You would find them in the same way you would find any others. Sometimes you can go to the school's website and find a link there.
If you're looking for scholarships offered institutionally by the schools that you're interested in, start with the school's website or shoot an admission counselor at the school an email. If you're looking to see if the state in which you want to attend school has incentives from students from out-of-state to attend school within their borders, check out that state's department of (higher) education website.
Depends on which state you live in and in which state you wish to attend school...if you're looking at state schools. Private schools have scholarships for all students regardless of state of residence.