Macoupin County, Illinois
Lat/Long: 39.2667, -89.9333
In 1829, the Illinois General Assembly created Macoupin County out of Greene County. Later that year, commissioners appointed for the purpose chose a site for the county seat, and the county commissioners' court named it Carlinville.
"An Act Creating the County of Macoupin," 17 January 1829, Revised Laws of Illinois (1829), 26-28; John M. Peck, A Gazetteer of Illinois in Three Parts 2nd ed. (Philadelphia, PA: Grigg & Elliott, 1837), 117; History of Macoupin County, Illinois (Philadelphia: Brink, McDonough, 1879), 40-41.