Texas State Highway 15
|Maintained by TxDOT|
|Length:||125.2 mi (201.5 km)|
|Existed:||1959 – present|
|West end:||US 54 at Stratford|
|US 83 in Perryton|
|East end:||SH-15 east of Follett|
In 1955, SH 117 was redesignated as SH 15 for its entire route from the Texas/Oklahoma state line in Lipscomb County through the northeast Panhandle to an intersection with U.S. Highway 287 at Claude. The route was renumbered to correspond to the connecting Oklahoma State Highway 15. In 1967 the section from Spearman southward was redesignated as SH 20, while SH 15 was rerouted westward to Stratford over cancelled routes SH 282 and FM 289.
SH 15 begins at an intersection with US 54 in Stratford. It travels eastward through the far northern reaches of the Texas Panhandle, mainly through farmlands. The route passes through the towns of Spearman and Perryton, before exiting eastward into Northwest Oklahoma, where the road transitions to Oklahoma State Highway 15.
SH 15 was one of the original twenty six state highways proposed in 1917, overlaid on top of the Dallas-Louisiana Highway. From 1919 the routing mostly followed present day U.S. Highway 80 from Dallas to Wills Point. It continued on, routed along present day SH 64 from Wills Point into Tyler and up U.S. Highway 271 into Longview.
By 1919, like many other highways at the time, a second routing, SH 15A was assigned, from Wills Point, through Mineola to Longview, via US 80. By 1922, H 15 and SH 15A swapped places.
In 1926, U.S. Highway 80 was routed over SH 15 and its northern routing. While the routes were marked concurrently, SH 15A into Tyler was given over to the newly created SH 64. SH 15 was extended east to the Louisiana border. replacing a section of SH 11. By 1936, SH 15 was extended west via Albany via Seminole to the Texas-New Mexico boundary, replacing SH 83 and part of SH 1A. By 1939, the section of SH 15 east of Albany was deleted. This highway was redesignated as US 180 in 1943.
|Sherman||Stratford||US 54 (Texas Street)|
|Gruver||SH 136 (Main Avenue)|
|Loop 84 (4th Street)|
|SH 207||West end of TX 207 concurrency|
|Spearman||SH 207 (Collard Street) / FM 760||East end of TX 207 concurrency|
|US 83 (Main Street)|