Ollie Simmons-Watt, five, died in the collision in Limavady, Co Derry, yesterday around 3.40 pm.
He was rushed to the hospital after being treated at the scene by emergency personnel, but he died as a result of his injuries.
The PSNI is asking anyone with information about the incident to contact them.
“It was reported shortly after 3.40 pm that a van had struck a child in the Irwin Avenue area,” said Sergeant Amanda McIvor.
“We believe at this time that Ollie was on his bike in the area at the time of the collision.
“Officers attended alongside colleagues from the Northern Ireland Ambulance Service and Air Ambulance NI, and the boy was taken to hospital for treatment, but unfortunately died from his injuries
“The road, which was closed for a time following the collision, has since re-opened.
“Our enquiries are continuing, and we are appealing to anyone who may have witnessed the incident, or captured any dash cam or other footage, to get in touch via 101, and quote reference number 1235 of 29/09/22.”