Counties Passed through: Harper, Kingman, Reno, Rice, Ellsworth, Lincoln, Mitchell, Jewell
K-14 initially ran from K-44 at Anthony to the Nebraska border near Superior. By 1932, K-44 west of Anthony was re-designated as K-14. By 1932, K-14 was hard surfaced along the segment duplexed with K-96 from Sterling to Lyons, and gravel from the Oklahoma State line to Harper, in central Kingman county, from Lyons to Lincoln, and from Beloit to Manketo. The segment between Anthony and Harper was hard-surfaced by 1933.
By 1936, a new diagonal route was built between Crisfield and Kiowa as a dirt road, and the segment from Beloit to Mankato was hard-surfaced. By 1940, the Kiowa diagonal was graveled, and was hard-surfaced between Lincoln and Beloit. By 1945, 14 was hard-surfaced between the State Line and Anthony, and between US 50S and K-4; The segment between Mankato and Superior was also graveled. By 1950, K-14 was hard surfaced between Anthony and Kingman and between Mankato and Superior. The remaining dirt and gravel sections of K-14 were hard surfaced by 1956.
By 1962, the segment between the Oklahoma line and Anthony was given the joint designation of K-2/K-14. By 1995, the segment west of Anthony was re-designated solely as K-2.