Illinois State Route 161 is a east-west highway across Northern St. Clair County. This is one of the main highway through the Greater-Belleville Area. IL St Rt 161 passes through the following towns in St. Clair County. Fairview Heights
Belleville
Swansea
Mascoutah
New Baden
IL St Rt 161 is multi-plexed in St. Clair County. Illinois State Route 158, near Scott Air Force Base. IL St Rt 161 intersects the following highways in St. Clair County. Illinois State Route 159, in Belleville.
The western end point in Fairview Heights. A junction marker in Fairview Heights. WB IL St Rt 161 in Fairview Heights. WB IL St Rt 161 at North Belt West. A BGS om WB IL St Rt 161. A BGS on WB IL St Rt 161. A BGS on EB IL St Rt 161. EB IL St Rt 161 east of Boul Ave. EB IL St Rt 161 at IL St Rt 159. EB IL St Rt 161 east of IL St Rt 159. EB IL St Rt 161 at Lebanon Ave in Belleville. WB IL St Rt 161 on Sherman in Belleville. EB IL St Rt 161 north of Carlyle Ave in Belleville. EB IL St Rt 161 at West in Belleville. WB IL St Rt 161 on the eastside of Belleville. EB IL St Rt 161 at Greenmont Road. EB IL St Rt 161 at SWIC. EB IL St Rt 161 east of Belleville. EB IL St Rt 161 at north IL St Rt 158. A BGS on SB IL St Rt 158. SB IL St Rt 158/EB IL St Rt 161 near Scott Air Force Base. A junction marker on SB IL St Rt 158/EB IL St Rt 161. A junction marker on SB IL St Rt 158/EB IL St Rt 161. SB IL St Rt 158/EB IL St Rt 161 at south IL St Rt 158. EB IL St Rt 161 north of IL St Rt 158. EB IL St Rt 161 south of Scott Air Force Base. EB IL St Rt 161 east of Scott Air Force Base. A St. Clair County mile marker. EB IL St Rt 161 near Mascoutah Lake. EB IL St Rt 161 at 6th in Mascoutah. EB IL St Rt 161 at IL St Rt 4. A BGS on EB I-64. EB IL St Rt 161 in New Baden.
