Starting in 1916, the fair was managed by the Orange County Farm Bureau. An Orange County Fair Board was elected in 1925, and the fair was moved to Anaheim with the addition of a rodeo and carnival. From 1932 to 1939, the fair was located in Pomona, California as part of a combined Orange, Los Angeles, and Riverside County Fair. Following World War II the 32nd District Agricultural Association was formed by the state of California, and it took on the task of running the fair. The state purchased land from the Santa Ana Army Air Base and set some of it aside for use as a new fairgrounds. In 1949 the fair became a five-day-long event and was relocated to the old army base, which quickly became the permanent location.