Bloomington is a city in and the county seat of McLean County, Illinois, United States. It is adjacent to Normal, and is the more populous of the two principal municipalities of the Bloomington-Normal metropolitan area. Bloomington is 135 miles (217 km) southwest of Chicago, and 162 miles (261 km) northeast of St. Louis. The 2010 Census showed the city had a population of 76,610, making it the 12th most populated city in Illinois, and the fifth-most populous city in the state outside the Chicago Metropolitan Area. Combined with Normal, the twin cities have a population of roughly 130,000. Bloomington is home to the corporate headquarters of State Farm Insurance and Country Financial.
Bloomington is located at 40°29′03″N 88°59′37″W. The city is at an elevation of 797 feet (243 m) above sea level. According to the 2010 census, Bloomington has a total area of 27.229 square miles (70.52 km2), of which 27.22 square miles (70.50 km2) (or 99.97%) is land and 0.009 square miles (0.02 km2) (or 0.03%) is water.
In recent years, average temperatures in the county seat of Bloomington have ranged from a low of 14 °F (−10 °C) in January to a high of 86 °F (30 °C) in July, although a record low of −23 °F (−31 °C) was recorded in January 1985 and a record high of 114 °F (46 °C) was recorded on July 15, 1936 during the 1936 North American heat wave. Average monthly precipitation ranged from 1.71 inches (43 mm) in February to 4.52 inches (115 mm) in May.
The Bloomington area was at the edge of a large grove occupied by the Kickapoo people before the first Euro-American settlers arrived in the early 1820s.