State Highway 23 (SH 23) is a state highway in the U.S. state of Texas maintained by the Texas Department of Transportation (TxDOT). The highway, located in eastern Lipscomb County in the Texas Panhandle, begins at US 83 northwest of Canadian and extends northward through the town of Booker to the Oklahoma state line. The highway's route designation is numerically continuous with subsequent routes in Oklahoma and Kansas and, together with Oklahoma State Highway 23 and Kansas Highway 23, forms part of a single route from US 83 in Texas to US-83 near Selden, Kansas.