Only one-third of Americans believe Jeffrey Epstein committed suicide behind bars, according to a new poll by Emerson College.

Voters were asked to weigh in on the convicted pedophile’s Aug. 10 death at Manhattan’s Metropolitan Correctional Center — and they were split in even thirds.

Thirty-four percent believe Epstein was murdered, 33 percent believe the city medical examiner’s ruling that he hanged himself and 32 percent are unsure.

Across political affiliations, 46 percent of Republicans believe the financier was murdered versus 26 percent who say it was suicide. Thirty-eight percent of Democrats, meanwhile, say it was suicide, compared to 26 percent who think he was killed.

Epstein, 66, used a bed sheet tied to the top of a bunk bed in his cell to commit suicide a day after thousands of pages of court documents were unsealed detailing his years of alleged abuse. He was facing prison time on federal sex-trafficking charges.

He was not on suicide watch at the time. The feds are investigating his death.