Minnesota State Highway 73 (MN 73) is a 119.697-mile-long (192.634 km) highway in northeast Minnesota, which runs from its interchange with Interstate Highway 35 in Moose Lake and continues north to its northern terminus at its intersection with U.S. Highway 53 in Field Township near Cook and Orr.

Highway 73 serves as a north–south route in northeast Minnesota between Moose Lake, Kettle River, Cromwell, Floodwood, Hibbing, and Chisholm.

The roadway passes through the Sturgeon River State Forest and the Superior National Forest, both north of Chisholm, in Saint Louis County.

The last segments paved in the mid-1950s were south of Hibbing.

[3] The Highway 73 designation was extended south through Moose Lake, partially along old U.S. 61, to Interstate 35 in the mid-1970s.