K-63 is an approximately state highway in the U.S. state of Kansas. It is a north–south highway that serves small towns in the northeast part of the state. K-63's southern terminus is at U.S. Route 24 (US-24) in St. Marys and the northern terminus is a continuation as Nebraska Highway 50 (N-50) at the Nebraska border. The highway passes mostly through rural farmlands, however it does pass through the cities of Emmett, Havensville and Corning. It also passes along the edge of Seneca, where it has a short overlap with US-36.
