Tucson, Arizona
Located 118 miles (188 km) southeast of Phoenix, Tucson is the county seat of Pima County, Arizona. It has an urban population of 521,605, according to a 2004 census estimate, with a total of 931,210 residents living in its greater metropolitan area. This number is growing quickly, and expected to surpass 1 million in 2007.
Phoenix, Arizona
The city of Phoenix is county seat of Maricopa County, as well as capital and largest settlement in the U.S. state of Arizona. The city itself has a population of 1,416,055, according to the 2000 census, although it is estimated to have grown significantly in population since then. The metropolitan region, meanwhile, had 3,251,876 residents in 2000, with current population estimates ranging around 3,790,000.