Privacy Policy

This is the official website for The Principia, a private school with programs from infant/toddler/parent education through the 12th grade and a college with both undergraduate and lifelong learning programs. Principia is located on two campuses 50 miles apart—the School is in the St. Louis, Missouri, area, and the College is in Elsah, Illinois.

Anyone at Principia can be contacted by sending a message through the "Contact Us" link at the bottom of this page.

For each visitor to this site, our web server automatically recognizes and collects only the person's domain name, browser type, and other non-personal information—not an email address. We collect only aggregate information on pages accessed by visitors. This information is used only for internal review to improve the content of our site.

The email addresses of those who communicate with us, as well as any other volunteered information, if kept, is used solely by Principia to stay in touch with prospective students, parents, alumni, etc. No information, including email addresses, is ever shared with or provided to any parties outside of Principia.

When requested, Principia will remove individuals from all mailings and other contact and will keep contact information confidential.

By providing your phone number, you agree to receive text messages from Principia. Message and data rates may apply. Message frequency varies.

Any areas of our site utilizing "cookies" use that technology to help store information about visits to our site. A cookie is a small amount of data that is sent to your browser from a web server and is stored on your computer's hard drive. Cookies can help estimate our audience size, measure traffic patterns, and track visitor patterns in the aggregate. Having this information helps us provide a better site for our audience. Cookies, web beacons, and other technologies may be set by third parties. For information about how you can opt out, you may visit and

Here are the campus addresses:

Principia College
1 Maybeck Place
Elsah, IL 62028-9799
Telephone: 618.374.2131

Principia School
13201 Clayton Road
St. Louis, MO 63131-1099
Telephone: 314.434.2100