Tucson is a city and county seat in Pima County, Arizona, United States, and is home to the University of Arizona. It is the second-largest city in Arizona after Phoenix, with a population of 542,629 according to the 2020 U.S. Census, while the population of the entire Tucson Metropolitan Statistical Area (MSA) is 1,043,433. Nogales Combined Statistics Area (CSA). Tucson and Phoenix anchor the Arizona Sun Corridor. The city is 174 km southeast of Phoenix and 97 km north of the US-Mexico border. Tucson is the 34th largest city and 53rd largest metropolitan area in the United States (2014). Tucson's major incorporated suburbs include the Oro and Marana Valleys to the northwest of the city, Sahuarita to the south of the city, and South Tucson to an enclave south of downtown. Communities near Tucson (some within or between city boundaries) include Casas Adobes, Catalina Foothills, Flowing Wells, Midvale Park, Tanque Verde, Tortolita, and Vail. Cities outside the Tucson metro area include Benson to the southeast, Catalina and Oracle to the north, and Green Valley to the south. Tucson was established by the Spanish as a military fortress when Hugo O'Conor authorized the construction of the Presidio San Agustín del Tucsón in 1775. It was incorporated into the state of Sonora after Mexico gained independence from the Spanish Empire in 1821. The United States acquired an area of ??29,670 square miles (76,840 km2) of present-day southern Arizona and southwestern New Mexico from Mexico as part of the Gadsden Purchase in 1853. Tucson was the capital of the Arizona Territory from 1867 to 1877. Tucson was the largest city in Arizona in terms of population during the territorial and early state periods, until it was surpassed by Phoenix in 1920. However, population growth remained strong until the end of the 20th century. Tucson was the first American city to be designated a "City of Food" by UNESCO in 2017. The city's Spanish name, Tucsón [tuk?son], is derived from O'odham Cuk ?on, meaning "(at) the foot of the black [hill]", referring to a present-day basalt-covered hill. called Sentinel Peak. Tucson is sometimes referred to as Old Pueblo and the Valley of Optics, the latter referring to its world-famous telescope and optical science. Find and hire a top agency or company for your next big project related to Digital Marketing, Advertising, Social Media Marketing, Content Writing, Market Research, PR, Email Marketing, Mobile App Development, Web Design, Web application development, Media Planning and many more in the USA and other countries on AgencyNetwork.