Well there are very few undergraduate rankings, but I have always thought that grad school rankings are a reasonable proxy given that they indicate the community's regard for the school and research activity.
From US News and World Report ranking of top physics schools (private schools excluded)
2. Illinois - Urbana-Champaign
3. UC Santa Barbara
4. Michigan - Anne Arbor
6. UC San Diego = Maryland - College Park = Texas - Austin
9. Wisconsin - Madison
10. UCLA = Colorado - Boulder = Washington
11. Ohio State = Penn State = Stony Brook
Why would you care for an undergraduate ranking in Physics?
Don't you think graduate school matters more than undergraduate in physics? If your research is good enough and GPA, PGRE, more than likely you will get into most competitive schools (my assumption from what I have been reading recently).
But I'd like to hear others who know a few things here, does undergrad. even matter (physics)? (Of course, I and assuming the OP aren't going to any hole in the wall schools that are sketchy and in the top 50)