Back Liste der State-, U.S.- und Interstate-Highways in Iowa German Anexo:Carreteras estatales de Iowa Spanish Liste des routes d'État en Iowa French
    Highway markers from different years | |
| Highway names | |
|---|---|
| Interstates | Interstate nn (I-nn) |
| US Highways | U.S. Highway nn (US nn) |
| State | Iowa nn |
| System links | |
State highways in the U.S. state of Iowa are owned and maintained by the Iowa Department of Transportation.
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