Information drawn from a number of different sources was combined through a technique known as aggregate need analysis to measure the unmet financial needs of different groups of postsecondary students. It was found that: (1) after consideration of parental contributions and student self-help, there is an aggregate need for assistance of nearly $113 million, and there is $92 million available, including federal aid and grants or scholarships; (2) because of distribution methods, nearly $34 million in additional need-based student aid would be required to meet all students' need; (3) the need is greatest in the four-year private institutions; (4) families with incomes between $9,000 and $12,000 experience the most unmet need; (5) Iowa residents receive proportionally more aid at public institutions and proportionally less at private institutions. These findings are based on the characteristics of students, institutions, and aid programs during the 1974-75 academic year. Possible changes which might occur in the coming year are forecast as a basis for planning. Estimates were made of the impacts of shifts in the proportion of high school seniors going on to postsecondary education, of changes in institutional costs, and of the impact of inflation on student needs. The problems of Iowa residents attending institutions in another state were not addressed. (Author/LBH)