricopa CountySuperior Court. They were given until April 14, 2016, to raise $120,000 towards preservation of the building. They succeeded, on 8 April 2016the project was awarded a historic preservation grant of $120,000 by the Phoenix City Council and a $80,000 grant by the Phoenix IDA, a provider of private activity bonds for projects that give a public benefit.