How old is Mona Simpson?

Question

If Homer is 36/39, when he was 6 his mother was in her early 30's when she left him. Also Grampa Simpson is 83 years old.

Answer 1

Her actual age is unknown. She was at least 61 at the start of the show though. However, due to the nature of the floating timeline and characters unaging, we don't know for sure.