Wilhoit is a census-designated place in Yavapai County, Arizona, United States. The population was 664 at the 2000 census. In the mid-1920s, a road was being built to connect Phoenix and Prescott, by way of Congress and Yarnell. There, a man by the name of Frank Wilhoit built culverts for the road, and then later homesteaded that area with his wife, Christin…Wilhoit is a census-designated place in Yavapai County, Arizona, United States. The population was 664 at the 2000 census. In the mid-1920s, a road was being built to connect Phoenix and Prescott, by way of Congress and Yarnell. There, a man by the name of Frank Wilhoit built culverts for the road, and then later homesteaded that area with his wife, Christina. The Wilhoit family then built a gas station and garage on one side of the road, and a restaurant on the other. Mr. Wilhoit operated the garage and Mrs. Wilhoit operated the restaurant which remained busy, as foreigners to the town needed a place to eat, and that they also needed an auto-garage considering tires in the 1920s did not hold up well on gravel roads. Mr. and Mrs. Wilhoit would later leave the area and move to Wickenburg around 1930, but the small area retained the name and the area later evolved into a place well known for its mobile homes.