| United States Numbered Highways of the Iowa Primary Highway System | |
| Caption: | Highway markers from different years for former US 32 (1926), US 75 (1961) and current US 151 (1971) |
| Us: | US Highway nn (US nn) |
| Map Custom: | yes |
| Map Notes: | U.S. Highways in Iowa highlighted in red |
| Length Mi: | 3627 |
| Formed: | November 11, 1926[1] |
| Links: | IA |
