| Election Name: | 1984 United States Senate election in Michigan |
| Country: | Michigan |
| Flag Image: | Flag of Michigan.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1978 United States Senate election in Michigan |
| Previous Year: | 1978 |
| Next Election: | 1990 United States Senate election in Michigan |
| Next Year: | 1990 |
| Election Date: | November 6, 1984 |
| Image1: | Carl Levin (1).jpg |
| Nominee1: | Carl Levin |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 1,915,831 |
| Percentage1: | 51.77% |
| Nominee2: | Jack Lousma |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 1,745,302 |
| Percentage2: | 47.16% |
| Map Size: | 300px |
| U.S. Senator | |
| Before Election: | Carl Levin |
| Before Party: | Democratic Party (United States) |
| After Election: | Carl Levin |
| After Party: | Democratic Party (United States) |
The 1984 United States Senate election in Michigan was held on November 6, 1984. Incumbent Democratic U.S. Senator Carl Levin won re-election to a second term, defeating Republican candidate and former astronaut Jack Lousma. Coinciding with Republican Ronald Reagan's landslide in Michigan and the rest of the country, this was the only Senate election of Levin's career in which his percentage of the vote and margin of victory decreased from the previous one.