Iowa Highway 12

Iowa Highway 12
Iowa 12 highlighted in red
Route information
Maintained by Iowa DOT
Length	46.212 mi[1] (74.371 km)
Existed	1920–present
Tourist routes	Loess Hills Scenic Byway
Major junctions
South end	US 20 / US 75 at Sioux City
Major intersections	I-29 / US 77 at Sioux City Iowa 3 between Westfield and Akron
North end	Iowa 10 in Hawarden
Location
Country	United States
State	Iowa
Counties	Woodbury Plymouth Sioux
Highway system
Iowa Primary Highway System Interstate US State Secondary Scenic
← Iowa 10 → Iowa 13

Iowa Highway 12 (Iowa 12) is a 46.212-mile-long (74.371 km) state highway that runs from north to south in northwestern Iowa. The highway begins in eastern Sioux City at U.S. Highway 20 (US 20) and US 75. For the first seven and a half miles (12.1 km) of the route, Iowa 12 is an unsigned highway. The first five miles (8.0 km) are signed only as U.S. Highway 20 Business; the other two and a half miles (4.0 km) are overlapped by Interstate 29 (I-29). From here, the highway lies just east of the Big Sioux River, which separates Iowa from South Dakota. The northern end of Iowa 12 is in Hawarden at an intersection with Iowa 10.