State Highway 93 (SH 93) is a numbered state highway in Texas. It covers a total of 6.56 miles (10.56 km), entirely within the city limits of Texarkana. This route was designated in 1967, when Summerhill Road was extended along the former Chance St. to an intersection with New Boston Rd. (U.S. Highway 82). The route was later extended along Lucas St. to connect with Lake Dr. at 10th St.

SH 93 includes the portion of Summerhill Road south of Interstate 30. It crosses New Boston Road, Martin Luther King Boulevard (westbound U.S. Highway 67), and 7th Street (eastbound US 67), after which it becomes Lake Drive. From there it forms a curve to the southwest and west, finally ending at Loop 151, and feeding into U.S. Highway 59.

The original SH 93 was designated in 1926 as the route from Gatesville to the "state industrial school", which was the state juvenile training and rehabilitation school for boys, a few miles north. By 1939, this route became a portion of SH 36.