Lat/Long: 39.8000, -89.6333
In 1821, the Illinois legislature created Sangamon County and the already-established village of Springfield was chosen as its county seat. In 1837, the legislature, with Abraham Lincoln as a member, voted to move the state capital from the southern town of Vandalia to the more centrally-located Springfield. State government took up residence in the new state capitol building in 1839. Springfield was Abraham Lincoln's home from 1837 to 1861.
Illinois House Journal. 1836. 10th G.A., 1st sess. 752-58; An Act Permanently to Locate the Seat of Government of the State of Illinois; History of Sangamon County, Illinois (Chicago: Inter-State, 1881), 47, 563-64.