Santa Cruz County is a small, diverse county that sits on the border with Sonora, Mexico. Its history, people, culture and commerce are heavily influenced by its relationship with neighboring Sonora, México. Nogales, Arizona is the largest city with a population of 32,262, but it is dwarfed by its sister city across the fence, (Nogales, Sonora) that has a bulging population of 350,000. The quiet communities of Patagonia, Sonoita and Elgin are a sharp contrast to the bustling commerce of Nogales and Rio Rico.