This is a comprehensive investigation of suicide differentials among immigrant groups in Canada for the years 1971 & 1981. Support was found for Durkheim’s theory that suicide rates vary inversely with a group’s degree of social integration. Catholics (Italians & Irish) have higher levels of social integration & less suicides than the less community integrated English-Welsh, Scottish, German & American. Data was obtained from StatsCan, census figures, & the official mortality database. 58 Ref.