Minnesota State Highway 257 (MN 257) is a 3.991-mile-long (6.423 km) highway in southwest Minnesota, which runs from its intersection with Brown County State-Aid Highway 20 (Broadway Avenue) in the city of Hanska and continues east to its eastern terminus at its intersection with State Highway 15 in Linden Township, 6 miles north of Madelia.

Highway 257 serves as a short east–west connector route in southwest Minnesota between the city of Hanska and State Highway 15.

It passes around the north side of Linden Lake in Linden Township.

[3] Highway 257 was authorized on July 1, 1949.

[4][5] The entire route is in Brown County.