Indianapolis, colloquially known as Indy, is the state capital and most populous city of the U.S. state of Indiana and the seat of Marion County. According to the U.S. Census Bureau, the consolidated population of Indianapolis and Marion County was 977,203 in 2020. The “balance” population, which excludes semi-autonomous municipalities in Marion County, was 887,642. It is the 15th most populous city in the U.S., the third-most populous city in the Midwest, after Chicago and Columbus, Ohio, and the fourth-most populous state capital after Phoenix, Arizona, Austin, Texas, and Columbus. The Indianapolis metropolitan area is the 33rd most populous metropolitan statistical area in the U.S., with 2,111,040 residents. Its combined statistical area ranks 28th, with a population of 2,431,361. Indianapolis covers 368 square miles (950 km2), making it the 18th largest city by land area in the U.S.

The name Indianapolis is derived from the state’s name, Indiana (meaning “Land of the Indians”, or simply “Indian Land”), and polis, the Greek word for “city.” Jeremiah Sullivan, justice of the Indiana Supreme Court, is credited with coining the name. Other names considered were Concord, Suwarrow, and Tecumseh.

According to the U.S. Bureau of Labor Statistics, the largest industries by employment in the Indianapolis metropolitan area are trade, transportation, and utilities; professional and business services; education and health services; government; leisure and hospitality; and manufacturing, respectively. The region’s unemployment rate was 1.2 percent in December 2021. The city’s major exports include pharmaceuticals, motor vehicle parts, medical equipment and supplies, engine and power equipment, and aircraft products and parts.

According to the Federal Reserve Bank of St. Louis, the gross domestic product (GDP) of the Indianapolis metropolitan area was $147 billion.

The Indianapolis Colts of the National Football League (NFL) have been based in the city since relocating from Baltimore in 1984. The Colts’ tenure in Indianapolis has produced 11 division championships, two conference championships, and two Super Bowl appearances. Pro Football Hall of Famer Peyton Manning led the team to win Super Bowl XLI in the 2006 NFL season. Lucas Oil Stadium replaced the team’s first home, the RCA Dome, in 2008.

Indianapolis is a major center for motorsports. Two auto racing sanctioning bodies are headquartered in the city (INDYCAR and United States Auto Club) along with more than 500 motorsports companies and racing teams, employing some 10,000 people in the region. Indianapolis or Indy is a metonym for auto racing, used for both the competition and type of car used in it.