Principia College Faculty Salaries Share & Compare. Enter your salary to gain access to our continually growing higher education faculty salary database. College Class: Upper School Class:. Please do not display my information in Principia‚Äôs donor honor roll. If you don’t see the funds or options you want, please. Principia College is the 22nd ranked institution in Illinois. Learn more about the school’s rankings, acceptance rate, tuition, avg. SAT &…