Longest state segments of three-digit Interstate Highways

Source: en.wikipedia.org

RANKINGS (As of 02/24/21 – Minimum of 40 miles in length)

  1. Interstate 476 – Pennsylvania = 129.61 miles
  2. Interstate 495 – Massachusetts = 121.56 miles
  3. Interstate 135 – Kansas = 95.74 miles
  4. Interstate 196 – Michigan = 80.65 miles
  5. Interstate 376 – Pennsylvania = 78.70 miles
  6. Interstate 840 – Tennessee = 77.28 miles
  7. Interstate 295 – New Jersey = 76.40 miles
  8. Interstate 390 – New York = 76.06 miles
  9. Interstate 580 – California = 75.63 miles
  10. Interstate 380 – Iowa = 73.05 miles
  11. Interstate 405 – California = 72.15 miles
  12. Interstate 680 – California = 70.52 miles
  13. Interstate 165 – Kentucky = 69.68 miles
  14. Interstate 287 – New Jersey = 67.54 miles
  15. Interstate 275 – Ohio = 66.76 miles
  16. Interstate 485 – North Carolina = 66.68 miles
  17. Interstate 495 – New York = 66.38 miles
  18. Interstate 285 – Georgia = 63.98 miles
  19. Interstate 295 – Florida = 61.04 miles
  20. Interstate 275 – Florida = 60.64 miles
  21. Interstate 280 – California = 57.22 miles
  22. Interstate 587 – North Carolina = 55.90 miles
  23. Interstate 270 – Ohio = 54.97 miles
  24. Interstate 395 – Connecticut = 54.69 miles
  25. Interstate 215 – California = 54.50 miles
  26. Interstate 435 – Missouri = 54.16 miles
  27. Interstate 294 – Illinois = 53.42 miles
  28. Interstate 295 – Maine = 53.11 miles
  29. Interstate 465 – Indiana = 52.79 miles
  30. Interstate 295 – Virginia = 52.56 miles
  31. Interstate 695 – Maryland =51.46 miles
  32. Interstate 335 – Kansas = 50.13 miles
  33. Interstate 555 – Arkansas = 49.80 miles
  34. Interstate 410 – Texas = 49.49 miles
  35. Interstate 185 – Georgia = 49.30 miles
  36. Interstate 210 – California = 48.72 miles
  37. Interstate 880 – California = 47.22 miles
  38. Interstate 530 – Arkansas = 46.65 miles
  39. Interstate 271 – Ohio = 46.06 miles
  40. Interstate 494 – Minnesota = 42.94 miles
  41. Interstate 495 – Maryland = 42.24
  42. Interstate 385 – South Carolina = 42.16 miles
  43. Interstate 480 – Ohio = 41.77 miles

Note: State segments listed above may or may not be the entire length of the Interstate, but represent the mileage in that particular state.

SOURCES:

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