The collision, involving a black Toyota Avensis car and a 9 year old male pedestrian, occurred just before 5 pm on on the Glenravel Road in Ballymena on Saturday, September 9.
The boy was taken to hospital following the collision and remains in intensive care at this time.
The driver of the car has been spoken to by police.
The road was closed for a number of hours but has since re-opened.
Anyone who witnessed the collision is asked to contact officers at Ballymena station on 101 quoting reference number 957 09/09/17.