Minnesota State Highway 1 (MN 1) is a state highway across northern Minnesota, United States, which runs from North Dakota Highway 54 (ND 54) at the North Dakota state line (at the Red River in Oslo) and continues east to its eastern terminus at MN 61 at the unincorporated community of Illgen City in Beaver Bay Township on the North Shore of Lake Superior.

At 346 miles (557 km) in length, MN 1 is the longest state route in Minnesota.

[1] MN 1 serves as an east–west route between Oslo, Warren, Thief River Falls, Red Lake, Northome, Cook, Tower, Ely, and Beaver Bay Township.

The roadway passes through the following forests: The route runs concurrently with MN 169 for 26 miles (42 km) from Vermilion Lake Township (west of Tower) to Ely.

[citation needed] Most of MN 1 was authorized in 1933,[3] except for a section between U.S. Highway 75 (US 75) and MN 32 at Thief River Falls, which was part of Minnesota Constitutional Route 33 authorized in 1920.