Interstate 64 in Illinois Information
I-64 highlighted in red
|Maintained by IDOT|
|Length||130.4 mi  (209.9 km)|
|West end||I-55 / I-64 / US 40 at Missouri state line|
|East end||I-64 at Indiana state line|
|Counties||St. Clair, Clinton, Washington, Jefferson, Wayne, White|
Interstate 64 (I-64) in the U.S. state of Illinois is a major east–west Interstate highway that runs from the St. Louis metropolitan area east to the Indiana state line near Grayville, Illinois. It travels a distance of 130.4 miles (209.9 km). 
I-64 enters Illinois running concurrently with I–55 and U.S. Route 40 (US 40) over the Mississippi River on the Poplar Street Bridge. After splitting from these highways in East St. Louis, I-64 turns southeasterly and proceeds through St. Clair County towards the Belleville area travelling through the eastern/southeastern St. Louis suburbs of Caseyville, Fairview Heights, O'Fallon, and Shiloh, where the interstate skirts the northern edge of Scott Air Force Base and MidAmerica St. Louis Airport and provides access to Mascoutah and Lebanon via IL Route 4. A new interchange at Rieder Road was completed in September 2017 to create better access to Scott Air Force Base.  As part of the new interchange, a third lane in each direction, a wide left shoulder to accommodate a future fourth lane in each direction, and a center jersey barrier was added from one-mile west of Air Mobility Drive/IL Route 158 to Rieder Road.
At the St. Clair and Clinton county line, the Interstate passes the exurb of New Baden, after which it crosses the southern boundary of Clinton County and leaves the St. Louis metropolitan area. It then traverses a rural part of Illinois through Washington and Jefferson counties, which has no adjacent cities or major intersections passing it reaches the city of Mount Vernon in Jefferson County, where it has a short concurrency with I-57. Mount Vernon is the only major city and intersection served by I-64 in Illinois outside of the St. Louis metropolitan area.   Past Mount Vernon, the Interstate enters another rural stretch through parts of Jefferson, Wayne, and White counties before crossing the Wabash River into Indiana. 
|County||Location ||mi ||km||Exit||Destinations||Notes|
|Mississippi River||0.0||0.0||I-55 south / I-64 west / US 40 west – St. Louis, Memphis||Continuation into Missouri|
|Poplar Street Bridge|
|St. Clair||East St. Louis||0.6||0.97||1||IL 3 south / Great River Road south – Cahokia||Western end of IL 3/GRR concurrency|
|0.9||1.4||—||13th Street and Tudor Avenue||Unnumbered exit |
|1.3||2.1||—||Barack Obama Avenue – Business District||Unnumbered exit |
|2.5||4.0||2||I-55 north / I-70 east / US 40 – Chicago, Indianapolis||Eastern end of I-55/US 40 concurrency, exit 3A eastbound|
|2.7||4.3||3||IL 3 north / Great River Road north (St. Clair Avenue)||Eastern end of IL 3/GRR concurrency|
|3.3||5.3||4||Baugh Avenue/18th Street||Baugh Avenue westbound, 18th Street eastbound|
|Washington Park||5.8||9.3||6||IL 111 (Kingshighway)|
|Caseyville||7.1||11.4||7||I-255 / US 50 west – Memphis, Chicago||Western end of US 50 concurrency I-255 exit 20|
|8.4||13.5||9||IL 157 (Bluff Road) – Caseyville, Centreville|
|Fairview Heights||12.0||19.3||12||IL 159 (Illinois Street) – Belleville, Collinsville|
|O'Fallon||14.2||22.9||14||Old US Highway 50 – O'Fallon|
|15.7||25.3||16||Green Mount Road – O'Fallon, Shiloh|
|18.6||29.9||19||US 50 east / IL 158 west (Air Mobility Drive) – Carlyle, Scott Air Force Base||Eastern end of US 50 concurrency; northern terminus of IL 158; signed as exits 19A (west) and 19B (east)|
|21||Rieder Road||Completed in 2017|
|Mascoutah||22.6||36.4||23||IL 4 – Mascoutah, Lebanon||Serves MidAmerica St. Louis Airport|
|New Baden||27.1||43.6||27||IL 161 – New Baden|
|Washington||||40.4||65.0||41||IL 177 – Okawville|
|Nashville||49.8||80.1||50||IL 127 – Carlyle, Nashville|
|||60.7||97.7||61||US 51 – Centralia, Ashley|
|Mount Vernon||73.3||118.0||73||I-57 north – Chicago||Western end of I-57 concurrency, exit 96 southbound; I-64 uses I-57 exit numbers|
|74.8||120.4||95||IL 15 – Mount Vernon, Ashley|
|75.8||122.0||94||Veterans Memorial Drive|
|||78.0||125.5||78||I-57 south – Memphis, Nashville, Clarksville, Paducah||Eastern end of I-57 concurrency; Exit 92 on I-57|
|||79.7||128.3||80||IL 37 – Mount Vernon|
|||88.5||142.4||89||Belle Rive, Bluford|
|Wayne||||99.3||159.8||100||IL 242 – Wayne City|
|||110.1||177.2||110||US 45 – Mill Shoals|
|Grayville||129.4||208.2||130||IL 1 – Grayville|
|Wabash River||130.4||209.9||I-64 east – Evansville, Louisville KY||Continuation into Indiana|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Google (August 2, 2014). "Overview map of Interstate 64 in Illinois" (Map). Google Maps. Google. Retrieved August 2, 2014.
- "After nearly three years of construction, new exit off Interstate 64 will open soon". bnd. Retrieved November 25, 2018.
- Interstate Exit Numbers of Illinois (PDF) (Map). Illinois Department of Transportation. November 2008.
- Town/City Boundary Map (Map). Cartography by Google, Inc. Google, Inc. Retrieved August 2, 2014 – via John Coryat.
- "Interstate 64". AARoads.com. AARoads. 2014. Retrieved August 2, 2014.