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The California Science & Engineering Fair is the final science fair of the academic year for students throughout the State of California in grades 6 - 12, serving California's future scientists and engineers since 1952. The fair is hosted by the California Science and Engineering Foundation.

The 74th annual California Science and Engineering Fair was held on Saturday and Sunday, April 12-13, 2025, on the campus of California Lutheran University in Thousand Oaks. This year there were 881 participants from 351 schools throughout the State who presented 701 projects in competition for awards totaling $30,000.


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Latest News from the Fair (2025):

CSEF Is Back In-Person!
After four years of virtual fairs, CSEF 2025 was held on the campus of California Lutheran University in Thousand Oaks on Saturday and Sunday, April 12-13, 2025.
Awards
Here are all Major Fair Awards, Category Awards, and Sponsored Awards.
Fair Store Still Open!
The in-person Store is now only a memory, but the online CSEF 2025 Store is still open! Memorialize your achievement in being a participant in the California Science & Engineering Fair with CSEF 2025 branded T-shirts. The store will only be open until May 1, after which all orders will be shipped.

Important Information About the Fair for:

  

CSEF Reference Library:

Our 2025 Benefactors:


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Haven't been to the Fair? Here are some of the photographs from previous years taken by our photographer. For the historically-minded, here's a short photo essay using photographs taken a few decades ago.

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Last updated: Wed Apr 16 12:08:06 PM PDT 2025
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