2025 New York City Democratic mayoral primary

The Democratic Party primary for the 2025 New York City mayoral election took place on June 24, 2025. Voters ranked up to five candidates using ranked-choice voting. The early voting period began on June 14. Incumbent mayor Eric Adams did not run in the primary, instead choosing to compete for re-election as an independent in the general contest.

First-choice results on election night showed State Assemblyman Zohran Mamdani had a large lead ahead of former governor Andrew Cuomo. Cuomo conceded the race to Mamdani in what was considered to be a major upset victory. In July, ranked-choice results showed Mamdani to be the clear winner with 56.4% of the vote, making him the official Democratic nominee in the November 4, 2025 general election, with Cuomo securing the remaining 43.6% of the vote. The primary was the largest in New York City's history, almost reaching the same turnout as the 2021 mayoral general election.

In 2019, New York City voters passed Ballot Question #1 to amend the City Charter to allow for voters the choice of ranking up to five candidates in primary and special elections for mayor, public advocate, comptroller, borough president, and city council, starting in January 2021. This primary was the second time ranked-choice voting was used in the New York City mayoral primary, following its use during the 2021 New York City Democratic mayoral primary.