Alameda County Science & Engineering Fair 18 17 Calaveras County Science Fair 2 6 Central California Regional Science, Math, & Engineering Fair 62 57 Chico Science Fair 4 6 Contra Costa County Science & Engineering Fair 1 14 Greater San Diego Science & Engineering Fair 41 97 Humboldt County Science Fair 13 18 Kern County Science Fair 36 43 Lassen County Science Fair 5 6 Los Angeles County Science Fair 34 104 Mendocino County Science Fair 17 14 Monterey County Science Fair 22 22 Placer County STEM Expo 6 6 Sacramento Regional Science & Engineering Fair 9 14 San Benito County Science Fair 1 6 San Francisco Bay Area Science Fair 6 23 San Joaquin County Science Fair 6 7 San Mateo Science, Math, & Technology Fair 43 36 Santa Barbara Science Fair 23 24 Santa Cruz County Science & Engineering Fair 23 40 Synopsys Silicon Valley Science and Technology Championship 23 97 Synopsys Sonoma County Science Fair 9 6 Tulare County Science Fair 6 6