Law Enforcement Agencies in San Buenaventura, CA CA › Ventura County Agencies serving the city of San Buenaventura in CA. Agency Types in San Buenaventura Campus Police 1 agencies Coroners 1 agencies County Jails 1 agencies Municipal Police 1 agencies Parole Probation 1 agencies Probation Pretrial 1 agencies Sheriff 1 agencies All Agencies in San Buenaventura, CA US Probation & Pretrial Services Office Ventura County Ventura College Ventura County Ventura County Detention Services Div Ventura County Ventura County Medical Examiner Office Ventura County Ventura County Probation Agency Ventura County Ventura County Sheriffs Department Ventura County Ventura Police Department Ventura County