| Election Name: | 1972 United States Senate election in Iowa |
| Country: | Iowa |
| Flag Image: | Flag of Iowa (xrmap collection).svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1966 United States Senate election in Iowa |
| Previous Year: | 1966 |
| Next Election: | 1978 United States Senate election in Iowa |
| Next Year: | 1978 |
| Election Date: | November 7, 1972 |
| Image1: | File:Dick Clark Iowa.png |
| Nominee1: | Dick Clark |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 662,637 |
| Percentage1: | 55.07% |
| Nominee2: | Jack Miller |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 530,525 |
| Percentage2: | 44.09% |
| Map Size: | 240px |
| U.S. Senator | |
| Before Election: | Jack Miller |
| Before Party: | Republican Party (United States) |
| After Election: | Dick Clark |
| After Party: | Democratic Party (United States) |
The 1972 United States Senate election in Iowa took place on November 7, 1972. Incumbent Republican U.S. Senator Jack Miller ran for re-election to a third term but was defeated by Democrat Dick Clark. Iowa was one of fifteen states alongside Alabama, Arkansas, Colorado, Delaware, Georgia, Louisiana, Maine, Minnesota, Mississippi, Montana, New Hampshire, Rhode Island, South Dakota and West Virginia that were won by Republican president Richard Nixon in 1972 that elected Democrats to the United States Senate.