Children are often affected by seizure types and epilepsy syndromes that are specific to their age group and distinct from those seen in adults. At the same time, certain epilepsy syndromes affecting the adult population, such as Lennox–Gastaut syndrome and juvenile myoclonic epilepsy, often begin during childhood, as do seizures related to genetic abnormalities. The use of electroencephalography (EEG) and prolonged EEG monitoring has allowed for further insight and greater specificity in identifying and understanding seizures and epilepsy syndromes in children. This chapter reviews the role of EEG in pediatric seizures and the pediatric epilepsies, including electrographic findings in the ictal state and in the interictal period, as well as the correlation with clinical seizure semiology as it contributes to the diagnosis of epileptic phenomena. The chapter discusses EEG patterns, seizure types, and epilepsy syndromes specific to neonates, infants, children, and adolescents.