Eisenhower Interstate System (thing)

Here is a listing of the 1- and 2-digit US interstates, along with their associated 3-digit interstates. Note that 3-digit interstate numbers are only unique within states, so multiple highways with the same 3-digit interstate designation are quite common. For example, there are seven distinct 295's. 2-digit interstate numbers are unique nationwide, with the exceptions of 76, 84, 86, and 88.

Interstate 4 
Interstate 5:  105 205 305 405 505 605 705 805 905
Interstate 8
Interstate 10: 110 210 310 410 510 610 710 910*
Interstate 12
Interstate 15: 115 215 315 515
Interstate 16: 516
Interstate 17
Interstate 19
Interstate 20: 220 520 820
Interstate 24: 124
Interstate 25: 225
Interstate 26: 126 526
Interstate 27
Interstate 29: 129 229
Interstate 30: 130* 430 530 630
Interstate 35: 135 235 335 435 535 635
Interstate 37
Interstate 39
Interstate 40: 140 240 440 540 640 840
Interstate 43
Interstate 44: 244 444
Interstate 45: 345
Interstate 49
Interstate 55: 155* 255 355 555
Interstate 57
Interstate 59: 359 459 759
Interstate 64: 164 264 464 564 664
Interstate 65: 165 265 465 565
Interstate 66
Interstate 68
Interstate 69: 469
Interstate 70: 170 270 370 470 670
Interstate 71: 271 471
Interstate 72: 172
Interstate 73
Interstate 74: 474
Interstate 75: 175 275 375 475 575 675
Interstate 76: 176 276 376 476 676
Interstate 77: 277
Interstate 78: 278 678
Interstate 79: 279 579
Interstate 80: 180 280 380 480 580 680 780 880 980 238
Interstate 81: 181 381 481 581
Interstate 82: 182
Interstate 83: 283
Interstate 84: 184 384 684
Interstate 85: 185 285 385 485 585 785* 985
Interstate 86 
Interstate 87: 287 587 787
Interstate 88
Interstate 89: 189
Interstate 90: 190 290 390 490 590 690 790 890 990
Interstate 91: 291 391 691
Interstate 93: 293 393
Interstate 94: 194 294 394 494 694 794 894
Interstate 95: 195 295 395 495 595 695 795 895
Interstate 96: 196 496 696
Interstate 97
Interstate 99
Interstate H-1: I-H-201
Interstate H-2
Interstate H-3


* Indicates this is a future interstate number

Longest interstate (2-digit): I-90 – 3,085.27 mi
Shortest interstate (2-digit): I-97 – 17.57 mi
Longest interstate (3-digit): I-476 – 129.61 mi
Shortest interstate (3-digit): I-395 (Maryland) – 0.72 mi

For details about the interstate numbering system, see interstate and interstate naming rules.

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I've referenced a number of varying sources, so please /msg me about any oversights or updates. Thank you.