I found an interesting site this morning, which I can longer find at the moment, that outlined the marriage laws for each state. The most intersting was the age requirement. In Kansas, Massachusettes and New Hampshire a male can be married at age 14 and females can be married at 12.(13 in the case of New Hampshire)
I think those ages are a bit young, but I guess not many people take advantage of it at such a young age.
I will continue looking for the link.