Does anybody know what percentage of new undergraduate students are just coming out of high school?

Answer 1

This definitely depends on the school. At an elite school like, say, Harvard or Duke or Stanford, virtually the whole freshman class will be no more than one year away from high school. But in a college in the city where there are a lot of evening courses, you might find a lot of returning older students. i suppose it could be as much as 50 % or so in a few cases.

Answer 2

It depends on the school. I'd say roughly 60% at a regular school but a community college usually has more non-traditional students than average students.