Yavapai County is a county near the center of the U.S. state of Arizona. As of the 2020 census, its population was 236,209, making it the fourth-most populous county in Arizona. The county seat is Prescott. Yavapai County comprises the Prescott Valley-Prescott, AZ Metropolitan Statistical Area as well as the northern portions of Peoria and Wickenburg, the balance of which are in the Phoenix Metropolitan Area.