| Election Name: | 1956 United States Senate election in Wisconsin |
| Country: | Wisconsin |
| Flag Year: | 1913 |
| Type: | presidential |
| Ongoing: | Yes |
| Previous Election: | 1950 United States Senate election in Wisconsin |
| Previous Year: | 1950 |
| Next Election: | 1962 United States Senate election in Wisconsin |
| Next Year: | 1962 |
| Election Date: | November 6, 1956 |
| Image1: | Image:Alexander Wiley.jpg |
| Nominee1: | Alexander Wiley |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 892,473 |
| Percentage1: | 58.59% |
| Nominee2: | Henry Maier |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 627,903 |
| Percentage2: | 41.22% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Election: | Alexander Wiley |
| Before Party: | Republican Party (United States) |
| After Election: | Alexander Wiley |
| After Party: | Republican Party (United States) |
The 1956 United States Senate election in Wisconsin was held on November 6, 1956. Incumbent Republican U.S. Senator Alexander Wiley was re-elected to a fourth term in office. He survived a close primary challenge from U.S. Representative Glenn R. Davis before defeating Henry Maier in the general election. This election marks the last Senate election in Wisconsin to date in which the Republican candidate won Milwaukee County.