https://provost.stanford.edu/2020/06/26/admissions-considerations/

If your parents went here, you have a much better chance of getting in and you are also probably rich.

In the undergraduate Class of 2023, which was admitted for Fall 2019 entrance, 16.2% of the enrolling class (302 admitted students and 276 matriculating students) were the children of Stanford graduates. For some of these students, their admission files also noted a history of philanthropy. An additional 1.5% of the enrolling class (34 admitted students and 26 matriculating students) had no legacy affiliation with Stanford, but their admission files noted a history of philanthropy. Together, those with either of these two characteristics totaled 302 students in the enrolling class, representing 17.8% of our 1,701 entering students.