text: do you feel a 21 year old is old enough to get married? my sister is 21 with no children and her boyfriend is 23 with 2 children..  they want to get married but i feel she's to young...  she and him have only been together 8 months...  i feel they should wait, what do you feel? 21? not just no, but hell no. in my opinion i don't think anyone under 25 should marry and i certainly don't think anyone under 27-28 should have kids.  just take a poll in any middle school and count the kids from broken homes vs the kids living with their original parents and my point is made.