K-150 is a 16.645-mile (26.788 km) east–west state highway in the U.S. state of Kansas. The route begins at a roundabout with U.S. Route 56 (US-56) and US-77 northeast of Marion and runs east to a junction with US-50 southwest of Elmdale. It runs through the Flint Hills region of Kansas, and is a two-lane road its entire length. There are no cities or towns along the road, but it provides a direct link for traffic from Marion, Hillsboro, McPherson and points west to Emporia and the Kansas Turnpike.