A 2021 study found that nearly 300,000 children age 17 and under were married in the United States from 2000 to 2018. An overwhelming majority were 16- or 17- year-old girls, on average marrying a man four years older. But
more than 1,000 were 14 or younger, and five were only 10 years old.
According to World Population Review, In most U.S. states, the minimum marriage age for minors that have parental consent ranges from 12 to
17 years old. California and Mississippi do not set minimum ages for minors
to marry with parental consent. Massachusetts has the lowest minimum marriage ages with parental consent of 12 for girls and 14 for boys.