When is a child too old to get child support?

In the USA, there is no age limit for a child to collect back child support owed ( arrears ). The point at which it is legally stopped is at the age of emancipation ( 18 ), in most States. However, if an order was filed and there is money owed before this time, the Department of Child Support Services will continue to collect until it is paid in full or settled with the parties ( mother or state ).