The objective of this study was to prospectively document the incidence of meatal stenosis in boys. The study included a consecutive sample of boys whose visit with the physician included a genital examination in a private primary care pediatric practice in rural northern Wisconsin. Meatal stenosis was diagnosed in boys from 1.94 to 12.34 years of age. The diagnosis was made in 24 of 329 circumcised boys who were Tanner I development and older than 3 years of age (7.29%, 95%CI=4.48-10.10%). Nearly all required meatotomy to resolve their symptoms. All of the boys with meatal stenosis were circumcised neonatally (exact OR=3.54, 95%CI=0.62-infinity). The ratio of circumcised boys to noncircumcised boys in this study provided 80% power to demonstrate a 21.4% difference in the incidence of meatal stenosis between circumcised and noncircumcised Tanner I boys 3 years and older. Meatal stenosis may be the most common complication following neonatal circumcision. The frequency of this complication and the need for surgical correction need to be disclosed as part of the informed consent for neonatal circumcision. A careful meatal examination is indicted in any circumcised boy with abdominal or urinary complaints.