Trooper Davis, Harris County The age is 18 without from a parent or your legal guardian. If under the age of 16, the law requires that the couple receives a court order before being allowed to marry. Yes, it is legal to get married at age 15 in Texas with parental consent. Without consent you would need a court order, and those are hard to obtain. From Texas Family Code:  2.003. APPLICATION FOR LICENSE BY MINOR.