Tucson city is the seat of the County of Pima in Arizona State and the home of Arizona University. According to the national census that was carried out in year 2010 in USA, the population of Tucson was reported to be 520,116, whereas the estimated population in 2015 of the whole Tucson MSA (Metropolitan Statistical Area) was 980,263. The Metropolitan Statistical Area of Tucson is part of Tucson- Nogales CSA (Combined Statistical Area), having a population of about 1.01 million according to the census of 2010. Tucson city is the 2nd most populous city in the State of Arizona after Phoenix city. It is located 174 km (108 miles) south east of phoenix city and 97 km (60 miles) north of Mexico- USA border. In addition, Tucson city is the 58th biggest metropolitan area and 33rd biggest city in USA (2014).