In New Jersey, there is no specific age at which a child who is under the age of 18 can decide which parent to live with.
However, the child's preference may be taken into consideration by the Court if the child is deemed to be of a sufficient age and maturity to make an informed decision.
The Court will also consider a number of other factors when determining custody, such as the child's relationship with each parent, the ability of each parent to provide for the child's needs, the child's health and safety, and any history of domestic violence or substance abuse.
It's important to note that while a child's preference may be considered, it is not necessarily the determining factor in the court's decision.
Ultimately, the court's primary concern is the best interests of the child.