Minnesota has same-day registration and does not have registration by party. Party preference is declared when requesting a primary ballot, and the preference is publicly recorded.

Tuesday 3 March 2020 (presumably): Minnesota Primary. Hours 7:00a-8:00p CST (1300-0200 UTC). Voting begins at 10:00 AM in some townships. Delegate Selection: Winner-Take-Most Primary. Voter Eligibility: Closed Primary.

Source: Minnesota Secretary of State.
Status: Official. Retrieved: Friday 20 March 2020.
Included in Nationwide vote.

All 39 of Minnesota's delegates to the Republican National Convention are bound to presidential contenders based on the results of the voting in today's Minnesota Presidential.

If a candidate receives 85% or more of the statewide vote, that candidate receives all 39 Congressional District and At-Large delegates. Otherwise:

• 24 district delegates are to be allocated proportionally to presidential contenders based on the Primary results in each congressional district. A mandatory 10% threshold (if no candidate receives 10%, the threshold is 0%) is required in order for a presidential contender to be allocated National Convention delegates at the congressional district level.
• 15 statewide delegates (10 at-large, 2 bonus, plus the 3 party leaders [the National Committeeman, the National Committeewoman, and the chairman of the Republican Party of Minnesota]) are to be allocated to presidential contenders based on the Primary vote statewide. A mandatory 10% threshold (if no candidate receives 10%, the threshold is 0%) is required in order for a presidential contender to be allocated National Convention delegates at the statewide level.

Rounding of the CD and statewide delegates:

• For each candidate who has reached the threshold, starting with the candidate who received the highest number of votes, multiply 3 (delegates per CD) or 15 (delegates statewide) by the number of votes received by that candidate and divide by the total number of votes cast for all presidential candidates who also reached the threshold and round to the nearest whole number.
• Continue until all delegates are allocated.
• If one or more delegates remain unallocated, allocate one delegate to each candidate not previously rounded up, in the order of the greatest remaining fraction less than 0.5, until all delegates have been allocated.

Primary
Source: Minnesota Secretary of State.
Status: Official. Retrieved: Friday 20 March 2020.

: Winner-take-all for Trump.

National convention delegates are bound on the first ballot at the national convention. On all subsequent ballots, the delegates are unbound. If a candidate withdraws, the delegates for that candidate become unbound. If a candidate withdraws and then returns to the race, the delegates are once again bound.

Saturday 7 March - Saturday 28 March 2020: Republican Party BPOU [="Basic Political Organization Unit"] Conventions convene in each BPOU. Each BPOU [either a County, State Senate District or State House District] Convention chooses delegates to both the Congressional District Conventions and the State Convention.

• BPOU Conventions choose both the BPOU's delegates to the Republican Party Convention of the Congressional District the BPOU is a part of as well as the BPOU's delegates to the Minnesota State Republican Convention. There is no formal system applied in the BPOU Convention to relate the presidential preference of the BPOU Convention delegates to the choice of the BPOU's delegates to either the Congressional District Convention in which the BPOU is located or the State Convention. The delegates in attendance at each BPOU Convention alone determine if presidential preference is to be a factor and, if so, how it is to be applied.

Sunday 29 March - Saturday 2 May 2020: Republican Party District Conventions convene in each congressional district elect delegates to the Republican National Convention according to the results of the Presidential Primary.

Friday 15 May - Saturday 16 May 2020: The Minnesota State Republican Convention officially convenes in Rochester. The State Convention chooses the 12 at-large delegates (10 base at-large delegates plus 2 bonus delegates) to the Republican National Convention according to the results of the Presidential Primary.

In addition, 3 party leaders, the National Committeeman, the National Committeewoman, and the chairman of the Republican Party of Minnesota, will attend the convention as pledged delegates by virtue of their position.