I applied online and it never specified that I needed one, but at their open house they were mentioned. Talking about Temple University in PA.
Always go to the prime source: http://admissions.temple.edu/apply/first-year-applicant
None specified whatsoever.
In previous years, it seemed that they required one. You can see it on cached versions of the application requirements page from last year.
This year, I think that they don’t require one. If I recall correctly, the admissions at the open house said that it was only recommended.
I also applied and was accepted without one.