ABSTRACTLifetime morbidity risks and percentiles of the age of onset distribution are given for a series of psychiatric disorders based on data collected as part of a community survey in Edmonton, Canada. The Diagnostic Interview Schedule (DIS) was used to gather information from 3,258 community residents between January 1983 and May 1986. Using a recently developed method of estimating morbidity risks from survey data, the lifetime morbidity risks for depression (male 16.4%, female 22.3%), schizophrenia (male 1.2%, female 1.0%), and other disorders were calculated. These results are consistent with previously published reports.