Athletics
Niles East competed as a member of the Central Suburban League from 1972 until its closing in 1980. It was always a member of the Illinois High School Association (IHSA), which governs most athletic competition in Illinois. The IHSA currently recognizes Niles West High School as the caretaker of Niles East's competitive history.
The following teams finished in the top four of their respective IHSA state championship tournament:
- Baseball: 2nd place (1957–58)
- Gymnastics (boys): 4th place (1961–62, 67–68, 74–75); 3rd place (1968–69); 2nd place (1962–63, 63–64)
- Swimming & Diving (boys): 4th place (1952–53)
- Tennis (boys): 3rd place (1960–61)
- Wrestling: 2nd place (1960–61)
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