Are adult children entitled to support? The answer may surprise you. In many states, including Maryland, there are situations where a parent may have to pay support for a child 18 years or older. For example, if a child is under 19 and still in high school, child support will continue either until the child graduates or until the child turns 19. However, an adult destitute child may still be entitled to support. This most commonly occurs when the child has a mental or physical disability when prevents the child from being fully self-supporting. Additionally, some states have laws requiring adult children to pay for nursing home care for their parents, giving new meaning to the term "the ties that bind."