San Mateo County Fair Google Outlook iCal San Francisco San Mateo-San Francisco San Mateo California 4-H Topics Youth Development The San Mateo County Fair is a summer event in the Bay Area that features food, entertainment, and exhibits. The fair celebrates the county's culture and diversity. San Mateo Events Center In-Person Event? No Certifications Available? No Event Date Fri, May 30 2025, 8am - Sun, Jun 8 2025, 5pm Google Outlook iCal Venue Address United States