Oklahoma State Highway 56
| Seminole Nation Highway | ||||
| Route information | ||||
| Maintained by ODOT | ||||
| Length | 86.7 mi (139.5 km) | |||
| Existed | August 28, 1929–present | |||
| Major junctions | ||||
| South end | US 377 / SH-3E / SH-39 / SH-99 east of Konawa | |||
| North end | US 75 in Okmulgee | |||
| Location | ||||
| Country | United States | |||
| State | Oklahoma | |||
| Highway system | ||||
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State Highway 56 (abbreviated SH-56 or OK-56) is a state highway in the U.S. state of Oklahoma. The road serves Seminole County, Okfuskee County, and Okmulgee Counties in central and east-central Oklahoma. In Seminole County, it is also designated as the Seminole Nation Highway in honor of the contributions the Seminole Nation has made to the state of Oklahoma.
SH-56 begins at an intersection with US-377 four miles (6 km) east of Konawa, and extends to US-75 in Okmulgee. The highway's total length is 86.7 miles (139.5 km).
SH-56 was first added to the state highway system in 1929. It was gradually extended to its present length between then and 1942.