Lat/Long: 39.9333, -91.4000
The Illinois General Assembly established Adams County in 1825, and Quincy became the county seat. In the 1830s and 1840s, there was a concerted, albeit unsuccessful, effort to relocate the county seat from Quincy to Columbus. The Illinois General Assembly officially incorporated Quincy as a town in 1839 and as a city the following year. The sixth of the seven Lincoln-Douglas debates took place in Quincy on October 13, 1858.
Sec. 2 of “An Act Forming New Counties out of the Counties of Pike and Fulton, and the Attached Parts Thereof,” 13 January 1825, Laws of Illinois (1825), 92-96; History of Adams County, Illinois (Chicago: Murray, Williamson and Phelps, 1879), 261, 285-88; An Act to Remove the Seat of Justice of Adams County; An Act to Authorize the Removal of the Seat of Justice of Adams County; An Act to Incorporate the Town of Quincy; An Act to Incorporate the City of Quincy; Sixth Debate with Stephen A. Douglas, at Quincy, Illinois.