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 United States Census Bureau, the consolidated population of Indianapolis and Marion County in 2020 was 977,642. 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, Illinois 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 2,048,703 residents. Its combined statistical area ranks 28th, with a population of 2,431,361. Indianapolis covers 368 square miles (950 km2), making it the 16th largest city by land area in the U.S. Indigenous peoples inhabited the area dating to as early as 10,000 BC. In 1818, the Delaware relinquished their tribal lands in the Treaty of St. Mary's. In 1821, Indianapolis was founded as a planned city for the new seat of Indiana's state government. The city was platted by Alexander Ralston and Elias Pym Fordham on a 1-square-mile (2.6 km2) grid next to the White River. Completion of the National and Michigan roads and arrival of rail later solidified the city's position as a manufacturing and transportation hub. Two of the city's nicknames reflect its historical ties to transportation—the "Crossroads of America" and "Railroad City". Since the 1970 city-county consolidation, known as Unigov, local government administration operates under the direction of an elected 25-member city-county council headed by the mayor. Indianapolis anchors the 29th largest economic region in the U.S., based primarily on the sectors of finance and insurance, manufacturing, professional and business services, education and health care, government, and wholesale trade. The city has notable niche markets in amateur sports and auto racing. The city is home to three Fortune 500 companies, two major league sports clubs, four university campuses, and several museums, including the world's largest children's museum. However, the city is perhaps best known for annually hosting the world's largest single-day sporting event, the Indianapolis 500. Among the city's historic sites and districts, Indianapolis is home to the largest collection of monuments dedicated to veterans and war casualties in the U.S. outside of Washington, D.C.
Hamilton County is a county in the U.S. state of Indiana. Census 2010 recorded a population of 274,569. The county seat is Noblesville. Hamilton County is part of the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area. Since the beginning of the 21st century, Hamilton County has been the second most populous county in Central Indiana. Hamilton County's roots are in agriculture. However, after World War II, Indianapolis grew north and towns in the southern part of the county developed as suburbs. Residential and commercial development have replaced many farm fields. The northern part of the county remains largely agricultural. Today, the county is one of the fastest-growing counties in the United States. According to 2007 estimates by the U.S. Census, the county's population increased from an estimated 182,740 in 2000 to 261,661 in 2007, making it the fastest-growing county in Indiana out of 92. Recently, Hamilton County surpassed St. Joseph County in population, making it the state's fourth most populous. It is also the third densest in the state, after Marion and Lake Counties. In 2010, Hamilton County was home to three of the state's 20 largest cities and towns: Carmel (8th), Fishers (9th), and Noblesville (14th). Geist and Morse reservoirs are two man-made lakes in Hamilton County that offer recreational opportunities such as boating, fishing, and waterfront living. In June 2008, Hamilton County was named America's Best Place to Raise a Family by Forbes.com due to its strong economy, affordable living, top-ranked schools, and close proximity to Indianapolis. The city of Carmel in southwestern Hamilton County was designated CNN Money's top place to live in 2013 and in 2017, the city of Fishers was named best place to live.
Anderson, named after Chief William Anderson, is a city in and the county seat of Madison County, Indiana, United States. It is the principal city of the Anderson, Indiana Metropolitan Statistical Area which encompasses Madison County. Anderson is the headquarters of the Church of God (Anderson) and home of Anderson University, which is affiliated with the Christian denomination. Highlights of the city include the historic Paramount Theatre and the Gruenewald Historic House. The population was 56,129 at the 2010 census, down from 70,000 in 1970.