They’re Berned out.

Hillary Clinton is only 142 delegates short of clinching her party’s nomination, but a large faction of Bernie Sanders supporters who swear never to support the Democratic frontrunner could threaten her general-election chances.

Fired up by trending social-media hashtags like #AlwaysBernie and #DropOutHillary, Sanders voters have not warmed to Clinton despite her commanding lead. An online pledge drive at WontVoteHillary.com has amassed more than 63,000 signatures, and in an exit poll taken during Tuesday’s West Virginia primary, 75 percent of Sanders supporters said they would not back Clinton if she was the Democratic candidate in November.

“Asking me to vote for Hillary is like asking a Christian to vote for Satan instead of Jesus,” Liberalheart posted on Twitter.

“[Clinton] sold her soul to filthy lucre long ago,” tweeted ArtistsforBernie under the #DropOutHillary hashtag.

“‏Nothing could get me to vote for Hillary Clinton, nothing,” tweeted Jay Thompson.

“I am going to vote for Bernie whether I have to write in him or not,” Frank Duffy, 41, of Staten Island, told The Post.

“I would happily vote for a third party, including the Libertarian,” said Carter Craft of Hoboken, 46, a newly minted Democrat who changed his registration so he could cast a Sanders ballot in New Jersey’s June 7 primary.

“I’m still holding out hope” that Sanders can pull an upset in the nomination battle, said Tracy Williams, 39, of Poughkeepsie. “But once it’s decided, there’s going to be a huge problem in my and a lot of people’s minds.

“It’s her arrogance,” she continued. “She’s a part of that establishment, that 1 percent, and that makes it difficult to vote for her.”

Williams said she “would have to hold my nose” to vote for Clinton in November, and would do so only if a Donald Trump victory in New York seemed imminent. Otherwise, she’s considering a third-party vote.

“If we look at past trends, many Hillary Clinton voters said the same thing in 2008 about supporting Barack Obama,” said Dr. Christina Greer, a Fordham University political scientist. “But Bernie Sanders voters now are not the same as Clinton’s voters were then.”

“I kind of feel bad for Hillary,” said Gena Mimozo, 33, of Staten Island. “She paid the price to play the game that all the corrupt politicians have been playing, and now it’s coming back to bite her.”

“By staying in the race Hillary is dividing the party,” Errol Brown posted on Twitter. “She needs to do the right thing & #DropOutHillary.

“She would rather put the profits of major corporations ahead of the future of our planet,” Duffy said.

“Clinton may be socially liberal but she’s very financially conservative,” Craft agreed.

Clinton’s appeals to gender infuriate Williams. “Anybody that plays the woman card is completely insane,” she said. “At work, being a woman does not mean you’ll do a better job, and I don’t feel that just because she’s a woman she should be president.”

To keep his fans in the party’s fold, Greer said, Sanders will have to do for Clinton what she did for Obama in 2008: hit the campaign trail and make the case for his former primary opponent.

“However, Sanders has already said it’s up to Clinton to come over to his supporters,” Greer said.

“I just want the party to embody my values,” said Staten Islander Gena Mimozo, 33, who plans to vote for whoever Sanders endorses come November. “Democratic Socialism is something I did not even know about before Bernie Sanders. And now the Democratic Party has to give me a reason to stay.”