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Upper School Reunion 2025
Celebrate and recapture the magic of your Upper School days at Reunion 2025, September 25–27, 2025. If you're part of the 50th Reunion classes (1975 & 1976), plan on arriving September 24.
Whether you’re looking to visit old hangouts, learn about Principia School today and plans for tomorrow, or simply catch up with your best high school friends, Reunion 2025 has a little something for everyone.
Who's Celebrating in '25?
| 10th: 2015, 2016 | 35th: 1990, 1991 | 60th: 1965, 1966 |
| 15th: 2010, 2011 | 40th: 1985, 1986 | 65th: 1960, 1961 |
| 20th: 2005, 2006 | 45th: 1980, 1981 | 70th: 1955, 1956 |
| 25th: 2000, 2001 | 50th: 1975, 1976 | 75th: 1950, 1951 |
| 30th: 1995, 1996 | 55th: 1970, 1971 | 80th: 1945, 1946 |
Volunteer Opportunities
Connect with classmates, spread the word, and encourage your fellow alums to come back to campus. Contact us at reunion@principia.edu or 618.374.5191.