Ohio State Route 274 is an east-west route in west-central Ohio. It begins just west of Ridgeway, at Ohio Route 273 in northern Logan County. It runs southwesterly to Rushsylvania, and then it goes west. After passing US Route 33 in Huntsville, Ohio, it reaches a latitude that it will follow for another 35 miles without a curve. It goes straight west, through the towns of Jackson Center, Kettlersville, New Bremen, and Chickasaw. Ohio Route 274 ends at its westernmost extent, an intersection with US Route 127 south of Celina.