The state that has the youngest average marriage age is the state of Utah.
Utah is the state that has the youngest average marriage age, with a median marriage age of 26.8 months for men and 25.2 month for women.
Other states with the youngest average marriage ages are South Dakota, Arkansas, Wyoming and Idaho.
Idaho has an average marriage age of 27 years old for men and 25 years and 4 months for women.
Wyoming has an average marriage age of 27 years old for men and 25 years and 3 months for women.
Arkansas has an average marriage age of 27 years and 1 month for men and 25 years and 3 months for women.
And South Dakota has an average marriage age of 27 years and 1 month for men and 25 years and 3 months for women.
In most of Northwestern Europe, marriages at very early ages were rare.
One thousand marriage certificates from 1619 to 1660 in the Archdiocese of Canterbury show that only one bride was 13 years old, four were 15, twelve were 16, and seventeen were 17 years old; while the other 966 brides were at least 19 years old.
The most common exception allows marriage of minors as young as 15 years old with parental consent.
CA, MS, NM, and OK allow for marriage between children under the marriage age, with parental consent but without setting a minimum age.