U.S. Route 12

U.S. Route 12
US 12 highlighted in red
Route information
Length	2,484 mi (3,998 km)
Existed	1926–present
Major junctions
West end	US 101 at Aberdeen, WA
Major intersections	I-5 near Chehalis, WA I-15 at Helena, MT I-94 at various locations I-29 / US 81 at Summit, SD I-35W at Minneapolis, MN I-35E / US 10 / US 52 at St Paul, MN I-39 / I-90 at Madison, WI I-55 at Hodgkins, IL I-65 / I-90 at Gary, IN I-69 at Coldwater, MI
East end	Cass Avenue in Detroit, MI
Location
Country	United States
States	Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Illinois, Indiana, Michigan
Highway system
United States Numbered Highway System List Special Divided
← US 11 US 13 →

U.S. Route 12 or U.S. Highway 12 (US 12) is an east–west United States highway that goes from Aberdeen, Washington at US 101 to Detroit, Michigan at Cass Avenue. The highway is 2,484 miles (3,998 km) long. The highway is the sixth longest U.S. highway in the United States.