Sometimes referred to as "The Old Pueblo," Tucson has a population of 520,116 people, which makes it the second-largest in Arizona. The Tucson Metro includes areas such as Catalina Foothills, Casas Adobes, and Oro Valley. It covers over two hundred square miles and is home to nearly a million residents.
Nicknamed the "Optics Valley," Tucson is home to over 150 companies involved in the design and manufacturing of optics and optoelectronics systems. Additionally, Tucson claims the significant presence of many high-tech industries as the foundation of a growing, healthy economy.