Minnesota State Highway 139

Trunk Highway 139
MN 139 highlighted in red
Route information
Maintained by MnDOT
Length	3.913 mi (6.297 km)
Existed	April 22, 1933[1]–present
Major junctions
South end	Iowa 139 at the Iowa state line near Harmony
North end	US 52 at Harmony
Location
Country	United States
State	Minnesota
Counties	Fillmore
Highway system
Minnesota Trunk Highway System Interstate US State Legislative Scenic
← MN 135 → MN 149

Minnesota State Highway 139 (MN 139) is a 3.913-mile-long (6.297 km) highway in southeast Minnesota, which runs from Iowa Highway 139 at the Iowa state line and continues north to its northern terminus at its intersection with U.S. Highway 52 in Harmony.

Highway 139 passes through the city of Harmony and Harmony Township.