Iowa is a state in the Midwest. It is bordered by 6 states. It is bordered by Wisconsin to the northeast, Illinois to the east and southeast, Missouri to the south, Nebraska to the west, South Dakota to the northwest, and Minnesota to the north. In colonial times, Iowa was a part of French Louisiana and Spanish Louisiana. The flag of Iowa is patterned after the flag of France. After the Louisiana Purchase, people laid the foundation for an agriculture-based economy in the heart of the Corn Belt. In the latter half of the 20th century, Iowa's agricultural economy made the transition to a diversified economy of advanced manufacturing, processing, financial services, information technology, biotechnology, and green energy production. Iowa is the 26th most extensive in total area and the 31st most populous of the 50 U.S. states with a population of 3,190,369 according to the 2020 census. Des Moines is the states capital, most populous city, and largest metropolitan area. The state draws large political crowds as every four years, the Iowa caucus is considered the start of the presidential primary elections.