A parent in New York state is expected to support a child until the child reaches the age of 21, according to NYCourts.gov. This is true as long as the child is still living at home.
There are certain circumstances under which a child or the child's custodial parent stops receiving parental support or child support before the age of 21 in New York state. This occurs if the child is considered emancipated because they no longer live in their parent's home and are self-sufficient, marry before age 21 or enter the military. Parents may still be required to pay for child support if a child moves out of the parent's home before age 21 if the child is attending college.