<p>Most colleges show the regional distribution of their enrolled students in the most basic brochure that they show to prospective students. Most may also have a webpage showing the exact count of students from each state, and that information (with some big gaps in the data, sometimes) is gathered by the federal Department of Education and searchable on its website. (But I saw the U of Minnesota missing from the list of colleges with Minnesota students enrolled, and Harvard missing too, which is why I say the federal data appears to have gaps.)</p>