State Highway 56
Seminole Nation Highway
Route information
Maintained by ODOT
Length	86.7 mi[1] (139.5 km)
Existed	August 28, 1929[2]–present
Major junctions
South end	US 377 / SH-3E / SH-39 / SH-99 east of Konawa
Major intersections	US 270 in Wewoka I-40 in Cromwell US 62 / SH-27 in Okemah
North end	US 75 in Okmulgee
Location
Country	United States
State	Oklahoma
Highway system
Oklahoma State Highway System Interstate US State Turnpikes
← US 56 → SH-58

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.^[2]

SH-56 begins at an intersection with US-377 four miles (6 km) east of Konawa,^[3] and extends to US-75 in Okmulgee. The highway's total length is 86.7 miles (139.5 km).^[1]

SH-56 was first added to the state highway system in 1929. It was gradually extended to its present length between then and 1942.^[2]

SH-56 begins at the junction of SH-39 and US-377/SH-3E/SH-99 four miles (6 km) east of Konawa. From here, the highway and heads east, curving through the hilly terrain of southeastern Seminole County.^[4] The highway passes through the town of Sasakwa 10 miles (16 km) east of US-377.^[3] At Sasakwa, the road turns north, crossing the Little River northeast of town and generally paralleling the Seminole–Hughes County county line.

The highway then bisects the town of Wewoka, intersecting US-270 and concurring with its business loop. SH-56 also serves as the eastern terminus of SH-59 in Wewoka. North of the town, SH-56 intersects with SH-9. The highway continues north, intersecting SH-99A in Cromwell and interchanging with I-40 near the unincorporated community of Schoolton. After crossing I-40, SH-56 makes a long arc to the east, bringing it into Okfuskee County.^[3]

Just east of the county line, SH-56 bridges the North Canadian River. South of Castle, the road intersects with SH-48. SH-56 then proceeds east into Okemah, the county seat, where it has a short concurrency with both US-62 and SH-27. The highway continues east from town, then turns north, before turning back to the east to pass through the unincorporated settlement of Okfuskee. East of Okfuskee, the highway enters Okmulgee County.

In Okmulgee County, SH-56 skirts the northern edge of Okmulgee Lake and serves Dripping Springs State Park. East of the lake, it passes through Okmulgee Wildlife Refuge and Deep Fork National Wildlife Refuge.^[4] It then enters the city of Okmulgee. There, SH-56 comes to an end at US-75. However, there is a separate loop route segment of SH-56 that starts from a more northerly point on US-75 and runs a short distance to US-62.^[5]

State Highway 56 traces its origins to August 28, 1929, its original date of commissioning. At that time, the highway only consisted of the portion of the route extending from the SH-99 junction (then SH-48) east to Sasakwa, thence north to end at SH-3 south of Wewoka.^[2][6] The highway underwent its first extension just under two years later, on June 15, 1931, when it was extended to end at US-62 in Okemah.^[2][7] The highway was extended to Okmulgee on April 13, 1942, bringing it to its current extent.^[2][8] Other than minor realignments and establishment of the Loop route segment, the highway has undergone no further changes since 1942.

County	Location	mi[1]	km	Destinations	Notes
Seminole	​	0.0	0.0	SH-39 west / US 377 / SH-3E / SH-99	Southern terminus; road continues west as SH-39
	Wewoka	23.1	37.2	US 270 / US 270 Bus. begin	Eastern terminus of US-270 Bus., southern end of US-270 Bus. concurrency
		24.2	38.9	SH-59 (14th Street)	Eastern terminus of SH-59
		25.1	40.4	US 270 Bus. west	Northern end of US-270 Bus. concurrency
	​	30.5	49.1	SH-9
	Cromwell	38.6	62.1	SH-99A
		41.2	66.3	I-40 – Oklahoma City, Ft. Smith	I-40 exit 212
Okfuskee	​	47.2	76.0	SH-48
	Okemah	51.8	83.4	US 62 east / SH-27 south (Woody Guthrie Street)	Western end of US-62/SH-27 concurrency
		52.1	83.8	US 62 west (Columbia Street) / SH-27 end	Eastern end of US-62/SH-27 concurrency, northern terminus of SH-27
Okmulgee	Okmulgee	86.7	139.5	US 75 (Wood Drive)	Northern terminus; road continues east as 6th Street
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Route transition

State Highway 56 Loop
Location	Okmulgee, Oklahoma
Existed	1962–present

State Highway 56 Loop (also known as SH-56 Loop or more commonly, Loop 56) is a bypass route around the northeast quadrant of Okmulgee, starting from US-75 in the north of Okmulgee, running in an arc east and then south, and connecting with US-62 east of the city.^[5] Although it shares its number with SH-56, it does not intersect its implied parent route. Among other functions, the highway provides access to Oklahoma State University Institute of Technology as well as the College of the Muscogee Nation. Loop 56 is 3.7 miles (6.0 km) long.^[9] It was established on May 7, 1962.^[2]

The entire route is in Okmulgee, Okmulgee County.

mi[1]	km	Destinations	Notes
0.00	0.00	US 62 (New Morris Highway)	Southern terminus
3.7	6.0	US 75 (Wood Drive)	Northern terminus; road continues west as Fairgrounds Road
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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