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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 Fair Foundation.

The 75th annual California Science and Engineering Fair was held on Saturday and Sunday, April 11-12, 2026, on the campus of California Lutheran University in Thousand Oaks. This year there were 882 participants from 356 schools throughout the State who presented 725 projects in competition for awards totaling over $30,000.


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Latest News from the Fair (2026):

Awards
All Major Fair Awards, Category Awards, and Sponsored Awards have been announced here. See also our Instagram account and sciencefair.space.
Participants
All participating students, and their projects, can be found on our auxiliary student registration site. Click on the menu item “Fair” and then “Showcase.” Use the filter box to select a pre-defined single category or search for terms in project titles.

Important Information About the Fair for:

  

CSEF Reference Library:

Our 2026 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: Thu Apr 16 01:04:23 PM PDT 2026
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