Original Kansas Highway
Re-designated K-51 January 7, 1937.
West Endpoint:
East Endpoint:
Counties Passed through: Morton, Stevens, Meade, Clark, Comanche, Kiowa, Barber, Harper, Sumner, Cowley, Chautauqua, Montgomery, Labette, Cherokee
Re-designated K-51 January 7, 1937.
West Endpoint:
Junction K-27 at Elkhart (1927-1928)
Junction K-27 at Richfield (1928-1937)
Junction K-27 at Richfield (1928-1937)
East Endpoint:
Counties Passed through: Morton, Stevens, Meade, Clark, Comanche, Kiowa, Barber, Harper, Sumner, Cowley, Chautauqua, Montgomery, Labette, Cherokee
History
K-12 was as original Kansas Highway across the southern tier of counties.
In 1930, a new US highway, US 160 was created. 160 would supplant K-12 east of Meade as well as along the concurrancy with US 54 between US 83 and Meade. The segment between Richfield and US 54 remained until it was re-designated as an extension of K-51 in 1937.