7600 to schedule an appointment. Learn how to apply for a US passport for children under 16.Minors age 16 and over, and persons over age 18, holding a five-year validity passport, may use the following guidance to prepare for the passport application. Passports for 16 and 17 year olds have special requirements that must be met before a new passport can be issued. Check forms and fees here. One Application DS-11 (fill out online)- his form must be filled out online. All hand-written applications will be suspended. Anytime after 16 years old, you can get an adult passport. If you wait until 18, then parents do not need to be present to apply.