A medical examiner has yet to determine a cause of death, but police said there was no sign of foul play.
The band formed in Boston in 1976 and two years later would release their self-titled album which shot them to fame with hits including 'My Best Friend's Girl'.
The band alone had 13 top 40 hit singles, which would then jumpstart Ocasek's very successful career in producing.
After The Cars broke up in 1988, he went on to produce numerous albums for bands including Bad Brains, Weezer, Guided by Voices, Bad Religion and Nada Surf. Porizkova had appeared in the band's acclaimed "Drive" video. The band was inducted a year ago into the Rock and Roll Hall of Fame.
"It's quite unusual to be here without him", Ocasek said. Bass player and vocalist Benjamin Orr, who grew up in Lakewood and Parma, died in October 2000 of pancreatic cancer.
Ocasek was married three times and had six sons, two from each relationship.
In 2018, model Paulina Porizkova, whom Ocasek Wednesday in 1989, revealed that the couple had been "peacefully separated for the past year".
He grew up in Baltimore, and his family moved to Cleveland when he was a teenager.