Illinois State Route 40 is a main north-south surface route through the Peoria Area. This connects areas of northeastern Peroai County to Downtown Peoria. IL St Rt 40 passes through the following towns in Peoria County. Peoria
Peoria Heights IL St Rt 40 is not multi-plexed in Peoria County. IL St Rt 40 intersects the following highways in Peoria County. U.S. Rt. 24, at Peoria. Illinois State Route 29, at Peoria.