MAILING ADDRESS San Mateo County Sheriff's Office 400 County Center Redwood City, CA 94063 Telephone Directory Driving Directions Employment  Equal Employment Opportunity Plan (EEOP) Organizational Chart IMPORTANT SAFETY INFORMATION Child Safety Seat Inspections Identity Theft SHOULDER PATCH REQUESTS As a result of potential security issues, the San Mateo County Sheriff's Office no longer fulfills patch requests. This is to ensure the safety of our citizens as well as to prevent the unlawful use of law enforcement patches and insignia.