Route information | ||||
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Maintained by Iowa DOT | ||||
Length | 10.909 mi[1] (17.556 km) | |||
Major junctions | ||||
South end | US 18 / US 52 in Postville | |||
North end | Iowa 9 near Waukon | |||
Location | ||||
Country | United States | |||
State | Iowa | |||
Counties | Allamakee | |||
Highway system | ||||
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Iowa Highway 51 (Iowa 51) is a state highway that runs from north to south in northeast Iowa. Contained entirely by Allamakee County, it is only 11 miles (18 km) in length. It begins at U.S. Highway 18 (US 18) and US 52 in Postville and ends at Iowa 9 near Waukon.