La Salle County, Illinois
County: La Salle
Lat/Long: 41.3500, -88.8833
In 1831, the Illinois legislature created La Salle County out of Putnam and Tazewell counties, and they designated Ottawa as the county seat.
"An Act to Create and Organize the Counties therein Named,"15 January 1831, Laws of Illinois (1831), 54-57.