Snoring is a common manifestation of obstructive sleep apnea and represents one end of the spectrum of sleep-related breathing disorders. Children with primary snoring initially may develop OSAS later, so inquiring about symptoms of OSAS should be part of each visit. Obstructive sleep apnea can result in serious cardiovascular and metabolic consequences and neurocognitive deficits. Adenotonsillar hypertrophy remains the most common cause of OSA although the rising prevalence of obesity is of increasing importance. Polysomnography remains the gold standard in the diagnoses of OSAS and in assessing the risks associated with surgery. Most children with OSAS can be treated with adenotonsillectomy in the ambulatory surgery center. However, there are children at risk for severe OSAS and for postoperative complications, who will need PICU care. In addition to adenotonsillectomy, OSAS can be treated successfully in referral centers with other surgical approaches and by the use of positive airway pressure. Children with obesity-related OSAS often require CPAP or BPAP for control of OSAS.