The aim of this study was to determine the frequency and treatment of enuresis among primary-school children living in Oromieh city, Islamic Republic of Iran. A questionnaire was answered by parents of 3500 selected students at the annual school enrolment in summer 2004. The frequency of nocturnal enuresis was 7.7%. Enuresis frequency was significantly higher among boys (8.6%) than girls (6.7%). Treatment methods used were medication, water restriction, awaking for voiding and enuresis alarm in 57.8%, 18.1%, 11.5% and 2.6% of cases respectively. The frequency of nocturnal enuresis is similar to other studies but treatment methods were different.