Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes I0002! I ‐ 2 46.8 75.3 US 83 in Penitas, Texas I - 69E / US 77 / US 83 in Harlingen, Texas 02013 - 01 - 01 2013 current Texas only Associated routes: none I0004! I ‐ 4 132.3 212.9 I - 275 in Tampa, Florida I - 95 / SR 400 Daytona Beach, Florida 01959 - 01 - 01 1959 current Florida only Associated routes: none I0005! I ‐ 5 1,381.29 2,222.97 Fed. 1 at Mexican border in San Ysidro, California BC 99 at Canadian border in Blaine, Washington 01956 - 01 - 01 1956 current Serves three states: CA, OR, WA Associated routes: I - 105, I - 205, I - 405, I - 505, I - 605, I - 705, I - 805; Future: I - 305, I - 905 I0008! I ‐ 8 348.25 560.45 Sunset Cliffs Boulevard / Nimitz Boulevard in San Diego, California I - 10 in Casa Grande, Arizona 01964 - 01 - 01 1964 current Serves two states: CA, AZ Associated routes: none I0010! I ‐ 10 2,460.34 3,959.53 SR 1 in Santa Monica, California I - 95 / US 17 / SR 228 in Jacksonville, Florida 01957 - 01 - 01 1957 current Serves eight states: CA, AZ, NM, TX, LA, MS, AL, FL Associated routes: I - 110, I - 210, I - 310, I - 410, I - 510, I - 610, I - 710, I - 910 I0011! I ‐ 11 15 24 US 93 near Boulder City, Nevada I - 515 / US 93 / US 95 near Henderson, Nevada 02017 - 01 - 01 2017 current Nevada only; planned extension north and south Associated routes: none I0012! I ‐ 12 85.59 137.74 I - 10 in Baton Rouge, Louisiana I - 10 / I - 59 in Slidell, Louisiana 01967 - 01 - 01 1967 current Louisiana only Associated routes: none I0014! I ‐ 14 25.90 41.68 US 190 / SH 9 in Copperas Cove, Texas I - 35 in Belton, Texas 02017 - 01 - 26 2017 current Texas only; planned extension east and west Associated routes: none I0015! I ‐ 15 1,433.52 2,307.03 I - 8 / SR 15 in San Diego, California Hwy 4 at Canadian border in Sweetgrass, Montana 01957 - 01 - 01 1957 current Serves six states: CA, NV, AZ, UT, ID, MT Associated routes: I - 115, I - 215, I - 315, I - 515 I0016! I ‐ 16 166.81 268.45 I - 75 in Macon, Georgia SR 404 and Montgomery Street / Martin Luther King Jr. Boulevard in Savannah, Georgia 01966 - 01 - 01 1966 current Georgia only Associated route: I - 516 I0017! I ‐ 17 145.76 234.58 I - 10 in Phoenix, Arizona I - 40 / SR 89A in Flagstaff, Arizona 01961 - 01 - 01 1961 current Arizona only Associated routes: none I0019! I ‐ 19 63.6 102.4 Fed. 15 at Mexican border in Nogales, Arizona Tucson, Arizona (I - 10) 01972 - 01 - 01 1972 current Arizona only Associated routes: none Uses kilometers instead of miles I0020! I ‐ 20 1,539.38 2,477.39 I - 10 between Kent and Toyah, Texas I - 95 in Florence, South Carolina 01957 - 01 - 01 1957 current Serves six states: TX, LA, MS, AL, GA, SC Associated routes: I - 220, I - 520, I - 820 I0022! I ‐ 22 213.0 342.8 I - 269 / US 78 near Byhalia I - 65 / US 31 in Birmingham, Alabama 02012 - 01 - 01 2012 current Serves two states: Mississippi, Alabama Planned associated routes: I - 222, I - 422 I0024! I ‐ 24 316.36 509.13 I - 57 in Pulley 's Mill, Illinois I - 75 in Chattanooga, Tennessee 01962 - 01 - 01 1962 current Serves four states: Illinois, Kentucky, Tennessee, Georgia Associated route: I - 124 I0025! I ‐ 25 1,062.77 1,710.36 I - 10 / US 85 / US 180 in Las Cruces, New Mexico I - 90 / US 87 in Buffalo, Wyoming 01957 - 01 - 01 1957 current Serves three states: New Mexico, Colorado, Wyoming Associated route: I - 225 I0026! I ‐ 26 305.62 491.85 US 11W in Kingsport, Tennessee US 17 in Charleston, South Carolina 01960 - 01 - 01 1960 current Serves three states: Tennessee, North Carolina, South Carolina Associated routes: I - 126, I - 526 I0027! I ‐ 27 124.13 199.77 US 87 / Loop 289 in Lubbock, Texas I - 40 / US 87 / US 287 in Amarillo, Texas 01969 - 01 - 01 1969 current Texas only Associated routes: none I0029! I ‐ 29 750.58 1,207.94 I - 35 / I - 70 in Kansas City, Missouri US 81 and PTH 29 at Canadian border in Pembina, North Dakota 01958 - 01 - 01 1958 current Serves four states: Missouri, Iowa, South Dakota, North Dakota Associated routes: I - 129, I - 229 I0030! I ‐ 30 366.76 590.24 I - 20 in Fort Worth, Texas I - 40 / US 65 / US 67 / US 167 in North Little Rock, Arkansas 01957 - 01 - 01 1957 current Serves two states: Texas, Arkansas Associated routes: I - 430, I - 530, I - 630 I0035! I ‐ 35 1,569.06 2,525.16 US 83 / SH 359 / BS I - 35 and MX - 85 at Mexican border in Laredo, Texas MN 61 / LSCT / 26th Avenue in Duluth, Minnesota 01956 - 01 - 01 1956 current Serves six states: TX, OK, KS, MO, IA, MN Associated routes: I - 35E, I - 35W, I - 135, I - 235, I - 335, I - 435, I - 535, I - 635 I0037! I ‐ 37 143.00 230.14 US 181 in Corpus Christi, Texas I - 35 / US 281 in San Antonio, Texas 01959 - 01 - 01 1959 current Texas only Associated routes: none I0039! I ‐ 39 306.14 492.68 I - 55 in Normal, Illinois WIS 29 / US 51 in Wausau, Wisconsin 01984 - 01 - 01 1984 current Serves two states: Illinois, Wisconsin Associated routes: none I0040! I ‐ 40 2,555.10 4,112.03 I - 15 in Barstow, California US 117 / NC 132 in Wilmington, North Carolina 01964 - 01 - 01 1964 current Serves eight states: CA, AZ, NM, TX, OK, AR, TN, NC Associated routes: I - 140, I - 240, I - 440, I - 540, I - 640, I - 840 I0041! I ‐ 41 176.33 283.78 I - 94 / US 41 in Russell, Illinois I - 43 in Howard, Wisconsin 02015 - 01 - 01 2015 current Serves two states: Illinois, Wisconsin Associated routes: none I0043! I ‐ 43 191.55 308.27 I - 39 / I - 90 in Beloit, Wisconsin I - 41 / US 41 / US 141 in Howard, Wisconsin 01981 - 01 - 01 1981 current Wisconsin only Associated routes: none I0044! I ‐ 44 633.79 1,019.99 US 82 / US 277 / US 281 / US 287 in Wichita Falls, Texas I - 70 in St. Louis, Missouri 01958 - 01 - 01 1958 current Serves three states: Texas, Oklahoma, Missouri Associated routes: I - 244, I - 444 I0045! I ‐ 45 284.91 458.52 SH 87 in Galveston, Texas I - 30 in Dallas, Texas 01971 - 01 - 01 1971 current Texas only Associated route: I - 345 I0049! I ‐ 49 388.25 624.83 I - 10 in Lafayette, Louisiana I - 435 in Kansas City, Missouri 01984 - 01 - 01 1984 current Serves three states: Louisiana, Arkansas, Missouri Associated routes: none I0055! I ‐ 55 964.25 1,551.81 I - 10 in LaPlace, Louisiana US 41 in Chicago, Illinois 01960 - 01 - 01 1960 current Serves six states: LA, MS, TN, AR, MO, IL Associated routes: I - 155, I - 255, I - 355; I - 555 I0057! I ‐ 57 386.12 621.40 I - 55 in Miner, Missouri I - 94 in Chicago, Illinois 01965 - 01 - 01 1965 current Serves two states: Missouri, Illinois. Planned in 1 more: Arkansas Associated routes: none I0059! I ‐ 59 445.23 716.53 I - 10 / I - 12 in Slidell, Louisiana I - 24 in Lookout Mountain, Georgia 01960 - 01 - 01 1960 current Serves four states: Louisiana, Mississippi, Alabama, Georgia Associated routes: I - 359, I - 459, I - 759 I0064! I ‐ 64 953.74 1,534.90 I - 70 in Wentzville, Missouri I - 264 / I - 664 in Chesapeake, Virginia 01961 - 01 - 01 1961 current Serves six states: MO, IL, IN, KY, WV, VA Associated routes: I - 264, I - 464, I - 564, I - 664 I0065! I ‐ 65 887.30 1,427.97 I - 10 in Mobile, Alabama I - 90, US - 12, US - 20 in Gary, Indiana 01958 - 01 - 01 1958 current Serves four states: Alabama, Tennessee, Kentucky, Indiana Associated routes: I - 165, I - 265, I - 465, I - 565, I - 865 I0066! I ‐ 66 76.28 122.76 I - 81 in Front Royal, Virginia US 29 in Washington, D.C. 01982 - 01 - 01 1982 current Serves District of Columbia and one state: Virginia Associated routes: None, had one proposed auxiliary route, I - 266, but was cancelled due to freeway revolts. I0068! I ‐ 68 112.9 181.7 I - 79 in Morgantown, West Virginia I - 70 in Hancock, Maryland 01991 - 01 - 01 1991 current Serves two states: West Virginia, Maryland Associated routes: None I0069! I ‐ 69 705.40 1,135.23 I - 69E / US 77 & I - 69W / US 59 in Victoria, Texas (future) Hwy 402 at Canadian border in Port Huron, Michigan 01957 - 01 - 01 1957 current Unfinished Texas section: Rosenberg (US - 59 / Spur 529) to Splendora (US 59 / Mandell Road) Unfinished Mississippi - Tennessee section: Banks, Mississippi (MS 304 / MS 713) to Frayser, Tennessee (US 51 / TN 3) Unfinished Indiana section: Bloomington, Indiana to Indianapolis, Indiana Serves six states: TX, MS, TN, KY, IN, MI. Planned / started in 2 more: LA, AR Associated routes: I - 69C, I - 69E, I - 69W, I - 169, I - 269, I - 369, I - 469; Planned: I - 169 in Tennessee, I - 369 in Kentucky I0070! I ‐ 70 2,153.43 3,465.61 I - 15 in Cove Fort, Utah Park and ride in Baltimore, Maryland 01956 - 01 - 01 1956 current Serves 10 states: UT, CO, KS, MO, IL, IN, OH, WV, PA, MD Associated routes: I - 170, I - 270, I - 370, I - 470, I - 670 I0071! I ‐ 71 343.78 553.26 I - 64 in Louisville, Kentucky I - 90 in Cleveland, Ohio 01959 - 01 - 01 1959 current Serves two states: Kentucky, Ohio Associated routes: I - 271, I - 471 I0072! I ‐ 72 179.29 288.54 US 61 in Hannibal, Missouri I - 57 in Champaign, Illinois 01970 - 01 - 01 1970 current Serves two states: Missouri, Illinois Associated route: I - 172 I0073! I ‐ 73 82.4 132.6 US 220 near Ellerbe, North Carolina I ‐ 840 / Bryan Boulevard in Greensboro, North Carolina 01997 - 01 - 01 1997 current North Carolina only Associated routes: none I0074! I ‐ 74 440.91 709.58 I - 80 in Bettendorf, Iowa NC 41 near Lumberton, North Carolina 01974 - 01 - 01 1974 current Serves five states: IA, IL, IN, OH, NC Associated routes: I - 474 I0075! I ‐ 75 1,786.47 2,875.04 SR 826 near Hialeah, Florida Sault Ste. Marie, Michigan (Canada) 01958 - 01 - 01 1958 current Serves six states: FL, GA, TN, KY, OH, MI Associated routes: I - 175, I - 275, I - 375, I - 475, I - 575, I - 675 I0076! I ‐ 76 187.34 301.49 West Denver, Colorado (I - 70) Big Springs, Nebraska (I - 80) 01975 - 01 - 01 1975 current Serves two states: Colorado, Nebraska Associated routes: none I0076! I ‐ 76 434.36 699.03 East Westfield Center, Ohio (I - 71) Bellmawr, New Jersey (I - 295) 01964 - 01 - 01 1964 current Serves three states: Ohio, Pennsylvania, New Jersey Associated routes: I - 176, I - 276, I - 376, I - 476, I - 676; Future: I - 576 I0077! I ‐ 77 610.10 981.86 Columbia, South Carolina (I - 26) Cleveland, Ohio (I - 90) 01958 - 01 - 01 1958 current Serves five states: South Carolina, North Carolina, Virginia, West Virginia, Ohio Associated route: I - 277 I0078! I ‐ 78 143.56 231.04 Union Township, Pennsylvania (I - 81) New York City 01957 - 01 - 01 1957 current Serves three states: Pennsylvania, New Jersey, New York Associated routes: I - 278, I - 478, I - 678, I - 878 I0079! I ‐ 79 343.24 552.39 Charleston, West Virginia (I - 77) Erie, Pennsylvania (PA - 5) 01967 - 01 - 01 1967 current Serves two states: West Virginia, Pennsylvania Associated routes: I - 279, I - 579 I0080! I ‐ 80 2,899.54 4,666.36 San Francisco, California (US 101) Teaneck, New Jersey (I - 95) 01956 - 01 - 01 1956 current Serves 11 states: CA, NV, UT, WY, NE, IA, IL, IN, OH, PA, NJ Associated routes: I - 180, I - 238 I - 280, I - 380, I - 480, I - 580, I - 680, I - 780, I - 880, I - 980 I0081! I ‐ 81 854.89 1,375.81 Dandridge, Tennessee (I - 40) Fisher 's Landing, New York (Canada) 01961 - 01 - 01 1961 current Serves six states: TN, VA, WV, MD, PA, NY Associated routes: I - 381, I - 481, I - 581, I - 781 I0082! I ‐ 82 143.58 231.07 Ellensburg, Washington (I - 90) Hermiston, Oregon (I - 84) 01957 - 01 - 01 1957 current Serves two states: Washington, Oregon Associated route: I - 182 I0083! I ‐ 83 85.3 137.3 Baltimore, Maryland Harrisburg, Pennsylvania (I - 81) 01959 - 01 - 01 1959 current Serves two states: Maryland, Pennsylvania Associated route: I - 283 I0084! I ‐ 84 769.62 1,238.58 West Portland, Oregon (I - 5) Echo, Utah (I - 80) 01980 - 01 - 01 1980 current Serves three states: Oregon, Idaho, Utah Associated route: I - 184 I0084! I ‐ 84 232.4 374.0 East Scranton, Pennsylvania (I - 81) Sturbridge, Massachusetts (I - 90) 01963 - 01 - 01 1963 current Serves four states: Pennsylvania, New York, Connecticut, Massachusetts Associated routes: I - 384, I - 684 I0085! I ‐ 85 668.75 1,076.25 Montgomery, Alabama (I - 65) Petersburg, Virginia (I - 95) 01958 - 01 - 01 1958 current Serves five states: Alabama, Georgia, South Carolina, North Carolina, Virginia Associated routes: I - 185, I - 285, I - 385, I - 485, I - 585, I - 785, I - 985; Planned: I - 685 I0086! I ‐ 86 62.85 101.15 West Heyburn, Idaho (I - 84) Pocatello, Idaho (I - 15) 01980 - 01 - 01 1980 current Idaho only Associated routes: none I0086! I ‐ 86 183.56 295.41 East Erie, Pennsylvania (I - 90) Windsor, New York (NY 79) 01999 - 01 - 01 1999 current Serves two states: Pennsylvania, New York Associated routes: none I0087! I ‐ 87 10.4 16.7 Raleigh, North Carolina (I - 440 / US 64 / US 264) Wendell, North Carolina (US 64 / US 264) 02017 - 01 - 01 2017 current North Carolina only Associated routes: None, will eventually have one spur route, I - 587. I0087! I ‐ 87 333.49 536.70 New York City (I - 278) Champlain, New York (A-15 at Canadian border) 01957 - 01 - 01 1957 current New York only Associated routes: I - 287, I - 587, I - 787 I0088! I ‐ 88 140.6 226.3 West Barstow, Illinois (I - 80) Hillside, Illinois (I - 290) 01987 - 01 - 01 1987 current Illinois only Associated routes: none I0088! I ‐ 88 117.75 189.50 East Binghamton, New York (I - 81) Schenectady, New York (I - 90) 01968 - 01 - 01 1968 current New York only Associated routes: none I0089! I ‐ 89 191.12 307.58 Bow, New Hampshire (I - 93) Highgate Springs, Vermont (Route 133 at Canadian border / future A-35) 01960 - 01 - 01 1960 current Serves two states: New Hampshire, Vermont Associated route: I - 189 I0090! I ‐ 90 3,020.44 4,860.93 Seattle, Washington (WA 519) Boston, Massachusetts (MA 1A) 01956 - 01 - 01 1956 current Serves 13 states: WA, ID, MT, WY, SD, MN, WI, IL, IN, OH, PA, NY, MA Associated routes: I - 190, I - 290, I - 390, I - 490, I - 590, I - 690, I - 790, I - 890, I - 990 I0091! I ‐ 91 290.37 467.31 New Haven, Connecticut / North Haven, Connecticut (I - 95) Derby Line, Vermont (A-55 at Canadian border) 01958 - 01 - 01 1958 current Serves three states: Connecticut, Massachusetts, Vermont Associated routes: I - 291, I - 391, I - 691 I0093! I ‐ 93 189.95 305.69 Canton, Massachusetts (I - 95) St. Johnsbury, Vermont (I - 91) 01957 - 01 - 01 1957 current Serves three states: Massachusetts, New Hampshire, Vermont Associated routes: I - 293, I - 393 I0094! I ‐ 94 1,585.20 2,551.13 Billings, Montana (I - 90) Port Huron, Michigan (Hwy 402 at Canadian border) 01956 - 01 - 01 1956 current Serves seven states: MT, ND, MN, WI, IL, IN, MI Associated routes: I - 194, I - 294, I - 394, I - 494, I - 694, I - 794, I - 894 I0095! I ‐ 95 1,925.74 3,099.18 US 1 in Miami, Florida NB 95 at Canadian border in Houlton, Maine 01957 - 01 - 01 1957 current Serves DC and 15 states: FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, NH, ME Associated routes: I - 195, I - 295, I - 395, I - 495, I - 595, I - 695, I - 795, I - 895 I0096! I ‐ 96 192.06 309.09 Muskegon, Michigan (US 31) Detroit, Michigan (I - 75) 01959 - 01 - 01 1959 current Michigan only Associated routes: I - 196, I - 296, I - 496, I - 696 I0097! I ‐ 97 17.62 28.36 Annapolis, Maryland (US 50) Baltimore, Maryland (I - 695 / I - 895) 01987 - 01 - 01 1987 current Maryland only Associated routes: None, had 2 auxiliary routes planned, I - 197 and I - 297, but they were replaced by I - 595 and MD Route 3. I0099! I ‐ 99 98.86 159.10 Bedford, Pennsylvania (I - 70 / I - 76) Painted Post, New York (I - 86) 01998 - 01 - 01 1998 current Unfinished Pennsylvania section: Bellefonte, Pennsylvania (I - 80) to New York border near Lawrenceville, Pennsylvania (US 15) Serves two states: Pennsylvania, New York Associated routes: none
what is the longest interstate highway in the united states
I ‐ 80