Principia College

, Principia College is a non-profit private higher education institution located in the rural setting of the village of Elsah (population range of under 2,500 inhabitants), Illinois. Officially accredited and/or recognized by the Higher Learning Commission, Principia College is a very small (uniRank enrollment range: 500-999 students) coeducational higher education institution formally affiliated with the Christian-Protestant religion. Principia College offers courses and programs leading to officially recognized higher education degrees such as pre-bachelor degrees (i.e. certificates, diplomas, associate or foundation degrees), bachelor degrees, doctorate degrees in several areas of study. See the unit rank degree levels and areas of study matrix below for further details. This 107 years old higher-education institution has a selective admission policy based on entrance examinations and students' past academic record and grades. The admission rate range is 60-70% making this US higher education organization a somewhat selective institution. International applicants are eligible to apply for enrollment.

Principia College (commonly referred to as Principia or Prin) is a private liberal arts college in Elsah, Illinois, United States. A four-year coeducational institution, the college was founded in 1912 by Mary Kimball Morgan, and its stated purpose is "to serve the Cause of Christian Science." According to the college, it has no affiliation with the Church of Christ, Scientist, but "the practice of Christian Science is the cornerstone of campus life." Students and staff are practising Christian Scientists.

Principia sits on bluffs overlooking the Mississippi River between Alton and Grafton in the Metro East region of Southern Illinois, thirty miles north of St. Louis. A portion of the school's 2,500-acre (1,000 ha) campus is a designated National Historic Landmark District, for its many buildings and design by architect Bernard Maybeck.