Tork was hailed an "amazing soul" by those close to him as his death was announced on his official Facebook page.
In 2012 he was given the all-clear after bering diagnosed with a rare form of tongue cancer three years earlier, telling UKMusicReviews, "They carved it out of me and I have recovered exclusively from all of that".
FOX 13 reported this story from Tampa. Yet, as I write this my tears are awash, and my heart is broken.
Peter Tork of The Monkees performs at the Pantages Theatre on September 16, 2016 in Hollywood, Calif. He left the group soon after the release of "Head".
"I was a hired hand, and I didn't quite know that, and I didn't quite get it", he told The Associated Press in 2000. Do you remember watching The Monkees on TV? The duo tour was rescheduled from an existing 2018 run when the final four dates were hastily cancelled last June due - ironically - when Nesmith took seriously ill.
Tork was the first member to leave the group, departing at the end of 1968 following work on a weird Monkees television special, 33 1/3 Revolutions Per Monkee, although he participated in the band's numerous reunions over the years, most recently for their 50th anniversary tour in 2016.
He later worked as a high school teacher.
Tork, who was often hailed as the band's best musician, had studied music since childhood.
Pardon me if I am being dogmatic - but I think it is harder to put together a band than a TV show - not to take anything away from TV shows.
In a statement, Tork's family said he died Thursday morning of cancer.