New Jersey Gov. Chris Christie is more unpopular in his home state than any governor it has polled in more than 20 years, Quinnipiac University reported Tuesday.

Its latest poll showed just 19 percent of Jersey voters give Christie a positive job approval rating, with 77 percent pointing thumbs down.

Christie’s fall — accelerated by the George Washington Bridge scandal — is nothing short of breathtaking, according to pollster Maurice Carroll.

“How the mighty have fallen,” Carroll said. “Remember four years ago, when Republican leaders were pleading with … Christie to run for president and he looked like a sure thing for re-election — which he was? Now the neighbors have handed him the most dubious of honors.”

Fairleigh Dickinson University also released a poll on Tuesday showing similar results — with 18 percent of Jersey voters approving of Christie and 73 percent disapproving.

That was the lowest mark for a Garden State governor since Brendan Byrne’s 17 percent rating in 1977 after he signed the state’s income tax into law.

“Gov. Christie has been abandoned by virtually everyone, which is a far cry from where he once sat atop a field of aspiring presidential candidates who cut a more polarizing figure than he did,” said FDU Professor Krista Jenkins, director of the PublicMind poll.

Christie has been dogged by the ongoing Bridgegate scandal, in which his top aides conspired to shut down lanes entering the GW Bridge in Fort Lee in September 2013. The scheme was aimed at punishing Fort Lee Mayor Mark Sokolich for not endorsing Christie.

Even after dropping out of the GOP presidential race earlier this year, Christie still appeared to be in line for a top appointment in President-elect Donald Trump’s administration.

But he has yet to be named to a post in the new administration.

Christie is term-limited and Jersey voters will be voting for a new governor in 11 months.

“This could be a long final year for Gov. Christie,” Carroll said. “If Christie were a student, his marks would be terrible, mostly D and F.”