"Premed" is not usually a major and few colleges have an official premed program; however there are colleges that are said to be strong in "premed" due to their effectiveness at sending their students into medical schools. These colleges tend to have a supportive network for premedical students consisting of comprehensive advising, academic mentoring, and numerous opportunities in extracurriculars and academics (ie. research).
Colleges renowned for such high-quality premedical programs include
University of Pennsylvania,
Washington University in St. Louis,
Duke University,
Rice University,
and Johns Hopkins University.
Several of the Ivy League institutions have very strong programs as well.
Of course, factors that may affect some of an university's medical school matriculation statistics include policies that allow only the stronger premedical students to apply for medical school; difficult introductory science courses that "weed out" a bulk of students; and the fact that the student body at upper-ranked universities generally tend to be of a high caliber and possess qualities that propel them through the difficult premedical track. Interestingly, most of the aforementioned programs have competitive US News Rankings and particularly strong biology departments as well. When choosing a premedical school, consider the school's resources as well as your personal abilities compared with the intensity of the school pool; choose the school where you will most strive as a student.