All Counties in Arizona RankCountyValue 1 Maricopa County, AZ 4,430,871 2 Pima County, AZ 1,042,393 3 Pinal County, AZ 433,338 4 Yavapai County, AZ 237,83011 more rows
Today Maricopa County measures 9,222 square miles, 98 square miles of which is water. Twenty-nine percent of this area is owned individually or by corporation, and 28 percent is owned by the U.S. Bureau of Land Management.
Phoenix is the seat of Maricopa County, the state capital, and the largest city in the state.
Territorial capitol moves from its provisional site at Camp Whipple to Prescott; Original four counties are created (Yuma, Yavapai,Pima and Mohave).
Adjacent counties La Paz County – west. Yuma County – west. Pima County – south. Pinal County – southeast and south. Gila County – east. Yavapai County – north.