| | Conditions & Treatments | Sleep Disorders How much sleep does a 5-year-old girl need? On average, a 5-year-old girl needs about 10-13 hours of sleep each day. This includes both nighttime sleep and daytime naps. Sleep Disorders - Related Articles Education Courses in Sleep Medicine Can Snoring Occur While Falling Asleep? What Causes Tiredness After Being Up a Short Time? How Blue Light Sleep Sleeping Tricks How do I Exhale With Mirage Swift LT? What time should a 39 year old go to sleep?