Opinion polling for the 2020 Republican Party presidential primaries

This is a list of nationwide and statewide public opinion polls that have been conducted relating to the Republican primaries for the 2020 United States presidential election. The persons named in the polls are declared candidates or have received media speculation about their possible candidacy. The polls included are among Republicans or Republicans and Republican-leaning independents. If multiple versions of polls are provided, the version among likely voters is prioritized, then registered voters, then adults.
Statewide polling.
The statewide polls are ordered by the scheduled date of the state's primary or caucus. Polls with a sample size of <100 have their 'sample size' cells marked in red to indicate a lack of reliability.
Iowa caucus.
The Iowa Republican caucus will take place on Monday, February 3, 2020.
New Hampshire primary.
The New Hampshire Republican primary will take place on Tuesday, February 11, 2020.
Nevada caucus.
The Nevada caucus was cancelled by the Nevada Republican Party in a vote on September 7, 2019.
South Carolina primary.
The South Carolina primary was cancelled in a vote by the South Carolina Republican Party on September 7, 2019.
California primary.
The California Republican primary will take place on Tuesday, March 3, 2020.
Colorado primary.
The Colorado Republican primary will take place on Tuesday, March 3, 2020.
Massachusetts primary.
The Massachusetts Republican primary will take place on Tuesday, March 3, 2020.
North Carolina primary.
The North Carolina Republican primary will take place on Tuesday, March 3, 2020.
Texas primary.
The Texas Republican primary will take place on Tuesday, March 3, 2020.
Utah primary.
The Utah Republican primary took place in Tuesday, March 3, 2020.
Vermont primary.
The Vermont Republican primary took place on Tuesday, March 3, 2020.
Wyoming caucuses.
The last presidential cycle's Wyoming caucuses took place on March 1 in 2016 and would, if scheduled for Super Tuesday in 2020, take place on March 3, 2020. Instead, the Wyoming Republican state convention was scheduled for May 9, 2020.
Michigan primary.
The Michigan Republican primary took place on Tuesday, March 10, 2020.
Illinois primary.
The Illinois Republican primary took place on Tuesday, March 17, 2020.
Ohio primary.
The Ohio Republican primary will take place on Tuesday, March 10, 2020.
Florida primary.
The Florida Republican primary will take place on Tuesday, March 17, 2020.
Wisconsin primary.
The Wisconsin Republican primary will take place on Tuesday, April 7, 2020.
Arizona primary.
The Arizona 2016 Republican primary was held on March 22, 2016, but the 2020 primary was cancelled on September 9, 2019.
Delaware primary.
The Delaware Republican primary will take place on Tuesday, April 28, 2020.
Maryland primary.
The Maryland Republican primary will take place on Tuesday, April 28, 2020.
Pennsylvania primary.
The Pennsylvania Republican primary will take place on Tuesday, April 28, 2020.