This paper analyzes the concepts of immigrant assimilation and integration. On the basis of factor analysis it distinguishes between objective integration and subjective integration. Objective integration is defined as actual involvement in the host country's way of life, educational, occupational and economic advancement, and participation in school activities. Subjective integration is defined as feeling at home in the host country, satisfaction, and citizenship aspirations. Data on English, German, Hungarian, and Italian parents of first grade children in Toronto, Canada are reported, and comparisons are made regarding each ethnic group's degree of subjective and objective assimilation. The criteria used to examine all the immigrant groups (with special attention paid to Italians) are educational level, employment, employment of married women, the relationship between schools and parents, child adjustment, involvement in ethnic organizations, and the cohesiveness of extended families. Parent/adolescents that were interviewed. The paper concludes with recommendations regarding immigrant groups and social policy, which stress the need for greater accommodation of ethnic and cultural diversity in society. (Author/APM)