Bloomington is a city in and the county seat of Monroe County, Indiana, United States. The population was 79,168 at the 2020 census. It is the seventh-most populous city in Indiana and the fourth-most populous outside the Indianapolis metropolitan area. It is the home of Indiana University Bloomington, the flagship campus of the Indiana University system. Established in 1820, IU Bloomington enrolls over 45,000 students.

Monroe County is a county in the U.S. state of Indiana. In 1910 the US Census Bureau calculated the nation's mean population center to lie in Monroe County. The population was 139,718 at the 2020 United States Census. The county seat is Bloomington. Monroe County is part of the Bloomington, Indiana, Metropolitan Statistical Area.