These three reports from the Maricopa County Community College District (MCCCD) offer enrollment summaries for the district and its seven colleges. The first report presents the number and percent of students in eleven age groups and seven ethnic groups by college and district for fall 1979 and districtwide data for fall 1979 and 1972. The report reveals an increase of two years in the mean and median ages; little change in minority group enrollments; and a 10% decrease in recorded White enrollment. The second report provides a more detailed breakdown of district minority enrollment in fall 1979, examining continuation rates and grade point averages (GPA's). Findings in this report include: (1) minority groups provided 13% of the total district enrollment, matching the ethnic composition of the service area; (2) continuation rates for minority group students were somewhat higher than for White students; (3) White and Asian students had the highest GPA's, and Black and Indian students had the lowest GPA's; and (4) part-time students had higher GPA's than full-time students. The third report examines fall 1980 student age distributions for the district and by college. The report indicates that the median student age was 26, with the median age for males generally two years less than for females and the median age of day students five years less than that of evening students. Data tables, methodology, and limitations for each study are included in the three reports. (KL)