The 2021 New York City borough president elections were held on November 2, 2021. Four of the five incumbent borough presidents were unable to run for reelection due to term limits. Only the Queens borough president was eligible to seek re-election after winning a special election in 2020.

The borough presidents are the chief executives of the five boroughs of New York City. For most of the city's history, the office exercised significant executive powers within each borough, and the five borough presidents also sat on the New York City Board of Estimate. Since 1990, the borough presidents have been stripped of a majority of their powers in the government of New York City.