About Tonica, Illinois
"Tonica" redirects here. For the concealer moth genus, see Tonica (moth).Coordinates: 41°12?57?N 89°4?5?W? / ?41.21583°N 89.06806°W? / 41.21583; -89.06806Tonica is a village in LaSalle County, Illinois, United States. The population was 685 at the 2000 census. It is part of the Ottawa?Streator Micropolitan Statistical Area.Tonica is mainly farmland, with a few businesses. It has its own grade school, Tonica Grade School (K-8), with approximately 194 students enrolled.