State Highway 156, abbreviated SH-156, is a highway maintained by the U.S. state of Oklahoma. Spanning 16.91 miles (27.21 km) through the north-central part of the state, it connects the town of Marland, Oklahoma to US-60/US-77/US-177 in the north to US-77 in the west. It is the former alignment of US-77.
^Oklahoma Department of Transportation (2010–2011). Control Section Maps: Noble County(PDF) (Map) (2010–2011 ed.). Scale not given. Oklahoma City: Oklahoma Department of Transportation. Retrieved February 11, 2013.
^Oklahoma Department of Transportation (2010–2011). Control Section Maps: Kay County(PDF) (Map) (2010–2011 ed.). Scale not given. Oklahoma City: Oklahoma Department of Transportation. Retrieved February 11, 2013.