Iowa Highway 21
|Maintained by Iowa DOT|
|Length:||97.152 mi (156.351 km)|
|South end:||Iowa 149 near Hedrick|
|North end:||US 20 / Iowa 27 at Waterloo|
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.
Iowa 21 begins one mile (1.6 km) west of Hedrick and goes north through Delta before intersecting Iowa 92. It proceeds through What Cheer before intersecting Iowa 22 west of Thornburg. It continues north to Deep River where it intersects Iowa 85. After passing through Guernsey, it then intersects Interstate 80, then meets US 6. It overlaps with U.S. 6 going eastward, then turns north near Victor. It then intersects Iowa 212 before entering Belle Plaine, then intersects US 30. It goes north to Dysart, where it turns west, overlapping with Iowa 8. It then turns north and ends at US 20 at the southern city limit of Waterloo.
The current Iowa 21 was created in October 1934 and went between Victor and Dysart. It was extended south in 1939 to from Victor to Iowa 92, north from Dysart to U.S. 20 in Waterloo in 1969, and south again from Iowa 92 to Iowa 149 in 1980.
|Thornburg||20.311||32.687||Iowa 22 east|
|Poweshiek||Deep River Township||28.958||46.603||Iowa 85 west / CR F52 east|
|40.619||65.370||US 6 west||South end of US 6 overlap|
|Iowa||Hartford Township||44.852||72.182||US 6 east||North end of US 6 overlap|
|Honey Creek Township||52.030||83.734||Iowa 212 east|
|Dysart||75.773||121.945||Iowa 8 east / CR V37 north||South end of Iowa 8 overlap|
|Tama||Clark Township||76.262||122.732||Iowa 8 west||North end of Iowa 8 overlap|
|Black Hawk||Waterloo||97.152||156.351||US 20 / Iowa 27|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- "2009 Volume of Traffic on the Primary Road System of Iowa" (PDF). Iowa Department of Transportation. January 1, 2009. Retrieved January 14, 2011.