Population of Counties in (2018)

Name 2018 Population Growth Since 2010
Maricopa County4,307,03312.61%
Pima County1,022,7694.20%
Pinal County430,23713.37%
Yavapai County228,1688.15%
Yuma County207,5345.28%
Mohave County207,2003.44%
Coconino County140,7764.58%
Cochise County124,756-5.33%
Navajo County108,9561.17%
Apache County71,606-0.32%
Gila County53,501-0.13%
Santa Cruz County46,212-2.56%
Graham County37,4660.83%
La Paz County20,6010.53%
Greenlee County9,45513.48%