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The population of Tucson, Arizona on January 1st 2011 is approximately 543,910. (Extrapolated from a 2000 US census population of 486,699 and a population of 543,910 on January 9th 2011.)
What's the population of Tucson, the county seat of Pima County, Arizona, United States, located 118 miles (188 km) southeast of Phoenix and 60 miles (98 km) north of the U.S.-Mexico border in 2011?