Counties Passed through: Clark, Ford, Hodgeman, Lane, Trego, Graham, Norton
US 283 was designated from the Oklahoma line north to US 160 near Englewood, and K-21 was hard surfaced from Minneola to Dodge City, and the remainder of the route was dirt. By 1933, US 283 had been extended north to Dodge City. By 1936, K-21 was gravel from Dodge City north to the Ness/Trego county line and from WaKeeney to Hill City, and had been extended north from US 36 north to the Nebraska line. By 1938, 21 had been graveled from Hill City to the junction with K-9, and had been re-designated US 283 from Dodge City to Norton.
When the remainder of K-21 had been re-designated as US 283 in 1941, 283 had been hard-surfaced from the Oklahoma line to the junction with K-4 in Ness County, and from WaKeeney to Norton.