Diablo is an unincorporated community established in the early 1900s.  Diablo has approximately 900 residents.

Diablo Community Services District

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.

The Diablo Community Service District (DCSD) is governed by a five-member Board of Directors, who are elected "at-large" every four years.  Elections are held during the November general election.  

Administrative staffing for the DCSD is provided by the District General Manager.  For more information, please visit the DCSD website.

Diablo Municipal Advisory County

The Diablo Municipal Advisory Council (DMAC), was established by the Contra Costa County Board of Supervisors on June 25, 1996 (Resolution 96/314).  The DMAC is comprised of the same five members of the DCSD and serves as an advisory body to the Contra Costa County Board of Supervisors and the County Department of Development and Conservation (DCD).

DMAC meets the second Tuesday of the month at 7:30pm immediately following the regular DCSD meeting, but only when there are applications or permits to be reviewed. 

Both the DCSD and DMAC meeting online: 

Zoom Link: https://zoom.us/j/4680449859; Meeting ID: 468 044 9859

Questions concerning Diablo land use applications, permits or zoning should be emailed to the General Manager at [email protected]