Phoenix and Tucson both made the U.S. News & World Report's list of 150 best places ... the influx of retirees. Has Arizona's median age kept increasing? And which county is the oldest?

Among the 15 counties on our list is Maricopa County, in the southwestern swing state of Arizona. Maricopa County, home to Phoenix, is the politically competitive heart of one of the key ...

Apache, Maricopa, Pima and Yuma counties are among ... were selected. The list includes one or more jurisdiction in each of the seven battleground states: Arizona, Georgia, Michigan, Nevada ...