South Tucson is a city in Pima County, Arizona, United States and an enclave of the much larger city of Tucson. South Tucson is known fo…South Tucson is a city in Pima County, Arizona, United States and an enclave of the much larger city of Tucson. South Tucson is known for being heavily influenced by Hispanic, and especially Mexican, culture; restaurants and shops which sell traditional Mexican food and other goods can be found throughout the city. According to the 2010 census, the population of the city is 5,652.