The Silicon Valley Region extends from Highway 92 in the north to Santa Cruz & Santa Clara counties in the south. It consists of the southern part of San Mateo county, the south-western part of Alameda county, Santa Clara county & Santa Cruz county.
The first map below shows the counties highlighted in red. The second map is a more detailed map of the northern part of the region showing where the San Mateo and Alameda counties split between the SF Bay region and the SV region. If you are uncertain in which region your school or organization resides please enter your zip code in the "region finder"
on the California State website.