The following highways are numbered 242:
Canada Manitoba Provincial Road 242 Nova Scotia Route 242 Prince Edward Island Route 242
Costa Rica National Route 242
Cuba
Puerta de Golpe–Alonso Rojas Road (1–242)
Germany Bundesstraße 242
Greece A242 expressway, a short spur of the A24 towards Thessaloniki Airport
Japan Japan National Route 242
United Kingdom road B242 road
United States Arkansas Highway 242 California State Route 242 Georgia State Route 242 Illinois Route 242 Iowa Highway 242 (former) Kentucky Route 242 Maryland Route 242 Minnesota State Highway 242 Missouri Route 242 Montana Secondary Highway 242 (former) New York State Route 242 North Carolina Highway 242 Ohio State Route 242 Oregon Route 242 Pennsylvania Route 242 (former) Tennessee State Route 242 Texas State Highway 242 Texas State Highway Spur 242 Farm to Market Road 242 (Texas) Utah State Route 242 (former) Vermont Route 242 Virginia State Route 242