State Route 274 is a two-lane east–west state highway located in the western portion of the U.S. state of Ohio. The western terminus of State Route 274 is at a T-intersection with U.S. Route 127 approximately 4 miles (6.4 km) west of Chickasaw. Its eastern terminus is at another T-intersection, this time with State Route 273 about 3.5 miles (5.6 km) northeast of Rushsylvania.

Logan County is a county in the west central portion of the U.S. state of Ohio. As of the 2020 census, the population was 46,150. The county seat is Bellefontaine. The county is named for Benjamin Logan, who fought Native Americans in the area.