State Highway 242 (SH 242) is a Texas state highway connecting The Woodlands and Patton Village in southeast Texas.

SH 242 begins at FM 1488 in The Woodlands. The roadway, also known locally as College Park Drive, curves to the southeast and passes to the south of W. G. Jones State Forest. It then turns to the east and crosses I-45 in the southern outskirts of Conroe. The route continues to the east, crossing FM 1314 and FM 1485, before reaching its eastern terminus at I-69 in Patton Village.

The entire route is in Montgomery County.