Iowa Highway 31

Iowa Highway 31
Iowa 31 highlighted in red
Route information
Maintained by Iowa DOT
Length	38.856 mi[1] (62.533 km)
Major junctions
South end	Iowa 141 / CR L12 at Smithland
Major intersections	US 20 at Correctionville
North end	US 59 / CR C63 near Quimby
Location
Country	United States
State	Iowa
Counties	Woodbury Ida Cherokee
Highway system
Iowa Primary Highway System Interstate US State Secondary Scenic
← US 30 → Iowa 32

Iowa Highway 31 (Iowa 31) is a diagonal state highway which runs from Iowa Highway 141 (Iowa 141) in Smithland to U.S. Highway 59 (US 59) east of Quimby. For most of its length, the highway runs parallel to the Little Sioux River. Since its designation, the route has changed very little. The route was paved by the mid-1960s.