Mounties received a call Thursday afternoon about the lost boy and police and neighbours immediately began searching a wooded area around Taylor Creek.
The boy was found minutes later and pulled from the creek but was unresponsive.
He was airlifted to BC Children's Hospital in Vancouver, but efforts to revive him were unsuccessful.
Police say the creek was very swollen and running fast from recent heavy rainfall.
North Vancouver police say they'll continue looking into the death, and the BC Coroners' Service is expected to take over the investigation.