Pete Buttigieg has tapped into the New York fundraising scene better than any other 2020 Democratic candidate — and he’ll be back this Labor Day weekend to rake in more big bucks.

The South Bend, Indiana, mayor already brought in $3.7 million from New York state — including $2.9 million just from New York City, according to donor data provided by the Center for Public Integrity and analyzed by The Post.

He bests all other Democratic White House hopefuls in the Big Apple — by a landslide — including New York City Mayor Bill de Blasio, who raised $885,000 in New York with $658,000 coming from NYC; New York Sen. Kirsten Gillibrand, who brought in $2.3 million statewide with $1.6 million from NYC residents before dropping out Wednesday; and former Vice President Joe Biden ($2.5 million/$1.6 million from NYC), who has the powerful endorsement of New York’s well-connected Gov. Andrew Cuomo.

Buttigieg took on Gotham thanks to early strong support from the LGBTQ community, high-profile media appearances, staff with NYC ties and enthusiasm in the acting world.

He’s already had more than 15 events in New York, ranging from a high-dollar fundraiser hosted by Broadway executive Jordan Roth and his husband Richie Jackson April 18 in the West Village to a $25 grassroots event at Brooklyn Bowl on April 15.

“The early core has been the LGBTQ community,” said former Houston Mayor Annise Parker, president of the Victory Fund, a LGBTQ bundling group that endorsed Buttigieg at a Brooklyn event earlier this year. “I think we were a very key constituency in allowing him to get early traction.”

Buttigieg, a military veteran, Rhodes Scholar and openly gay mayor in a red state, will refill his campaign coffers in New York starting Saturday with several events in the Hamptons this weekend, including one hosted by top Broadway producer Jeffrey Sell.

Then on Sept. 4, film producer Bruce Cohen and his husband Gabe Catone will co-host an Upper East Side lunch at the home Emily Glasser and Billy Susman, where tickets start at $1,000 per person, according to an invite obtained by The Post.

On Sept. 5, Basha Frost Rubin, CEO of Priori, a legal hiring platform, and Scott Grinsell, assistant general counsel at Elliott Management Corporation, will host a fundraiser for Buttigieg in NoHo with tickets starting at $1,500.

And on Sept. 24, arts patron and philanthropist Agnes Gund, with co-hosts Donna and Ben Rosen and Peter Wolff, will have an Upper East Side evening fundraiser with tickets at $2,800 a piece, according to invites obtained by The Post.

Alex Levy, a former speechwriter for Sen. Charles Schumer who has co-hosted Buttigieg fundraisers, said there’s a “palpable excitement” among NYC Democratic donors to meet the Midwestern mayor in person.

“Sometimes in politics, when you get close to a candidate, you are less inspired. But the closer people get to seeing and hearing Pete’s message, the more committed they are to his candidacy,” said Levy, who is a member of the Victory Fund board.

Levy has likened the enthusiasm around Buttigieg and his husband, Chasten, to a “gay Camelot” — but with a more solid marriage than the Kennedys. He’s planning a separate NYC fundraiser in late September with Chasten as the headliner.

“He’s charming. He’s witty. He’s an essential part of Pete’s narrative. They’re obviously incredibly close, and he’s great at Twitter,” Levy said.

Buttigieg’s finance team has four New Yorkers, according to his campaign, and his communications advisor is Lis Smith, a veteran of New York politics.

Records show that Mayor Pete has been a hit among self-described actors and actresses in New York, netting about $23,000 of the $88,700 the acting community gave in total to 2020 Democrats. He did the best among directors and producers, getting nearly $65,000 from the $325,000 they donated. New York consultants also gave the most to the mayor — $121,000 out of $606,000 total.

Big-name donors include Sharon Stone, who gave $5,600, and rock star Joan Jett, who donated $150.

Sen. Kamala Harris was the top choice among teachers and professors in New York, with about $202,000 of the $782,000 they donated. And Sen. Cory Booker had the strongest haul among lawyers and attorneys, with $507,000 of the nearly $3 million they ponied up.

Actor Ben Gougeon, who has played supporting roles in Amazon’s “The Marvelous Mrs. Maisel” and NBC’s “The Blacklist,” had never donated to a political candidate until Buttigieg. After seeing a Buttigieg TV appearance on HBO’s “Real Time with Bill Maher,” the Harlem resident thought the young mayor had what it takes to inspire Americans “to do better and to be better.”

“Mayor Pete touched that nerve with me,” said Gougeon, who gave $100 and signed up for $3-a-month reoccurring donations.

He’s also excited for a chance at an openly gay president.

“It’s important to have someone who I know is going to be in our corner,” Gougeon said.

From Jan. 1 to June 30, Buttigieg raised a total of $32.3 million nationwide. At least $3.7 million of that haul come from New York — second only to California.

Statewide, Buttigieg’s $3.7 million is followed by Sen. Bernie Sanders ($3.1 million), Biden ($2.5 million), Harris ($2.4 million), Sen. Elizabeth Warren ($2.4 million), Gillibrand ($2.3 million) and Booker ($2 million).

Chris Meagher, Buttigieg’s national press secretary, says the money is a sign that Buttigieg’s message is breaking through.

“He offers something completely different, and people are excited by what he brings to the table.”