Austin (/ˈɒstɨn/ or /ˈɔːstɨn/) is the capital of the U.S. state of Texas and the seat of Travis County. Located in Central Texas on the eastern edge of the American Southwest, Austin is the 13th most populous city in the United States of America and the fourth most populous city in the state of Texas. It was the third-fastest-growing large city in the nation from 2000 to 2006. Austin is also the third largest state capital in the United States after Phoenix and Indianapolis. Austin has a population of 820,611 (2011 estimate). The city is the cultural and economic center of the Austin–Round Rock–San Marcos metropolitan area, which had an estimated population 1,783,519 (2011 U.S. Census), making it the 34th-largest metropolitan statistical area in the United States and the fourth-largest in Texas.