How old is Jasper The 100?

About the Ages of Characters in The 100

In The 100, the characters ranged from 14 to 18 years old, and considering the 6-year time jump, I estimate that Jasper and Monty were around 15 to 16 at the beginning. Clarke and Bellamy were both 18, just before being floated, while Murphy was likely around 16 to 17 years old.