Thread:NotShemp/@comment-25528352-20150905142602/@comment-25528352-20150905143550

His age HAS been said on the show - 23. He's had one birthday since he started working at the park, so he is now 24.

In regards to Timmy, he went from a baby to 10 years old, and Mordecai and Rigby stayed the same age - that's just a floating timeline, that's the way things are with cartoons.