Bill de Blasio, American politician, 109th Mayor of New York City
Bill de Blasio (; born Warren Wilhelm Jr., May 8, 1961; later Warren de Blasio-Wilhelm) is an American politician who served as the 109th mayor of New York City from 2014 to 2021. A member of the Democratic Party, he held the office of New York City Public Advocate from 2010 to 2013.

De Blasio was born in Manhattan and raised primarily in Cambridge, Massachusetts. He graduated from New York University and Columbia University before brief stints working as a campaign manager for Charles Rangel and Hillary Clinton. De Blasio started his career as an elected official on the New York City Council, representing the 39th district in Brooklyn from 2002 to 2009. After serving one term as public advocate, he was elected mayor of New York City in 2013 and reelected in 2017.

De Blasio's policy initiatives have included new de-escalation training for police officers, reduced prosecutions for cannabis possession, implementation of police body cameras, and ending the post-9/11 surveillance program of Muslim residents. In his first term as mayor, he implemented a free universal pre-kindergarten program in the city. De Blasio has called attention to what he calls stark economic inequality in New York City, which he described as a "tale of two cities" during his first campaign. He has supported socially liberal and progressive policies in regard to the city's economy, urban planning, public education, police relations, and privatization.

De Blasio ran in the Democratic primaries for the 2020 presidential election. After registering low poll numbers and failing to qualify for the third round of primary debates, he suspended his campaign on September 20, 2019, and endorsed Bernie Sanders five months later.

De Blasio was term-limited and ineligible to seek a third term in the 2021 New York City mayoral election. He was succeeded by Eric Adams on January 1, 2022.