| Election Name: | 2020 Michigan Republican presidential primary |
| Country: | Michigan |
| Type: | presidential |
| Ongoing: | No |
| Previous Election: | 2016 United States presidential election in Michigan#Republican primary |
| Previous Year: | 2016 |
| Next Year: | 2024 |
| Election Date: | March 10, 2020 |
| Outgoing Members: | ID |
| Elected Members: | MS |
| Candidate1: | Donald Trump |
| Color1: | 283681 |
| Delegate Count1: | 73 |
| Percentage1: | 93.7% |
| Popular Vote1: | 640,552 |
| Home State1: | Florida[1] |
| Candidate2: | Uncommitted |
| Color2: | 000000 |
| Home State2: | N/A |
| Delegate Count2: | 0 |
| Popular Vote2: | 32,743 |
| Percentage2: | 4.8% |
The 2020 Michigan Republican presidential primary took place on March 10, 2020, as one of five contests scheduled for that date in the Republican Party presidential primaries for the 2020 election.
Incumbent United States President Donald Trump was challenged by three candidates: former governor Mark Sanford of South Carolina, former congressman Joe Walsh of Illinois, and former governor Bill Weld of Massachusetts. Sanford and Walsh both withdrew prior to the primary. Michigan is the only primary state where Sanford's name remained on the ballot.[2] |+ style="background-color:#f2f2f2;margin-bottom:-1px;border:1px solid #aaa;padding:0.2em 0.4em" | 2020 Michigan Republican primary[3] ! style="text-align:left;" | Candidate! style="text-align:center;" | Votes! style="text-align:center;" | %! Estimated
delegates|-| (incumbent)| 640,552| 93.7%| 73|-| Uncommitted| 32,743| 4.8%| 0|-| | 6,099| 0.9%| 0|-| | 4,258| 0.6%| 0|-| | 4,067| 0.6%| 0|-! style="text-align:right;" | Total! 683,431! 100%! 73|}