Former Mayor Bill de Blasio settled a historic tab with New York City for misusing his NYPD security detail during his embarrassingly short-lived presidential bid.

De Blasio will have to shell out nearly $330,000 to repay taxpayers after he repeatedly tapped cops for “political purposes” — including covering the cost for his detail to attend a Red Sox game in Los Angeles during a campaign trip, which The Post exclusively revealed.

The settlement struck Wednesday with the Conflict of Interest Board also wrangled an apology from de Blasio, who has stubbornly insisted for years he was in danger – and thus needed taxpayer-funded security – during his 2019 vanity run for president.

“I made a mistake and I deeply regret it,” he said in the settlement.

The board had slapped the former mayor with a $155,000 fine in 2023 following an extensive city Department of Investigation probe that excoriated de Blasio for using NYPD security against ethics guidance and for his “personal benefit.”

The settlement ultimately reduced de Blasio’s fine to just $10,000, after he ponies up a $100,000 up front payment.

He then has to continue to make payments of $14,000 every three months.

But if he defaults, the ex-mayor would be on the hook for the full $475,000 tab.

“This settlement brings to a successful conclusion the first ever enforcement action brought by the Board against a Mayor of the City of New York,” COIB wrote in a release.

The deal provides a capstone to de Blasio’s debacle of a presidential run.

Over four months, de Blasio never gained more than 1% in polls in the 2020 Democratic Party primary, gave stump speeches to 15-person crowds and drew widespread disdain from New Yorkers who believed he should concentrate on the city’s problems.

De Blasio may have failed to garner support in the polls, but he did prove more than capable at squandering tax dollars on the campaign trail.

Taxpayers paid $490 for seven NYPD cops to tag along with de Blasio as he watched his beloved Boston Red Sox play in Los Angeles.

They also covered de Blasio’s $45 entrance fee to Red Rock Canyon National Conservation Area in Nevada, where he went for a midday hike during a break in campaigning. 

The security detail took more than 40 trips in which hotel costs exceeded the federal limit followed by the NYPD – such as a $399-per-night stay in Chicago that came with a $64 valet fee.

De Blasio acknowledged in the settlement that the Conflicts of Interest Board told him he’d violate the law if he asked the city to pay for his security expenses while campaigning.

He then copped to ignoring the guidance and not repaying nearly $320,000 in NYPD security expenses as he and his wife Chirlane McCray took 31 trips outside the city for the failed campaign.

“I acknowledge that I made a mistake, and I deeply regret it. Now it’s time to move forward,” Blaz wrote on social media in response.