The Democrat introduced his bid with a video launched by his marketing campaign early on Thursday.
In saying his candidacy, Mr de Blasio is in search of to assert a job on the nationwide stage that has eluded him as mayor of the largest US metropolis.
The 57-year-old emerged as a progressive standard-bearer in 2013 however has struggled amid middling approval scores to construct a nationwide profile.
Mr de Blasio is serving his second four-year time period as mayor of the nation’s greatest metropolis and will likely be prevented by time period limits from working once more in 2021.
His entry will swell the ranks of Democratic hopefuls to 2 dozen, all aiming to tackle US President Donald Trump, who is anticipated to be the Republican nominee subsequent yr.
Even after six years overseeing a metropolis of greater than eight million folks, Mr de Blasio faces an uphill battle to face out among the many Democratic contenders, who embrace former US Vice President Joe Biden and liberal icons like US Senators Bernie Sanders of Vermont and Elizabeth Warren of Massachusetts.
Throughout his first run for mayor, Mr de Blasio campaigned on decreasing earnings inequality whereas offering extra providers for working-class households, themes which have turn out to be mainstays for nationwide Democratic figures.
His signature coverage accomplishment was establishing common pre-kindergarten within the largest college system within the nation.
Mr de Blasio has teased a presidential run for months, holding fundraisers and travelling to key early voting states like New Hampshire and Iowa to fulfill with activists and voters.
He’ll maintain a number of occasions in Iowa on Friday earlier than travelling to a different early voting state, South Carolina, for the weekend.
Companies contributed to this report.