Law enforcement officers throughout the county made the arrests on local roadways during an anti-DUI crackdown from Dec. 16 through Christmas Eve, according to a CHP news release.
DUI arrests during the same nine-day period last year were only slightly higher, when police netted 286 drunk driving arrests.
Police in Santa Clara County said there were no deaths as a result of DUIs on Saturday night, but that they saw two DUI-related crashes that caused minor injuries.
Drivers throughout the county can expect to see beefed-up DUI patrols and checkpoints through New Years Eve as part of the ongoing anti-drunk-driving campaign.
Police are asking the public to report drunk drivers this holiday season by calling 9-11.