Alameda County Science & Engineering Fair 16 17 Calaveras County Science Fair 2 6 Central California Regional Science, Math, & Engineering Fair 51 57 Chico Science Fair 4 6 Contra Costa County Science & Engineering Fair 1 14 Greater San Diego Science & Engineering Fair 35 97 Humboldt County Science Fair 10 18 Kern County Science Fair 29 43 Lassen County Science Fair 4 6 Los Angeles County Science Fair 31 104 Mendocino County Science Fair 14 14 Monterey County Science Fair 20 22 Placer County STEM Expo 6 6 Sacramento Regional Science & Engineering Fair 8 14 San Benito County Science Fair 1 6 San Francisco Bay Area Science Fair 5 23 San Joaquin County Science Fair 5 7 San Mateo Science, Math, & Technology Fair 36 36 Santa Barbara Science Fair 23 24 Santa Cruz County Science & Engineering Fair 19 40 Synopsys Silicon Valley Science and Technology Championship 21 97 Synopsys Sonoma County Science Fair 9 6 Tulare County Science Fair 5 6