How hard is it to get into the University of Wisconsin vs USC?

The biggest practical difference is that USC is a highly selective private university with a much tougher overall admissions bar, while the University of Wisconsin–Madison is more accessible for a broader range of strong applicants, especially if the rest of the application aligns well with the school. USC gets a very large national and international applicant pool and is known for turning away many students with excellent grades and scores. Wisconsin is still selective and very popular, but it is not usually viewed in the same tier of admissions difficulty as USC.

In general terms, USC should be treated as a reach for almost everyone, including applicants with very strong academics. It places a lot of weight on academic performance, course rigor, writing, activities, and institutional priorities, so even well-qualified students are far from guaranteed admission.

Wisconsin–Madison is better thought of as selective but more attainable. Strong grades in challenging classes matter a lot there too, but the admissions process is typically less brutally competitive than USC’s. One important detail is residency: Wisconsin can be more accessible for in-state applicants than for out-of-state students, while USC does not have that public university in-state dynamic.

For building a college list, the cleanest way to think about it is that USC belongs in the harder category by a noticeable margin. Wisconsin can be a target or reach depending on your academic profile and residency, but USC is much more likely to stay in the reach column. So if you are asking purely which one is harder to get into, the answer is USC, clearly.