Illinois State Route 78 is the main north-south route through eastern Henry County. IL St Rt 78 passes through the following towns in Henry County. Kewanee
Annawan
IL St Rt 78 is multi-plexed in Henry County. U.S. Rt. 34, near Kewanee.
Junction sign on northern Henry County. Henry County Mile Marker on IL St Rt 78. A BGS on EB I-80. NB IL St Rt 78 in Annawan. SB IL St Rt 78 south of Annawan. SB IL St Rt 78 north of Kewanee. SB IL St Rt 78 near Pizza Hut Field in Kewanee. EB U.S. Rt. 34/SB IL St Rt 78 in Downtown Kewanee.