The feds found dozens of diamonds, piles of cash and a fake passport with Jeffrey Epstein’s photo stashed in a safe at the convicted pedophile’s Upper East Side townhouse, they said Monday.

Prosecutors told a Manhattan federal judge about the newly revealed contents of the safe — which also held a trove of lewd photos of young women — as they argued against giving Epstein bail at least partly because of his immense financial means.

Assistant US Attorney Alex Rossmiller noted that the accused sex trafficker’s financial disclosure form for bail failed to mention the “piles of cash, dozens of diamonds” in his now-notorious home safe.

“The defendant’s financial disclosure should alarm the court,” Rossmiller said.

In addition to lots more dough and valuable items including art that hadn’t been accounted for, prosecutors said, investigators discovered an expired phony passport in Epstein’s mansion that was supposedly issued in the 1980s. It had his photo on it, although the name wasn’t Epstein’s, and it listed as his residence an address in Saudi Arabia.

Rossmiller also noted that Epstein has more than $100 million alone in a single account — among at least $500 million in holdings. The suspect has already used hundreds of thousands of dollars to try to bribe potential witnesses to keep their mouths shut about his crimes, prosecutors have said.

Manhattan federal Judge Richard Berman agreed Monday that Epstein’s one-page financial affidavit was “cursory” as he delayed a decision on whether to grant the suspect bail until Thursday.