Downtown Indianapolis monument circle

Indianapolis  /ˌɪndiəˈnæpɵlɨs/ (abbreviated Indy /ˈɪndi/) is the capital of the US state of Indiana, and the county seat of Marion County, Indiana. As of the 2010 United States Census, the city's population is 829,718. It is Indiana's largest city and, as of the 2010 U.S. Census, is the 12th largest city in the U.S., the second largest city in the Midwest (behind Chicago), the second most populous state capital (after Phoenix, Arizona), and the most populous state capital east of the Mississippi River. Indianapolis is also one of the fastest growing regions in the United States.