<p>No, they can not find out where else you've applied unless you tell them...however, good enough stats could make them think they are a backup...</p>
<p>hmm. I think colleges can see where else you applied if you have filed FAFSA. There's a section indicating all the colleges (of course up to 6) you are applying to. And even when you are applying more than 6 schools, you still have to send SAR or something like that (I think there are 6 ways to send FAFSA to more than 6 schools) which shows all the colleges.</p>