State Highway 128 (abbreviated SH-128) is a 9.81-mile-long (15.79 km)^[1] state highway in Le Flore County, Oklahoma. It connects U.S. Route 59 (US 59) in Heavener to the Arkansas state line, where it becomes Arkansas Highway 28. It has no lettered spur routes.

Quick Facts State Highway 128, Route information ...

State Highway 128
SH-128 highlighted in red
Route information
Maintained by ODOT
Length	9.81 mi[1] (15.79 km)
Existed	ca. 1956–present
Major junctions
West end	US 59 / US 270 in Heavener
East end	AR 28 at the Arkansas state line
Location
Country	United States
State	Oklahoma
Highway system
Oklahoma State Highway System Interstate US State Turnpikes
← SH-127 → SH-130

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SH-128 was first added to the state highway system circa 1956. It has been realigned once to better match up with roads across the Arkansas line.

State Highway 128 begins at US-59/US-270 in Heavener. From the terminus south of downtown, the highway follows West Avenue I to East 1st Street, where it turns south, running parallel to US-59/US-270. Highway 128 then curves east and exits Heavener.^[2] For the remainder of its route, SH-128 runs mostly parallel to a spur from the Kansas City Southern rail line; the road crosses the tracks once, just east of the Heavener city limit.^[3] SH-128 follows the valley of the Poteau River through east-central Le Flore County, running between the river and Poteau Mountain. At the highway's approximate midpoint, the route passes through unincorporated Forrester. From here, SH-128 follows a generally east-northeast heading before crossing the state line into Scott County, Arkansas. The road continues east toward Bates as Arkansas Highway 28.^[4]

State Highway 128 first appears on the 1957 edition of the official Oklahoma state highway map. The route has always been a paved highway. Initially, it did not connect to Highway 28 upon crossing the Arkansas state line.^[5] The route was realigned to directly connect to Highway 28 by 1961.^[6] No further changes have occurred to the highway since that time.