Illinois State Route 157 runs north-south along the Mississippi River bluffs in St. Clair County. Mort of this highways runs along Interstate 255 in the Metro-East Area of the St. Louis Area. IL St Rt 157 passes through the following towns in St. Clair County. Collinsville Caseyville
East St. Louis
Cahokia Heights (former Village of Alorton, Village of Cahokia, Village of Centreville; prior to May, 2021)
SB IL St Rt 157 at the Madison/St. Clair County Line. SB IL St Rt 157 near Caseyville Road. A St. Clair County mile marker. NB IL St Rt 157 at I-64/U.S. Rt. 50. A BGS on EB I-64/U.S. Rt. 50. A BGS on EB I-64/U.S. Rt. 50. A BGS on EB I-64/U.S. Rt. 50. A BGS on EB I-64/U.S. Rt. 50. A BGS on WB I-64/U.S. Rt. 50. A BGS on WB I-64/U.S. Rt. 50. A BGS on WB I-64/U.S. Rt. 50. NB IL St Rt 157 in Caseyville. A guide marker in Fairview Heights. SB IL St Rt 157 along Belleville/East St. Louis. SB IL St Rt 157 south of State Street in East St Louis. A BGS on WB IL St Rt 15. A BGS on EB IL St Rt 15. A BGS on WB IL St Rt 15. A BGS on WB IL St Rt 15. NB IL St Rt 157 at EB IL St Rt 13. WB IL St Rt 13/SB IL St Rt 157 in Centreville. A junction marker on SB IL St Rt 163. NB IL St Rt 157/163 south of IL St Rt 13. SB IL St Rt 157/163 in former Centreville. NB IL St Rt 157/163 north of SB IL St Rt 163. NB IL St Rt 157 south of IL St Rt 163. SB IL St Rt 157 in Cahokia. A BGS on SB I-255/WB U.S. Rt. 50. A BGS on NB I-255/EB U.S. Rt. 50. A BGS on SB I-255/WB U.S. Rt. 50. A BGS on SB I-255/WB U.S. Rt. 50. A BGS on NB I-255/EB U.S. Rt. 50. A BGS on NB I-255/EB U.S. Rt. 50. A BGS on NB I-255/EB U.S. Rt. 50. A junction marker on NB IL St Rt 3. The southern end of IL St Rt 157. The southern end marker. The southern end marker.
