​Diablo is an unincorporated community established in the early 1900s located 35 miles east of San Francisco nestled at the foot of Mount Diablo; it includes 390 homes, the Diablo Country Club and a US Post Office.

The Diablo Community Services District (DCSD) is a California Independent Special District formed in September 1969 for the purpose of providing security services to the residents of Diablo, maintaining the roads, culverts and bridges within Diablo and maintaining the equestrian/pedestrian path (Kay’s Trail) between Alameda Diablo and Mt Diablo Scenic Blvd.   Click here  for DCSD Formation Document.

​​​​​​Upcoming Events​​​​​​​​
  • 02/20/2020  DCSD Special Meeting, ​
    at 9 am at Diablo CC.  Agenda                                                                                                                        ​
​Tiernan et al vs. DCSD Settlement

Judgment has been entered in the civil action, Robert Tiernan et al. vs. Diablo Community Services District, et al.  The Judgment provides:  (1) the District has no authority to prevent the general public, including bicyclists, vehicles and pedestrians, from using Calle Arroyo in Diablo; (2) Calle Arroyo is a private road owned by the homeowners on that road and the Diablo Country Club and Calle Arroyo is not subject to any general easement of public use and there is no express or implied dedication of easement on Calle Arroyo for public use; (3) the remaining claims in the action were dismissed.  


Click here  for Judgment

Click here  for Plaintiff Amended Complaint


General Contact Information
  • DCSD Address
    ​PO Box 321 Diablo, CA 94528
  • DCSD General Manager ​ and General Correspondence generalmanager@diablocsd.org
  • Emergency 911
  • CCC Sheriff (non-emergency)
    ​(925) 646-2441
  • EBMUD Emergency Line
    (866) 403-2683
  • Diablo Post Office
    ​(925) 837-3800

About Our Community

 Alerts​

​Parking vehicles opposite each other on both sides of the street is prohibited in Diablo because the roads are narrow and  it obstructs passage of emergency vehicles.  Park on one side only.
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DCSD reminds all residents that you must be at least 16 years old and have a valid driver's license to drive a golf cart on Diablo’s roads.


Homeowners are responsible for clearing vegetation that encroaches onto the road and into the creeks that run through your property.  
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In 2015 the California Legislature passed Senate Bill 272 which requires govt agencies to create a catalog of enterprise systems that are used by the agency.  Attached is the District’s catalog.  DCSD SB272

Diablo Community Services District