District of Columbia (Washington, DC)
Summary: Adults may be adopted.
Most Relevant DC Statutes:
§ 16-303
§ 16-304
16-303. Persons Adopted.
A person, whether a minor or an adult, may be adopted.
16-304. Consent
(f) A person over eighteen years of age may be adopted, on the petition of the adopting parent or parents and with the consent of the prospective adoptee, if the court is satisfied that the adoption should be granted.