How old are the characters in adventure time?

Answer 1

Finn is 13

Jake is 20

PB is 18

Marceline is 2,579 ( probably the oldest one.. & the cutest next to Beemo)

Ice King is 24

Lady Rainicorn is 19

LSP is 12

Beemo is 8

Gunter is 3

Flame Princess is 13

Peppermint Buttler is 21

Fiona is 13 (probably because she is the girl version of Finn)

Cake is 20

MeMow is 17

Tree Trunks is 45

Candy People is ?? i dont know yet

Cinnamon Bubble is 28 ( cinnamon bun)

Starchy is 13

HotDog Princess 18

Raggedy Princess is 18

Penny ?? i dont know

Answer 2

As the title says, they are considered 'teens' or, adolescents. I estimate that they aren't any younger than fifteen at the least, and they don't appear to be much older than seventeen, either.

Answer 3

They started the season being 15 and end the season being 18 or some older.