List of longest state highways in the United States

In the United States, each state maintains its own system of state highways.Some states internally number the Interstate Highways and U.S. Highways within their state as state highways; these are not counted in the list. This is a list of the longest state highways in each state. , the longest state highway in the nation is Montana Highway 200, which is long. The shortest of the longest state highways is District of Columbia Route 295, which is long.

List of highways +Longest state highways by stateStateHighwayReferencesAlabama State Route 17Alaska Route 1Arizona State Route 87Arkansas Highway 7California State Route 1Colorado State Highway 14Connecticut Route 15Delaware Route 1District of Columbia Route 295DC-295 is the only non-national route in the district.Florida State Road A1AThe multiple segments of FL A1A consist Florida's longest signed state highway, but FL 5 (the almost entirely unsigned designation for the US 1) is longer at Georgia State Route 11Hawaii Route 11Idaho State Highway 75Illinois Route 1Indiana State Road 62Iowa Highway 3Kansas K-4Kentucky Route 80Louisiana LA 1Maine State Route 11Maryland Route 2, 2005Massachusetts Route 28Michigan M-28Minnesota State Highway 1Mississippi Highway 15Missouri Route 5Montana Highway 200Nebraska Highway 92Nevada State Route 318New Hampshire Route 16New Jersey Route 47Route 47 is New Jersey's longest signed state highway, but Route 444 (the unsigned designation for the Garden State Parkway) is longer at New Mexico State Road 120New York State Route 17North Carolina Highway 24North Dakota Highway 200Ohio State Route 7Oklahoma State Highway 3OK-3's length was computed using OK-3E, the older (and longer) of its two forks.Oregon Route 140 (primarily the Digital Video Log)Pennsylvania Route 18Calculated using DeLorme Street Atlas USA softwareRhode Island Route 138South Carolina Highway 9South Dakota Highway 34Tennessee State Route 1Texas State Highway 16Utah State Route 24Vermont Route 100Virginia State Route 40Washington State Route 20West Virginia Route 20Distance calculated using Microsoft MapPoint mapping software.Wisconsin Highway 35Wyoming Highway 789

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