List of Interstate Highways in Illinois
Number Length ( mi ) Length ( km ) Southern or western terminus Northern or eastern terminus Formed Removed
I-24 38.73 62.33 I-57 in Williamson County I-24 at Metropolis 01977-01-01 1977 current
I-39 123.42 198.63 I-55 in Normal I-39 / I-90 in South Beloit 01989-01-01 1989 current
I-41 0.90 1.45 I-94 / US 41 in Russell I-41 / I-94 near Russell 02015-04-07 2015 current
I-55 294.38 473.76 I-55 / I-64 in East St. Louis US 41 ( Lake Shore Drive ) in Chicago 01960-01-01 1960 current
I-57 364.16 586.06 I-57 near Cairo I-94 in Chicago 01969-01-01 1969 current
I-64 128.12 206.19 I-55 / I-64 in East St. Louis I-64 in Grayville 01974-01-01 1974 current
I-70 135.74 218.45 I-70 in East St. Louis I-70 in Clark County - -
I-72 177.35 285.42 I-72 / US 36 in Pike County I-57 in Champaign 01970-01-01 1970 current
I-74 220.34 354.60 I-74 / US 6 in Moline I-74 in Danville - -
I-80 163.52 263.16 I-80 in Rock Island County I-80 / I-94 in Lansing 01967-01-01 1967 current
I-88 140.60 226.27 I-80 in Silvis I-290 in Hillside 01987-01-01 1987 current
I-90 123.89 199.38 I-39 / I-90 in South Beloit I-90 in Chicago - -
I-94 61.53 99.02 I-94 / US 41 near Russell I-80 / I-94 in Lansing - -
Primary Interstate Highways
The Interstate Highways in Illinois are all segments of the Interstate Highway System that are owned and maintained by the U.S. state of Illinois. The Illinois Department of Transportation (IDOT) is responsible for maintaining these highways in Illinois. The Interstate Highway System in Illinois consists of 13 primary highways and 11 auxiliary highways which cover . The Interstate Highway with the longest section in Illinois is Interstate 57 at ; the shortest is Interstate 41 at .