Illinois | 25 active routes | 2,203.42 mi.
- I-24, I-39, I-41, I-55, I-57, I-64, I-70, I-72, I-74, I-80, I-88, I-90, I-94
- I-155, I-255, I-355, I-270, I-172, I-474, I-180, I-280, I-190, I-290, I-390, I-490, I-294, I-494
Indiana | 14 active routes | 1,306.52 mi.
- I-64, I-65, I-69, I-70, I-74, I-80, I-90, I-94
- I-164, I-469, I-265, I-465, I-865, I-275
Iowa | 11 active routes | 781.24 mi.
Kansas | 9 active routes | 874.34 mi.
Kentucky | 11 active routes | 913.20 mi.
- I-24, I-64, I-65, I-69, I-71, I-75
- I-165, I-264, I-265, I-169, I-369, I-275, I-471
Louisiana | 13 active routes | 933.84 mi.
- I-10, I-12, I-20, I-49, I-55, I-59, I-69
- I-110, I-210, I-310, I-410, I-510, I-610, I-910, I-220
Maine | 5 active routes | 366.54 mi.
Maryland | 16 active routes | 480.09 mi.
- I-68, I-70, I-81, I-83, I-95, I-97
- I-170, I-270, I-370, I-195, I-295, I-395, I-495, I-595, I-695, I-795, I-895
Massachusetts | 13 active routes | 565.63 mi.
- I-84, I-90, I-91, I-93, I-95
- I-190, I-290, I-291, I-391, I-195, I-295, I-395, I-495
Michigan | 13 active routes | 1,240.96 mi.
- I-69, I-75, I-94, I-96
- I-275, I-375, I-475, I-675, I-194, I-196, I-296, I-496, I-696
Minnesota | 9 active routes | 912.73 mi.
Mississippi | 9 active routes | 831.47 mi.
Missouri | 18 active routes | 1,386.23 mi.
- I-29, I-35, I-44, I-49, I-55, I-57, I-64, I-70, I-72
- I-229, I-435, I-635, I-155, I-255, I-364, I-170, I-270, I-370, I-470, I-570, I-670
Montana | 5 active routes | 1,191.23 mi.
Nebraska | 6 active routes | 481.66 mi.
Nevada | 6 active routes | 623.79 mi.
New Hampshire | 5 active routes | 224.54 mi.
New Jersey | 10 active routes | 431.36 mi.
New Mexico | 3 active routes | 999.90 mi.
New York | 31 active routes | 1,730.34 mi.
- I-78, I-81, I-84, I-86, I-87, I-88, I-90, I-95, I-99
- I-278, I-478, I-678, I-878, I-481, I-781, I-684, I-287, I-587, I-687, I-787, I-190, I-290, I-390, I-490, I-590, I-690, I-790, I-890, I-990, I-295, I-495, I-695, I-895
North Carolina | 19 active routes# | 1,337.30 mi.
- I-26, I-40, I-42, I-73, I-74, I-77, I-85, I-87, I-95
- I-140, I-240, I-440, I-540, I-840, I-274, I-277, I-285, I-485, I-587, I-785, I-885, I-295, I-495, I-795
North Dakota | 3 active routes | 571.13 mi.
Ohio | 21 active routes | 1,572.35 mi.
- I-70, I-71, I-74, I-75, I-76, I-77, I-80, I-90
- I-270, I-470, I-670, I-271, I-471, I-275, I-475, I-675, I-277, I-280, I-480, I-680, I-490
Oklahoma | 7 active routes | 930.16 mi.
Oregon | 6 active routes | 727.41 mi.
Pennsylvania | 23 active routes## | 1,862.21 mi.
- I-70, I-76, I-78, I-79, I-80, I-81, I-83, I-84, I-86, I-90, I-95, I-99
- I-176, I-276, I-376, I-476, I-576, I-676, I-279, I-579, I-178, I-378, I-180, I-380, I-283, I-295
Puerto Rico | 3 active routes | 249.77 mi.
Rhode Island | 3 active routes | 68.53 mi.
South Carolina | 11 active routes | 850.80 mi.
- I-20, I-26, I-73, I-74, I-77, I-85, I-95
- I-126, I-326, I-520, I-526, I-185, I-385, I-585
South Dakota | 4 active routes | 678.31 mi.
Tennessee | 17 active routes### | 1,959.54 mi.
- I-24, I-26, I-40, I-55, I-65, I-69, I-81
- I-124, I-140, I-240, I-440, I-640, I-840, I-155, I-265, I-269, I-275, I-181
Texas | 25 active routes | 3,501.15 mi.
- I-2, I-10, I-14, I-20, I-27, I-30, I-35, I-35E, I-35W, I-37, I-40, I-44, I-45, I-69
- I-110, I-410, I-610, I-820, I-635, I-345, I-69C, I-69E, I-69W, I-169, I-369
Utah | 5 active routes | 938.00 mi.
Vermont | 4 active routes | 320.22 mi.
Virginia | 16 active routes | 1,117.23 mi.
- I-64, I-66, I-73, I-77, I-81, I-85, I-95
- I-264, I-464, I-564, I-664, I-381, I-581, I-785, I-195, I-295, I-395, I-495, I-895
Washington | 7 active routes | 763.67 mi.
West Virginia | 7 active routes | 549.05 mi.
Wisconsin | 7 active routes | 741.80 mi.
Wyoming | 4 active routes | 913.60 mi.
# – I-495 was renumbered as I-87 in 2016
## – I-295 was established over a portion of I-95 in Bucks County in 2018
### – The remainder of I-181 was renumbered as an extension of I-26 in 2005.
Page updated October 10, 2019.