San Mateo County Sheriff's Office is a full service law enforcement agency organized into five divisions: Administrative Services; Support Services; Investigations; Multi-Jurisdictional; and, Corrections.  According to the San Mateo County Sheriff's Office, the duties of the various divisions are “The Administrative Services Division provides overall management, policy-setting, and procedural guidance, as well as civil, fiscal, and administrative support services. It acts as community liaison for the Sheriff’s Office and several law enforcement joint powers agencies to ensure that effective, responsive, and fiscally sound law enforcement services are provided.

The Support Services Division is comprised of over 100 sworn and non-sworn personnel that are assigned to the following bureaus or units: Bureau of Professional Standards, Court Security and Transportation Bureau, Training Unit, Coyote Point Firing Range, Relief Staffing Unit, Civil Enforcement Unit, Technical Services Unit, and the Records Bureau.

The Sheriff’s Office Investigations Division provides thorough and effective investigative and specialized services to the public and San Mateo County criminal justice agencies to ensure safer communities and provide the foundation for investigation and successful prosecution of criminals while promoting countywide and area-wide collaborative partnerships.

Multi-Jurisdictional Services provides specialized investigative and scientific analytical support to criminal justice agencies, the business community, and the general public in order to ensure public safety; provides a strong foundation for investigation and prosecution of alleged criminal activity; and allocates existing law enforcement resources efficiently and effectively through county- and area-wide collaborative partnerships with local, state, and federal partners.

The San Mateo County Sheriff's Office Corrections Division works collaboratively within the judicial system and the community to provide safe and secure adult correctional facilities that protect public safety and promote positive inmate program services in order to reduce recidivism and improve the quality of life of those we serve.”