Weinstein, 67, was convicted in New York City of third-degree rape and first-degree criminal sexual act.
He was cleared of the most serious count of predatory sexual assault but faces up to 25 years in prison.
He still faces charges in Los Angeles of assaulting two women in 2013.
At least 80 women had accused him of sexual misconduct stretching back decades, including actresses Gwyneth Paltrow, Uma Thurman and Salma Hayek.
Weinstein – who denied all charges – was convicted of sexually assaulting former production assistant Mimi Haleyi in 2006 and raping Jessica Mann, a former aspiring actress, in 2013. The judge ordered him sent to jail immediately.