2021 New York state elections
On June 22, 2021, the primary elections for the Democratic and Republican primaries were held. The 2021 primaries were the first New York City mayoral election primaries to use ranked-choice voting rather than the plurality voting of previous primaries. On election night, Guardian Angels founder and radio talk show host Curtis Sliwa won the Republican primary with 67.9% of the vote, defeating New York State Federation of Taxi Drivers founder Fernando Mateo. Brooklyn Borough President and former police officer Eric Adams had a lead on election night in the Democratic primary but did not reach 50% of the vote, meaning that ranked-choice voting would come into play. In the final round of tabulation of the ranked-choice vote in the Democratic primary, Adams defeated former New York City Department of Sanitation Commissioner Kathryn Garcia, 50.4%–49.6%.
In the general election, Adams handily defeated Sliwa with 67.0% of the vote to become the 110th mayor of New York City and the city's second black mayor, after David Dinkins.
== Background ==
New York City used proportional representation (single transferable voting) from 1937 to 1947. Such a system produced benefits to voters and elected a more diverse city council than had been produced under first-past-the-post voting before and after.