A worker at the mental hospital for the criminally insane on Wards Island has died of the coronavirus, The Post has learned.

The staffer at Kirby Forensic Psychiatric Center died within the past week, according to the Public Employees Federation.

Among patients sent to Kirby, which treats criminal defendants who’ve been judged not responsible for their misdeeds due to mental ­illness, is Daniel Rakowitz, the “Butcher of Tompkins Square Park,” who was acquitted of murdering, dismembering and boiling the body parts of Monica Beerle in 1989.