Assemblymember Zohran Mamdani is on track to secure the Democratic nomination for mayor, after former Gov. Andrew Cuomo conceded to him Tuesday night following the first round of ranked-choice primary votes.

The early upset in the mayoral race was remarkable.

The 33-year-old Democratic socialist rallied new and young voters to his cause and launched a ground game that outmatched the field. Mamdani took the lead against the 67-year-old former governor, who resigned in disgrace after multiple accusations of sexual harassment yet enjoyed outsize name recognition and more than triple the money spent on his behalf.

With 95% of precincts reporting two hours after polls closed at 9 p.m., 44% ranked Mamdani as their first choice while 36% chose Cuomo first and 11% had city Comptroller Brad Lander.

Mamdani emerged to raucus applause at his election party on a brewery rooftop in Long Island City, about 20 minutes after midnight.

“Today, eight months after launching this campaign with the vision of a city that every New Yorker could afford, we have won,” he said. “I will be the mayor for every New Yorker, whether you voted for me, for Gov. Cuomo or felt too disillusioned by a long, broken political system to vote at all. I will fight for a city that works for you, that is affordable for you, that is safe for you.”

“Together, we are sending Andrew Cuomo back to the suburbs,” Lander cheered at his election night party.

Cuomo has already petitioned to be on the general election ballot in November, running on an independent line, as has incumbent mayor Eric Adams.

Inside the sprawling, bright-white Carpenters Union headquarters on the west side of Manhattan, Cuomo appeared on stage without notice.

“I want to applaud the Assemblyman for a really smart and good and impactful campaign. Tonight was his night. He deserved it. He won,” Cuomo said, flanked by his three daughters and his son-in-law.

He added that he’d already called Mamdani to congratulate him.

Official, full results from all the rounds won’t be available until mid-July.

Mamdani began primary day with a 5:40 a.m. press conference in Astoria Park, before meeting with voters in Jackson Heights.

“We are approaching the dawn of a new era in New York City,” Mamdani said. “We are turning the page on the corrupt politics of the past that made this the most expensive city in the United States of America.”

As the results trickled in in the evening, his key supporters gathered at a brewery in Long Island City while a majority of his canvassers were spread out elsewhere, at watch parties hosted by other organizations.

The mood was celebratory and supporters reveled in the news.

“I am in a little bit of a state of disbelief,” said Gabbi Zutrau, who worked on social media strategy for the campaign.

“It is such a historic moment for us as Muslims, as South Asians, as immigrants, as New Yorkers,” said Saman Waquad, president of the Muslim Democratic Club of New York. “The way Zohran has brought people together in this campaign has been so incredibly beautiful.”

Janos Marton, a one-time candidate for Manhattan district attorney who canvassed for Mamdani, said, “It was clear that he was bringing new people in — South Asians, Muslims, young people —  and that was true on Staten Island, where I live, and I guess it was across the city too.”

Other candidates significantly lagged in the first-round results. Former Comptroller Scott Stringer conceded shortly after polls closed, while City Council Speaker Adrienne Adams received about 4% of the vote.

Zellnor Myrie, Michael Blake, Whitney Tilson, Jessica Ramos, Paperboy Prince and Selma Bartholomew each received less than 1% of the vote.

In other citywide races, incumbent Public Advocate Jumaane Williams defended his seat against Assemblymember Jenifer Rajkumar. In the race for city comptroller, Manhattan Borough President Mark Levine maintained a significant lead over Brooklyn Councilmember Justin Brannan, who conceded the race late Tuesday evening.

Tuesday night’s results only included votes made in person at polling sites, plus any early mail or absentee ballots that the election board received and scanned by Jun. 20. The BOE processes affidavit ballots after polls close.

The official winners of the primary won’t be known until at least July 1, when the Board of Elections will release a preliminary tabulation of ranked choice ballots — which will run through every ranked-choice decision on the more than 900,000 ballots cast in the Democratic and Republican primaries. Official certified results will follow.

One reason for the built-in delay: the board returns absentee ballots with minor errors to voters so that they can fix any issues such as unsigned envelopes. Voters must send those absentee ballots back by July 14 in order for them to be included in the official count.

Remarkable Rebuke

Mamdani’s victory over the former governor was striking.

Cuomo emerged as an early frontrunner despite his Rose Garden campaign strategy and not having lived in New York City in decades. His campaign paid canvassers to fan across the city, while an independent expenditure group, Fix the City, amassed more than $25 million to unleash a barrage of attacks on Mamdani.

Cuomo consistently cast himself as an experienced leader best poised to fight against the Trump administration and correct what he described as a city in crisis.