McLean County, Illinois
Lat/Long: 40.4833, -88.8333
The Illinois General Assembly created McLean County in 1830, out of the eastern part of Tazewell County and territory east of it. Originally much larger, land was taken away to form Livingston County in 1837, DeWitt County in 1839, and Woodford County in 1841. Bloomington has been the seat since the county's creation.
"An Act Creating M'Lean County," 25 December 1830, Laws of Illinois (1831), 57-59; An Act to Establish the County of Livingston; An Act for the Formation of De Witt County; An Act for the Formation of the County of Woodford; Origin and Evolution of Illinois Counties (Springfield: Illinois Secretary of State, 2010), 9, 10.