State Route 148 (SR 148) is an east–west state highway in eastern Ohio. Existing entirely in the southern portion of Belmont County, State Route 148 has its western terminus at State Route 800 approximately 2 miles (3.2 km) south of Barnesville. The eastern terminus of State Route 148 is at State Route 7 in Powhatan Point. From the State Route 26 intersection easterly to its endpoint at State Route 7, State Route 148 generally runs in parallel to the Captina Creek.

In Powhatan Point, State Route 148 intersects State Route 7 twice. The signed portion of State Route 148 comes to an end at the first (southern) intersection with State Route 7. However, the Ohio Department of Transportation defines State Route 148 as continuing as an un-signed route through Powhatan Point, following Front Street, Water Street, Fillmore Street, Second Street and Main Street through the village to its defined eastern terminus at its northern junction with State Route 7 in the northern end of the village.

No part of State Route 148 is incorporated within the National Highway System.

The entire route is in Belmont County.