Minnesota State Highway 87 (MN 87) is a 83.201-mile-long (133.899 km) highway in north-central and northwest Minnesota, which runs from its interchange with U.S. Highway 10 at Frazee and continues east to its eastern terminus at its intersection with State Highway 84 in Ponto Lake Township, 7 miles (11 km) east of Backus and 11 miles (18 km) southwest of Longville.

Highway 87 serves as an east–west route in north-central and northwest Minnesota between Frazee, Menahga, and Backus.

The route passes through the following forests: The eastern terminus of Highway 87 intersects State Highway 84 about midway between Pine River and Longville.

Highway 87 is also known as Lake Street in the city of Frazee.

Highway 87 follows Front Street and Washburn Avenue in Backus.