71st Annual Orange County Science & Engineering Fair
Tentative Fair Schedule
Stay on track with all important dates, deadlines, and events for the 71st Annual Orange County Science & Engineering Fair.
Total Events
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Deadlines, Fairs, and More
Important Dates & Timeline
Mark these critical dates on your calendar to stay on track throughout the science fair process.
Affiliated Fairs Selection
California Science & Engineering Fair (CSEF)
We will select 6th – 12th grade projects for CSEF 2026
Thermo Fisher Junior Innovators Challenge (TFJIC)
We will select 6th – 8th grade projects for TFJIC 2026
International Science & Engineering Fair (ISEF)
We will select top 9th – 12th grade projects to represent OCSEF at ISEF 2026.
Never Miss an Important Date
Add the OCSEF calendar to your personal calendar app to stay informed about all deadlines and events.