O'fallon High School - Class of 1975 Alumni
Join thousands of alumni from O'fallon High School and the Class of 1975. Reconnect with classmates, photos, yearbooks, upcoming reunions.
Varsity Football Schedule 2026-27
08/21 vs Quincy
08/27 vs Francis Howell
09/03 vs Troy‑Buchanan
09/10 vs East St. Louis
09/17 vs Belleville West
09/24 vs Triad
10/01 vs Edwardsville
10/08 vs Belleville East
10/15 vs Alton
08/27 vs Francis Howell
09/03 vs Troy‑Buchanan
09/10 vs East St. Louis
09/17 vs Belleville West
09/24 vs Triad
10/01 vs Edwardsville
10/08 vs Belleville East
10/15 vs Alton
Upcoming Class of 1975 Reunions
Browse past reunion events and photos for your class here.Past Class of 1975 Reunions
Browse past reunion events and photos for your class here.Class Yearbook
View past yearbooks
Connect with Class of 1975 Classmates
Nearby O'fallon Classmates
Class of 1973
13 classmates have joined
Class of 1974
7 classmates have joined
Class of 1976
14 classmates have joined
Class of 1977
10 classmates have joined