If you are inquiring about the original members of the band The Monkeys yes all four members are still alive. Only three of the original members are still part of the band, Davy Jones is considered a former member.
All four original Monkees (Davy Jones, Micky Dolenz, Peter Tork and Michael Nesmith) still survive. Also in the 80s there was a series called the New Monkees. To the best of my knowledge, all four of these men still survive also.
Founding member Brian Jones died in 1969. The remaining members (Mick Jagger, Keith Richards, Bill Wyman, Charlie Watts, and Ronnie Wood are all still alive.) Former member Mick Taylor is still alive too.