The signatures of two dead Brooklyn voters appeared on a Democratic candidate’s nominating petitions — and now she’s at risk of being kicked off the primary ballot, The Post has learned.

State Assembly candidate Marie Mirville-Shahzada and her slate of Democratic district leaders can get axed from the primaries on Coney Island because a mind-boggling 90% of her 5,258 total signatures have been invalidated by the city Board of Elections.

Some 3,000 people who supposedly signed the petitions — which are required to run for office — lived out of the district or were not registered to vote.

A review of signature petitions by The Post confirmed that at least two signatures are of dead voters while a third signature is from a woman whose family said she wasn’t even in the Big Apple on the day she allegedly put her John Hancock on the form.

Despite records showing both voters would be over 100 years old and that they passed away more than a decade ago, fresh ink was signed last month to support Mirville-Shahzada’s bid to get into the party primary.

And 99-year-old Lucia Gelbfish’s family said she didn’t sign the petition either and that her “blood pressure would go through the roof” if she knew her signature had been used fraudulently.

“I was a little incensed only because years ago you didn’t hear things like this. This is our democracy nowadays. It’s very sad,” her daughter, Sharon Gelbfish, told The Post. 

Attempts to reach relatives of the deceased voters were unsuccessful, but Social Security records noted they both passed in 2010.

Mirville-Shahzada now has a meager 479 valid signatures, which is 21 short of the 500 threshold to run for Assembly against fellow Democrat Chris McCreight, the chief of staff to the former left-leaning City Councilman Justin Brannan.

“This is why people lose faith in government, because you have people running for office who are willing to lie and cheat because they can’t compete by following the rules,” McCreight said in a statement.

“It’s dead wrong and should not be tolerated when anybody, of any party, does it.” 

Now, 34 of Mirville-Shahzada’s 479 signatures will also be examined by the Kings County Supreme Court to determine whether there any are forgeries.

Mirville-Shahzada denied that her staff “would have done anything” as they “knocked on every door” and that she would give an “official comment” later but did not respond to any follow-up request for comment.

Sources told The Post she has filed paperwork to challenge in court the BOE’s decision to eliminate the signatures.

“We see signatures get invalidated in races on a regular basis but the fact that 90% of them have been invalidated is just a stunningly high number,” said Grace Rauh, executive director of good government group Citizens Union.

“This certainly strikes me as a case that merits additional investigation and some real scrutiny to see what was going on here. It’s bewildering because it’s so vast,” Rauh told The Post. 

Alex Camarda, senior policy adviser for government watchdog group Reinvent Albany, said a wider investigation should be launched.

“When you look at this collectively with all of these improprieties together, it certainly raises a lot of questions and should be investigated by the Board of Elections,” he told The Post.

A BOE spokesperson said the board does not independently conduct investigations into fraudulent claims but did not comment on whether any potential investigation would be referred to the Brooklyn District Attorney’s Office.

Mirville-Shahzada has been an outspoken supporter of the controversial $3 billion Coney Island casino proposal, which the former councilman voted against.

The district, which stretches from Coney Island to Bay Ridge, is currently repped by Republican Assemblyman Alec Brook-Krasny — who did not face any challenges for the GOP nomination.

Registered Democrats outnumber Republicans by a nearly 2-to-1 ratio and registered independents outnumber the roughly 19,000 registered Republicans with 85,000 registered voters in the district.

The Democratic primary will occur on June 23 and the general election will be held on Nov. 3.