Enrollment Data for 1977-1981 full- and part-time students in postsecondary institutions in Ontario, Canada, are presented in response to information needs of institutions and the Ontario Ministry of Colleges and Universities. The introduction, highlights of findings, and statistical tables are presented in both French and English. Analysis is provided by institution, level (undergraduate, graduate, nonpostsecondary), sex, age, legal status, province of residence, and country of citizenship. The following institutions are covered: universities, colleges of applied arts and technology, Ryerson Polytechnical Institute, Ontario College of Art, Ontario agricultural colleges, and registered private vocational schools. Unless otherwise specified, all statistics are based on student head counts; however, when head counts were unavailable, course registration statistics were employed. One objective of this report was to determine possible changing demands due to shifts between full- and part-time enrollments. Data were collected that showed both the patterns in enrollment by institution and the demographic characteristics of students at various program levels within the universities, colleges, and private vocational schools in order to help assess the possible impact of emerging trends on the system. (SW)