The 1937 Main Building

Historical marker location:

408 W Main St, Collinsville, Illinois

( Marker is on West Main Street just east of North Guernsey Street, on the right when traveling east.)

Marker installed: 2015

The Illinois State Police, founded in 1922, is one of the oldest state police agencies in the United States. The agency is responsible for enforcing state laws, protecting state property, and providing security for the governor and other state officials.