List of longest State Highways in the United States - Wikipedia List of longest State Highways in the United States This article 's factual accuracy may be compromised due to out - of - date information. Please update this article to reflect recent events or newly available information. ( February 2012 ) In the United States, each state maintains its own system of state highways. This is a list of the longest state highways in each state. As of 2007, the longest state highway in the nation is Montana Highway 200, which is 706.624 miles ( 1,137.201 km ) long. The shortest of the longest state highways is District of Columbia Route 295, which is only 4.29 miles ( 6.90 km ) long. Contents 1 List of highways 2 Notes 3 See also 4 References 5 External links List of highways Longest state highways by state State Highway Miles km References Alabama State Route 3 386.449 621.929 Alaska Route 1 545.92 878.57 Arizona State Route 87 272.66 438.80 Arkansas Highway 7 296.01 476.38 California State Route 1 655.84 1,055.47 Colorado State Highway 14 236.92 381.29 Connecticut Route 15 83.53 134.43 Delaware Route 1 103.02 165.79 District of Columbia Route 295 4.29 6.90 Florida State Road 5 536.724 863.774 Georgia State Route 11 374 602 Hawaii Route 11 122.3 196.8 Idaho State Highway 75 170.666 274.660 Illinois Route 1 336 541 Indiana State Road 37 229.4 369.2 Iowa Highway 3 326.163 524.908 Kansas K - 4 367 591 Kentucky Route 80 464.936 748.242 Louisiana LA 1 431.587 694.572 Maine State Route 11 401.2 645.7 Maryland Route 2 79.24 127.52 Massachusetts Route 28 151.93 244.51 Michigan M - 28 290.373 467.310 Minnesota State Highway 1 345.954 556.759 Mississippi Highway 15 328 528 Missouri Route 5 355 571 Montana Highway 200 706.624 1,137.201 Nebraska Highway 92 489.08 787.10 Nevada State Route 318 110.775 178.275 New Hampshire Route 16 149.75 241.00 New Jersey Route 47 75.19 121.01 New Mexico State Road 120 119.9 193.0 New York State Route 17 396.84 638.65 North Carolina Highway 24 284 457 North Dakota Highway 200 420 680 Ohio State Route 7 292.20 470.25 Oklahoma State Highway 3 615.0 989.7 Oregon Route 140 237.01 381.43 Pennsylvania Route 18 205 330 Rhode Island Route 114 45.70 73.55 South Carolina Highway 9 257 414 South Dakota Highway 20 432 695 Tennessee State Route 1 538.8 867.1 Texas State Highway 16 541.8 871.9 Utah State Route 24 160.243 257.886 Vermont Route 100 216.55 348.50 Virginia State Route 40 227.68 366.42 Washington State Route 20 436.13 701.88 West Virginia Route 20 262.1 421.8 Wisconsin Highway 35 412.15 663.29 Wyoming Highway 789 407.10 655.16 Notes Jump up ^ Some states internally number the Interstate Highways and U.S. Highways within their state as state highways ; these are not counted in the list. Jump up ^ DC - 295 is the only non-national route in the district. Jump up ^ NJ 47 is New Jersey 's longest signed state highway, but NJ 444 ( the unsigned designation for the Garden State Parkway ) is longer at 172.4 miles ( 277.5 km ) Jump up ^ OK - 3 's length was computed using OK - 3E, the older ( and longer ) of its two forks. See also U.S. Roads portal References Jump up ^ Alabama Department of Transportation. County Milepost Maps ( PDF ) ( Map ). Montgomery : Alabama Department of Transportation. Archived from the original ( PDF ) on June 25, 2008. Retrieved September 2007. Check date values in : access - date = ( help ) Jump up ^ Alaska Department of Transportation and Public Facilities ( April 25, 2006 ). `` Central Region General Log '' ( PDF ). Juneau : Alaska Department of Transportation and Public Facilities. Routes 110000 ( Sterling Highway ), 130000 ( Seward Highway ), 134150 ( Ingra Street ), 134600 ( 6th Avenue ), 134440 ( 5th Avenue ), and 135000 ( Glenn Highway ). Alaska Department of Transportation and Public Facilities ( April 25, 2006 ). `` Northern Region General Log '' ( PDF ). Juneau : Alaska Department of Transportation and Public Facilities. Routes 135000 ( Glenn Highway ), 190000 ( Richardson Highway ), and 230000 ( Tok Cut - Off Highway ). Jump up ^ Arizona Department of Transportation. `` 2006 State Highway System Log '' ( PDF ). Phoenix : Arizona Department of Transportation. Archived from the original ( PDF ) on June 25, 2008. Retrieved September 6, 2008. Jump up ^ Planning and Research Division ( 2010 ). `` Arkansas Road Log Database ''. Arkansas State Highway and Transportation Department. Archived from the original ( Database ) on June 23, 2011. Retrieved June 9, 2011. Jump up ^ California Department of Transportation. Truck Network Map ( Map ). Sacramento : California Department of Transportation. Retrieved March 1, 2014. Jump up ^ Colorado Department of Transportation. `` Segment list for SH 14 ''. Denver : Colorado Department of Transportation. Retrieved May 12, 2007. Jump up ^ Connecticut Department of Transportation. `` Connecticut State Numbered Routes and Roads '' ( PDF ). Hartford : Connecticut Department of Transportation. Archived from the original ( PDF ) on July 26, 2015. Retrieved October 30, 2007. Jump up ^ Delaware Department of Transportation ( 2006 ). `` Traffic Count and Mileage Report '' ( PDF ). Dover : Delaware Department of Transportation. Archived from the original ( PDF ) on March 18, 2009. Jump up ^ `` National Highway Planning Network GIS data ''. Federal Highway Administration. August 2005. Archived from the original on August 23, 2007. Retrieved July 9, 2007. Jump up ^ Florida Department of Transportation. `` Straight Line Diagrams ''. Florida Department of Transportation. Archived from the original on March 6, 2014. Retrieved March 2014. Check date values in : access - date = ( help ) Jump up ^ Georgia Department of Transportation. `` 400 reports '' ( PDF ). Atlanta : Georgia Department of Transportation. Archived from the original ( PDF ) on September 26, 2007. Jump up ^ Voss, Oscar. `` Big Island Route List ''. Hawaii Highways. Retrieved October 22, 2007. Jump up ^ Idaho Transportation Department. `` Idaho Milepoint Log ''. Boise : Idaho Transportation Department. Archived from the original on August 17, 2009. Jump up ^ Rand McNally ( 2004 ). The Road Atlas United States, Canada and Mexico ( Map ). Chicago : Rand McNally. Jump up ^ Google ( August 12, 2009 ). `` Length of Indiana Route 37 : Southern Segment '' ( Map ). Google Maps. Google. Retrieved August 12, 2009. Google ( August 12, 2009 ). `` Length of Indiana Route 37 : Northern Segment '' ( Map ). Google Maps. Google. Retrieved August 12, 2009. Jump up ^ `` 2009 Volume of Traffic on the Primary Road System of Iowa '' ( PDF ). Iowa Department of Transportation. January 1, 2009. Retrieved January 10, 2011. Jump up ^ Division of Planning. `` Highway Information System Official Milepoint Route Log Extract ''. Kentucky Transportation Cabinet. Archived from the original on April 30, 2007. Retrieved April 7, 2007. Jump up ^ Louisiana Department of Transportation and Development, Highway Inventory Unit ( 2016 ). `` LRS Conversion Tool ''. Louisiana Department of Transportation and Development. Retrieved August 12, 2017. Jump up ^ `` Maine State Route 11 ''. Floodgap Roadgap 's RoadsAroundME. Archived from the original on June 12, 2011. Retrieved July 21, 2009. Jump up ^ Maryland State Highway Administration. `` Highway Location Reference ''. Annapolis : Maryland State Highway Administration. Archived from the original on May 6, 2008., 2005 Jump up ^ Massachusetts Office of Transportation Planning. `` 2005 Road Inventory ''. Executive Office of Transportation. Archived from the original on September 27, 2006. Jump up ^ Michigan Department of Transportation & Michigan Center for Shared Solutions and Technology Partnerships ( 2009 ). MDOT Physical Reference Finder Application ( Map ). Michigan Department of Transportation. Retrieved April 13, 2010. Jump up ^ Minnesota Department of Transportation. `` Statewide Trunk Logpoint Listing '' ( PDF ). St. Paul : Minnesota Department of Transportation. Jump up ^ `` Mississippi Route index : MS 15 ''. Jump up ^ Montana Department of Transportation. Official 2007 -- 2008 Montana Highway Travel Map ( PDF ) ( Map ). Helena : Montana Department of Transportation. Archived from the original ( PDF ) on July 28, 2007. Retrieved September 9, 2007. Jump up ^ Nebraska Department of Roads. Nebraska Highway Reference Log Book ( PDF ). Lincoln : Nebraska Department of Roads. Retrieved February 25, 2009. Jump up ^ Nevada Department of Transportation. Nevada State Maintained Highways, Descriptions, Index and Maps. Nevada Department of Transportation. Archived from the original on January 24, 2008. Retrieved March 1, 2014. Jump up ^ New Hampshire Department of Transportation. `` Route Logs ''. New Hampshire Department of Transportation. Archived from the original on July 26, 2011. ( Registration required ( help ) ). Jump up ^ New Jersey Department of Transportation. `` Route 47 Straight Line Diagram '' ( PDF ). New Jersey Department of Transportation. Retrieved April 9, 2007. Jump up ^ New Mexico Department of Transportation. New Mexico Department of Transportation State Route Log ( PDF ). Santa Fe : New Mexico Department of Transportation. Archived from the original ( PDF ) on October 29, 2005. Retrieved October 25, 2008. Jump up ^ New York State Department of Transportation ( July 25, 2008 ). 2007 Traffic Data Report for New York State ( PDF ). Albany : New York State Department of Transportation. Retrieved July 17, 2009. Jump up ^ `` N.C. 24 ''. NCRoads.com. Archived from the original on September 25, 2008. Jump up ^ Mileage retrieved from North Dakota Highways 101 + Archived September 29, 2013, at the Wayback Machine. unless otherwise noted. Jump up ^ Transportation System Development ( May 13, 2008 ). `` RI82B : Centerline Miles, Lane Miles, and VMT by Route and County ''. Ohio Department of Transportation. Retrieved August 4, 2009. Jump up ^ Google ( April 27, 2014 ). `` SH - 3 -- Colorado to Seiling '' ( Map ). Google Maps. Google. Retrieved April 27, 2014. Google ( April 27, 2014 ). `` SH - 3 -- Seiling to Southwest Oklahoma City '' ( Map ). Google Maps. Google. Retrieved April 27, 2014. Google ( April 27, 2014 ). `` SH - 3 -- Overlap with I - 240 '' ( Map ). Google Maps. Google. Retrieved April 27, 2014. Google ( May 13, 2014 ). `` SH - 3 -- Overlap with I - 40 '' ( Map ). Google Maps. Google. Retrieved May 13, 2014. Google ( May 13, 2014 ). `` SH - 3E '' ( Map ). Google Maps. Google. Retrieved May 13, 2014. Google ( May 23, 2014 ). `` SH - 3 -- Ada to Idabel '' ( Map ). Google Maps. Google. Retrieved May 23, 2014. Google ( May 23, 2014 ). `` SH - 3 -- Idabel to Arkansas '' ( Map ). Google Maps. Google. Retrieved May 23, 2014. Jump up ^ Oregon Department of Transportation. `` Public Road Inventory ''. Oregon Department of Transportation. Archived from the original on February 24, 2008. Retrieved March 2008. Check date values in : access - date = ( help ) ( primarily the Digital Video Log ) Jump up ^ Calculated using DeLorme Street Atlas USA software Jump up ^ Google ( December 20, 2011 ). `` Overview map of RI 114 '' ( Map ). Google Maps. Google. Retrieved December 20, 2011. Jump up ^ Google ( August 11, 2009 ). `` Length of South Carolina Highway 9 '' ( Map ). Google Maps. Google. Retrieved August 11, 2009. Jump up ^ Google ( August 11, 2009 ). `` Length of South Dakota Route 20 : Western Segment '' ( Map ). Google Maps. Google. Retrieved August 11, 2009. Google ( August 11, 2009 ). `` Length of South Dakota Route 20 : Eastern Segment '' ( Map ). Google Maps. Google. Retrieved August 11, 2009. Jump up ^ Texas Department of Transportation. `` State Highway, Loop and Spur Facts ''. Texas Department of Transportation. Retrieved July 20, 2009. Jump up ^ Utah Department of Transportation. `` Highway Reference ''. Utah Department of Transportation. Retrieved January 27, 2014. Jump up ^ Vermont Agency of Transportation. `` 2004 ( Route Log ) AADTs : State Highways '' ( PDF ). Vermont Agency of Transportation. Archived from the original ( PDF ) on October 27, 2007. Retrieved October 28, 2007. Jump up ^ Virginia Department of Transportation ( October 2006 ). `` DRAFT Roadway Network ''. Virginia Department of Transportation. Archived from the original ( GIS data ) on May 18, 2008. Jump up ^ Washington State Department of Transportation ( 2013 ). State Highway Log : Planning Report 2013, SR 2 to SR 971 ( PDF ). Olympia : Washington State Department of Transportation. pp. 524 -- 585. Jump up ^ Distance calculated using Microsoft MapPoint mapping software. Jump up ^ Wisconsin Department of Transportation. `` Wisconsin Highway Trivia ''. Wisconsin Department of Transportation. Archived from the original on August 6, 2007. Retrieved October 2007. Check date values in : access - date = ( help ) Jump up ^ `` WYDOT Reference Marker Book November 2004 '' ( PDF ). Wyoming Department of Transportation. Archived from the original ( PDF ) on July 17, 2011. Retrieved October 31, 2011. External links Media related to State highways in the United States at Wikimedia Commons Retrieved from `` https://en.wikipedia.org/w/index.php?title=List_of_longest_state_highways_in_the_United_States&oldid=838877231 '' Categories : State highways in the United States United States - related lists of superlatives Hidden categories : CS1 errors : dates All articles with dead external links Articles with dead external links from December 2013 Wikipedia articles needing page number citations from December 2015 Pages with login required references or sources Webarchive template wayback links Use mdy dates from December 2015 Articles with obsolete information from February 2012 All Wikipedia articles in need of updating Articles containing potentially dated statements from 2007 All articles containing potentially dated statements All accuracy disputes Articles with disputed statements from January 2015 All articles with unsourced statements Articles with unsourced statements from October 2007 Commons category without a link on Wikidata Talk Contents About Wikipedia Add links This page was last edited on 29 April 2018, at 21 : 21. 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Question: what is the longest straight road in the united states
Answer: Highway 200