Lat/Long: 40.534327, -89.357603
In 1827, Mackinaw was established as the first county seat of Tazewell County. It remained the county seat until 1831, when the seat was moved to Pekin. The Illinois General Assembly incorporated the town in 1840.
History of Tazewell County Illinois (Chicago: Chas. C. Chapman, 1879), 208, 225, 244; An Act Amending "An Act Creating the County of Tazewell," and the Several Acts Supplemental Thereto; An Act to Incorporate the Towns Therein Named.