Mesa del Caballo, Arizona Mesa del Caballo is a census-designated place in Gila County, Arizona, United States. The population was 765 at the 2010 census.GeographyThe CDP is located in northern Gila County atop Houston Mesa, a low ridge north of Payson. The center of Payson is south via Houston Mesa Road and Arizona State Route 87. According to the United States Census Bureau, the CDP has a total area of, all land.TransportationThe Payson Senior Center operates the Beeline Bus, which provides local bus service between Payson and Mesa del Caballo.EducationIt is in the Payson Unified School District. Payson High School is the zoned comprehensive high school.