Indianapolis , officially the City of Indianapolis and Marion County, is the capital and largest city of the U.S. state of Indiana and the seat of Marion County.

It is in the East North Central region of the Midwestern United States. With an estimated population of 853,173 in 2015, Indianapolis is the second most populous city in the Midwest, after Chicago, and 14th largest in the U.S.

 The city is the economic and cultural center of the Indianapolis metropolitan area, home to 2 million people, the 34th most populous metropolitan statistical area in the U.S. Its combined statistical area ranks 26th, with 2.4 million inhabitants.

Indianapolis covers 372 square miles (963.5 km²), making it the 16th largest city by land area in the U.S.