Alabama State Route 51
|Maintained by ALDOT|
|Length:||114.183 mi (183.760 km)|
|Existed:||1940 – present|
|South end:||US 84 at New Brockton|
| US 231 in northwestern Dale County
US 82 at Midway
US 80 at Marvyn
|North end:||I‑85 / US 29 / US 280 at Opelika|
|Counties:||Coffee, Dale, Barbour, Bullock, Macon, Russell, Lee|
State Route 51 (SR 51) is a 114.183-mile-long (183.760 km) state highway in the southeastern and east-central parts of the U.S. state of Alabama. The southern terminus of the highway is at an intersection with U.S. Route 84 (US 84) near New Brockton. The northern terminus of the highway is at an interchange with I-85/US 29/US 280 at Opelika.
While it is signed as a north–south route, the orientation of SR 51 is rather irregular. From its southern terminus near New Brockton, the highway heads in a northeasterly direction, traveling through rural areas and small towns in the southeastern part of the state.
SR 51 travels through Clio, the birthplace of former Alabama governor George C. Wallace and Baseball Hall of Fame member Don Sutton. At Clio, the highway turns briefly turns northward, then resumes its northward trajectory as it heads towards Clayton. At Clayton, the highway then turns northwestward then northward as it heads towards Midway.
At Midway, SR 51 joins US 82 and turns westward. The concurrency of the two highways ends east of Union Springs. SR 51 then resumes a northeastward trajectory until it approaches Hurtsboro. The highway then turns northward, continuing this orientation until it reaches its northern terminus at Opelika.
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When SR 51 was formed in 1940, it covered only the route between Clayton and Midway. The highway was extended to its current southern terminus in 1957, and was extended to its current northern terminus in 1986.
|Coffee||Enterprise||0.000||0.000||US 84 (SR 12) – Enterprise||Southern terminus|
|Clintonville||4.427||7.125||SR 122 west – New Brockton|
|||5.779||9.300||SR 167 south – Enterprise||South end of SR 167 concurrency|
|||5.888||9.476||SR 167 north – Troy||North end of SR 167 concurrency|
|Dale||||19.254||30.986||US 231 (SR 53) – Troy, Ozark|
|Ariton||22.725||36.572||SR 123 north – Troy||South end of SR 123 concurrency|
|23.167||37.284||SR 123 south – Ozark||North end of SR 123 concurrency|
|Barbour||Clio||33.584||54.048||SR 10 – Brundidge, Abbeville|
|Louisville||39.738||63.952||SR 130 west – Troy|
|Clayton||48.695||78.367||SR 30 east – Eufaula|
|49.064||78.961||SR 239 south to SR 30 / West Louisville Avenue – Clayton, Eufaula||South end of SR 239 concurrency|
|49.933||80.359||SR 239 north / North Midway Street – Smuteye, Clayton, Ventress Correctional Facility||North end of SR 239 concurrency|
|Bullock||Midway||64.901||104.448||US 82 east (SR 6) / CR 47 north – Eufaula||South end of US 82/SR 6 concurrency|
|||71.560||115.165||US 82 west (SR 6) – Union Springs, Montgomery||North end of US 82/SR 6 concurrency|
||No major junctions|
|Russell||Hurtsboro||85.781||138.051||SR 26 east to CR 49 / Main Street – Seale|
|Lee||Marvyn||100.356||161.507||US 80 (SR 8)|
|Opelika||113.598||182.818||SR 169 south – Crawford[disambiguation needed]|
|114.183||183.760||I‑85 / US 29 / US 280 (SR 15 / SR 38) – Montgomery, Atlanta||Northern terminus; I-85 exit 60|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi