So, as of May 2019, in the 34 states that have set a marriage age by statute, the lower minimum marriage age when all exceptions are taken into account, are:
2 states have a minimum age of 14: Alaska and North Carolina.
4 states have a minimum age of 15.
20 states have a minimum age of 16.
8 states have a minimum age of 17.
In Massachusetts the general marriage age is 18, but children may be married with judicial consent with no minimum age limit. In the absence of any statutory minimum age, one opinion is that the minimum common law marriageable age of 12 for girls and 14 for boys may still apply. Unlike many other states, in Massachusetts a child's marriage does not automatically emancipate the minor, or increase his or her legal rights beyond allowing the minor to consent to certain medical treatments.-- End of quotation --
https://en.wikipedia.org/wiki/Marriage_age_in_the_United_Sta...
I'm not an American, so I don't understand why you have not fixed this obvious problem.