Iowa Highway 21
State highway in Iowa, United States / From Wikipedia, the free encyclopedia
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Iowa Highway 21 (Iowa 21) is a state highway that runs from north to south in central Iowa. It has a length of 97 miles (156 km). Iowa 21 begins at Iowa 149 west of Hedrick and ends at a freeway interchange with U.S. Highway 20 (US 20) in Waterloo.