State Route 687 (SR 687, OH 687) is a 5.70-mile (9.17 km) long east–west state highway in the northeastern portion of the U.S. state of Ohio. Its western terminus is at State Route 241 about 4.50 miles (7.24 km) north of Massillon, and its eastern terminus is at the northern junction of Interstate 77 and U.S. Route 62 approximately 2.50 miles (4.02 km) northwest of downtown Canton.

SR 687 runs entirely within the northwestern quadrant of Stark County. This highway is not included as a part of the National Highway System (NHS). The NHS is a network of highways identified as being most important for the economy, mobility and defense of the country.

SR 687 was created in 1937. The original routing of the highway consisted of Fulton Drive from SR 236 north of Massillon to the present western terminus of SR 687 at SR 241; the entire current length of SR 687 into Canton; and Fulton Drive from the present eastern terminus of the route at I-77/SR 62 southeast into downtown Canton, where it came to an end at SR 172.

By 1995, the westernmost portion of SR 687 between SR 236 and SR 241 was removed from the state highway system. On the eastern end, jurisdiction of the portion of SR 687 between I-77/US 62 and SR 172 in Canton was transferred from the state of Ohio to the city of Canton in 2006.[citation needed]

The entire route is in Stark County.