Route 238 was a numbered state highway running 1.4 miles (2.3 km) in Newport, Rhode Island. Its southern terminus was at Thames Street in Newport, and its northern terminus was at Route 138 in Newport. As of 2023, this route has been retired with its entire alignment added to Route 138A.

Route 238 was a spur from Route 138 providing access to downtown Newport. It began at the intersection of Halsey Boulevard, the Newport Bridge, and the J.T. Connell Connector. It ran south along J.T. Connell Highway, Farewell Street, and America's Cup Avenue, ending at the intersection with Thames Street and Memorial Boulevard where it became Route 138A.

The entire route is in Newport, Newport County.

mi	km	Destinations	Notes
0.0	0.0	Goat Island Road – Goat Island	Southern terminus
0.8	1.3	Route 138A north (Memorial Boulevard West)	Southern terminus of RI 138A
1.7	2.7	Route 138 (Newport Pell Bridge) – Portsmouth, Jamestown	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

• 2019 Highway Map, Rhode Island