State Highway 203 is a nearly 40-mile (64 km) state highway in the U.S. state of Texas. It runs through the Texas panhandle from Hedley to the Oklahoma state line.

Quick Facts State Highway 203, Route information ...

State Highway 203
SH 203, highlighted in red
Route information
Maintained by TxDOT
Length	39.837 mi[1] (64.111 km)
Existed	by 1934[1]–present
Major junctions
West end	US 287 in Hedley
Major intersections	FM 1547 at Quail US 83 in Wellington
East end	SH-9 towards Mangum, OK
Location
Country	United States
State	Texas
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← SH 202 → SH 204

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SH 203 was added to the state highway system by 1919, as part of SH 13; the former alignment of SH 13 via Wheeler became SH 33 and is now SH 152.^[2][3][4] By 1926, SH 13 had taken the alignment that became US 66, while the route through Wellington became SH 52.^[5] On March 13, 1934, the part of SH 52 east of Wellington remained, but the highway west of Wellington was renumbered SH 203, along with a proposed^[6][7] route from Wellington to the state line near Dodson. On June 23, 1945, the state designated the route via Dodson as part of Farm to Market Road 338, causing this section of SH 203 to conflict in designation. SH 203 was rerouted on September 26, 1945 to absorb the rest of SH 52, as the old route was already part of FM 338.^[1][8][9] There have been no changes to the routing of SH 203 since 1945.

SH 203 heads northeastward from Hedley. It meets the beginning of SH 273 after leaving that town. SH 203 then turns more easterly and passes through Quail. North of Wellington, it overlaps US 83. It then ends at the Oklahoma state line, where it becomes Oklahoma State Highway 9.