what county is dewey az in
Dewey-Humboldt, Arizona. Dewey-Humboldt is a town in Yavapai County, Arizona, United States. The population of the town was 3,894 according to the 2010 census. The Dewey-Humboldt area was a census-designated place (CDP) at the 2000 census, at which time its population was 6,295.