State Highway 175 or SH 175 is a state highway that runs from Montague to Nocona, Texas in Montague County, Texas. The original route was designated by 1933 between Montague and St. Jo, with a proposed extension north to Nocona as SH 59. At the time, SH 175 went from Montague to Saint Jo. By 1939, SH 59 was rerouted, so instead of going north from Montague to Nocona, it ran east from Montague to Saint Jo. The same year, SH 175 was completed from Montague to Nocona.

SH 175 begins at an intersection with SH 59 and FM 1806 in the unincorporated community of Montague in Montague County, heading north on a two-lane undivided road. The road passes homes before heading into a mix of farmland and woodland. The highway heads through rural areas for several miles before crossing into Nocona. Here, SH 175 becomes Montague Street and passes through residential areas, reaching its northern terminus at US 82 in the commercial center of town.

SH 175 was designated to run between Montague and Nocona in 1939.

The entire route is in Montague County.