Yes; it's currently legal in 34 US States. Here are the 16 that ban the practice: Delaware, New Jersey, Pennsylvania, Minnesota, Rhode Island, New York, Massachusetts, Vermont, Connecticut, Michigan, Washington, Virginia, New Hampshire, Maine, Oregon, and Missouri.

In Nigeria, nearly 40% of all girls are wed by 18 between 2000 and 2019 (https://childmarriagedata.org/country-profiles/nigeria/#comp...), whereas there were a total of less than 300K American girls in child marriages between 2000 and 2018.