| | Conditions & Treatments | Sleep Disorders How long should a twelve year old sleep for? According to the American Academy of Pediatrics (AAP), children aged 6-12 years need 9-12 hours of sleep per night on a regular basis to promote optimal health. Sleep Disorders - Related Articles Good suggestions to get you fall asleep? 6 year old wakes up with nightmares? Sleepwalking Cures Can sleep apnea be caused by depression? What age can a kid sleep with pillow? What Is CPAP Therapy? What are common sleep disorder symptoms?