2020 Milwaukee mayoral election

• Tom Barrett, incumbent mayor[3][4][5]
• Paul Rasky[3][5][6]
• Lena Taylor, State Senator from the 4th District[3][5][7][8][9][10][11]
• Tony Zielinski, alderman from the 14th district[3][5][8][10][11][12][13][14]

• David D. King,[15] candidate for District 9 Milwaukee city councilor in 2016 [16]
• Ramone Williams[15]

• Daniel Crowley[3][17][18]
• Theresa Garner[3][17]
• David D. King,[3][17] candidate for District 9 Milwaukee city councilor in 2016[16] subsequently ran as write-in
• Tremell Noble,[3][17] applicant to fill the Milwaukee County Sheriff vacancy in 2017[19]
• Ramone Williams[3][17][20] subsequently ran as write-in

• Ashanti Hamilton, Milwaukee Common Council president[8][11][12][21][22][23]

On March 23, citing concerns of the COVID-19 pandemic in the United States, Mayor Barrett sent a letter to Governor Tony Evers, State Senate Majority Leader Scott L. Fitzgerald and Speaker of the State House Robin Vos, requesting that the April 7 elections (including the mayoral election, as well as Wisconsin's presidential primaries and others races) be conducted using mail-in ballots only.[34]

City officials urged voters not to vote in person and to instead vote by mail with absentee ballots.[35] On March 31, Milwaukee Election Commission Executive Director Neil Albrecht announced that rather than the usual 180 voting sites, the election will instead have only between ten and twelve in-person voting sites.[35][36] This was due to a severe lack of poll workers.[37] By April 3, the number of in-person polling places was further reduced to only five.[38] Ultimately, 96,712 absentee ballots were requested, and 77,729 were returned (it is not yet reported how many are valid).[39]

On April 1, Judge William M. Conley ruled that, due to the circumstances of the elections, absentee ballots would be allowed to be returned until April 13, despite the elections taking place on April 7.[40] Days after, the Republican National Committee urged the Supreme Court of the United States to block this ruling.[41] He also removed the requirement for ballots to have witness signatures, citing difficulties with regards to individuals living alone during the stay-at-home order being unable to find a witness.[42] The Supreme Court of the United States, on April 6, overturned Conley's ruling, meaning that all absentee ballots must be turned in by the election day, and ballots without witness signatures would be invalidated.[42][43] However, the Supreme Court of the United States did not overturn Conley's ruling that results would not be reported until April 13.[44]

Governor Evers, in early April, urged the state legislature to postpone the April 7 elections in Wisconsin. However, the legislature did not take the action to do this.[41] Despite admitting that he would violate the law by doing so,[45] on April 6, Evers issued an executive order which, if enforced, would have postponed the April 7 elections until the tentative date of June 7.[46] Republican leaders immediately announced that they would challenge the order in the Wisconsin Supreme Court.[46] The Wisconsin Supreme Court ruled that Evers did not have the authority to postpone the elections, thus meaning that Evers' executive order was nullified, and that the elections would be held as scheduled on April 7.[47]

On April 4, Lena Taylor filed a lawsuit attempting to get the mayoral election moved to September 8.[48]

By the time the Election Day voting concluded, Milwaukee Election Commissioner Neil Albrecht stated that despite some of the problems, the in-person voting ran smoothly.[49]

• Tom Barrett, incumbent mayor
• Lena Taylor, State Senator from the 4th District

77,729 mail-in ballots were returned, and 18,803 in-person votes were cast in the city of Milwaukee.[39][53][54]