D.C. Code § 19-701
Age of majority: Section 2 of the Act of July 22, 1976, D.C. Law 1-75, provided: "Notwithstanding any rule of common or other law to the contrary in effect on the effective date of this act, the age of majority in the District of Columbia shall be eighteen years of age, except that this act shall not affect any common law or statutory right to child support."