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<p>It depends on if you mean only on the main campus or include branch campuses. If you go by all campuses, SUNY wins because they have so freaking many, followed by California State.</p>
<p>If you go by single campus, Arizona State is the largest (55,552), then Ohio State (55,014), Univ. of Florida (53,537), Univ. of Minnesota (51,659), and then Texas (51,032). The largest private school, NYU, would be tenth on the list of largest U.S. campuses. These do, of course, fluctuate from year to year as well.</p>