@lednabm @tc_morekindness @JaneETowle @shoq You might be surprised in which states that's allowed. Hint: 2/3 of the west coast.
In deep red states like Texas and Louisiana, the minimum is 16, but even that requires a lot of hoops to be jumped through (like emancipation and judicial approval).
To the best of my knowledge, in no state in the US can you get married under the age of 15 without special dispensation from the judicial system.