Who's District are you in? New web application allows you to put in an address and find your County Supervisor!

Redistricting is the redrawing or adjusting of electoral district boundaries following the federal Census to account for population shifts and growth during the previous decade. The redistricting process is governed by the U.S. Constitution, State and federal law.

California Elections Code § 21500 requires the County Board of Supervisors to adjust the Supervisorial district boundaries every ten years following the federal Census so that the districts are as "nearly equal in population as may be" and comply with the Voting Rights Act. This year, the Board of Supervisors is required to redistrict the five Supervisorial districts using 2010 Census data. The County’s redistricting process will include broad opportunity for public review and input.

Contra Costa County is committed to an open and transparent redistricting process by hosting community workshops throughout the County, providing all maps and data on-line, and potentially the ability to create redistricting options on-line.

The 2010 Census revealed that Contra Costa County has 1,049,025 residents. Extracts of the data for California, counties, places (incorporated cities and Census Designated Placed or CDP) and census tracts are available on the Demographic Research Unit website.

American FactFinder will also provide on-line access to more Census 2010 results.

August 9, 2011: Board of Supervisors Redistricting Public Hearing and Ordinance Adoption
On Tuesday, August 9, 2001 the Board of Supervisors approved the Ordinance establishing the approved map. The ordinance takes effect 30 days after passage (Sept 9th, 2001).  


August 9, 2011: Board of Supervisors Redistricting Public Hearing and Ordinance Adoption
On Tuesday, August 9, 2011 at 10:00 am the Board of Supervisors will conduct a public hearing to consider adoption of an ordinance establishing the approved map as the new supervisorial district boundaries.

Board Order
Draft Ordinance No. 2011-15
Supervisorial District Map
Supervisorial District I Map
Supervisorial District II Map
Supervisorial District III Map
Supervisorial District IV Map
Supervisorial District V Map
Supervisorial Districts - Population by Community
Public Comments - Since 7/26/2011

July 26, 2011: Board of Supervisors Approves Redistricting Map Proposal
The Board of Supervisors approved Map Proposal 17 D Amended on a 3-2 vote as the proposed new supervisorial district boundaires. On Tuesday, August 9, 2011 at 10:00 am the Board of Supervisors will conduct a public hearing to consider adoption of an ordinance establishing the approved map as the new supervisorial district boundaries. The following provides map and data for the approved redistricting proposal.

Map Proposal 17 D Amended
Map Proposal 17 D Amended - Community Population Summary Table
Map Proposal 17 D Amended - Demographic Data Map

July 26, 2011: Continuation of Board of Supervisors Public Hearing on Map Proposals.  
The Board of Supervisors will continue to Public Hearing to Consider Proposal to adjust the boundaries of county supervisorial districts based on the 2010 Census at 1:00 pm on July 26, 2011.

Board Order
Exhibit 1: Map Proposal 15
Exhibit 1: Map Proposal 15 - Community Population Summary Table
Exhibit 1: Map Proposal 15 Demographic Data Map
Exhibit 2: Map Proposal 16
Exhibit 2: Map Proposal 16 - Community Population Summary Table
Exhibit 2: Map Proposal 16 Demographic Data Map
Exhibit 3: Map Proposal 17
Exhibit 3: Map Proposal 17 - Community Population Summary Table
Exhibit 3: Map Proposal 17 Demographic Data Map
Exhibit 4: Map Proposal 17D
Exhibit 4: Map Proposal 17D - Community Population Summary Table
Exhibit 4: Map Proposal 17D Demographic Data Map
Exhibit 5: Map Proposal 17D Amended
Exhibit 5: Map Proposal 17D Amended - Community Population Summary Table 
Exhibit 5: Map Proposal 17D Amended Demographic Data Map (revised)
Exhibit 6: City of Brentwood Letter 


July 12, 2011: Continuation of Board of Supervisors Public Hearing on Map Proposals.  
The Board of Supervisors will continue to Public Hearing to Consider Proposal to adjust the boundaries of county supervisorial districts based on the 2010 Census at 11:15 am on July 12, 2011.

Agenda
Board Order
Exhibt 1
Map Proposal 15
Map Proposal 15 - Community Population Summary
Map Proposal 15 - Demographic Data Map
Map Proposal 16
Map Proposal 16 - Community Population Summary
Map Proposal 16 - Demographic Data Map
Map Proposal 17
Map Proposal 17 - Community Population Summary
Map Proposal 17 - Demographic Data Map
Map Proposal Submitted at Board Hearing
Map Proposal 17 D
Map Proposal 17 D - Community Population Summary
Map Proposal 17 D - Demographic Data Map

Board of Supervisors Public Hearing on Map Proposals
The Board of Supervisors held a public hearing on Tuesday, June 28th at 1 pm
to consider a report of Redistricting Map Proposals for County Supervisorial Districts based on 2010 Census data and public input received to date, and to consider approving a Redistricting Map proposal as the basis for an Ordinance to establish the decennial redistricting plan which adjust the supervisorial district boundaries for Contra Costa County.

Video of the June 28th Public Hearing

Board Agenda

Exhibit 1 (note, this is a large file. Quick Links below)
Exhibit 1: Seven Original Concept Maps Used in Public Workshops

Concept 1 Map	Concept 1 Population Summary
Concept 2 Map	Concept 2 Population Summary
Concept 3 Map	Concept 3 Population Summary
Concept 4 Map	Concept 4 Population Summary
Concept 5 (CC Times) Map	Concept 5 (CC Times) Population Summary
Concept 6 (CCCRDTF) Map	Concept 6 (CCCRDTF) Population Summary
Concept 7 (No City Split) Map	Concept 7 (No City Split) Population Summary

Exhibit 2 (note, very large file. Quick links provided below)
Exhibit 2: Board Member Redistricting Proposals

Submitted by:	Map	Population Summary	Rational (if provided)
District 1 Sup. John Gioia	Proposal 8 Map	Proposal 8 Population Summary	Proposal 8 Rationale
District 2 Sup. Gayle Uilkema	Proposal 9 Map	Proposal 9 Population Summary
District 2 Sup. Gayle Uilkema	Proposal 10 Map	Proposal 10 Population Summary
District 3 Sup. Mary Piepho	Proposal 11 Map	Proposal 11 Population Summary	Notes on map
District 4 Sup. Karen Mitchoff	Proposal 12 Map	Proposal 12 Population Summary	Proposal 12 Rationale
District 5 Sup. Federal Glover	Proposal 13 Map	Proposal 13 Population Summary

Exhibit 3: Public Comments and Proposed Maps (Note: This is a HUGE document, please see sections below).

Redistricting Workshop #1: Walnut Creek (Tice Valley Gymnasium)
Redistricting Workshop #2: Walnut Creek (Library)
Redistricting Workshop #3: Pleasant Hill
Redistricting Workshop #4: Martinez
Redistricting Workshop #5: Concond
Redistricting Workshop #6: Bay Point  
Redistricting Workshop #7: Antioch
Redistricting Workshop #8: Clayton
Redistricting Workshop #9: San Pablo
Redistricting Workshop #10: Oakley
Redistricting Workshop #11: Brentwood
Redistricting Workshop #12: Alamo
Redistricting Workshop #13: Pinole
Redistricting Workshop #14: Lafayette
Online Forms
Workshop Forms received via mail
Emailed comments
Letters  
Form Letter
Petitions
Maps Submitted
City Letters
Map Proposal submitted via DistrictBuilder
District Builder Plan A (reference: BOSTest1)
District Builder Plan B (reference: The Simplest Plan That Meets the Goals
District Builder Plan C (reference: Concept 4C1)
District Builder Plan D (reference: Abby's Plan 4)
District Builder Plan E (reference: CarolynPhinney1)
District Builder Plan F (reference: CarolynPhinney2)
District Builder Plan G (reference: BOSTest1a)
District Builder Plan H (reference: Concept #4 - modified)
District Builder Plan I (reference: Concept 4 - Modified5162011)
District Builder Plan J (reference: WC & SRV in District 3)
District Builder Plan K (reference: Concept #3 - Modified)
District Builder Plan L (reference: Ella51911)
District Builder Plan M (reference: Everyone Gets Waterfront Carolyn Phinney 3)
District Builder Plan N (reference: Concept 1 revised 2 Edi)
District Builder Plan O (reference: Ella5212011)
District Builder Plan P (reference: Jerome Pandell)
District Builder Plan Q (reference: BOSTest1b)
District Builder Plan R (reference: BOSTestRevise) 


Note: The Board Order contains a summary of the Public Comments received and a hard copy is avaible through the Clerk of the Board or the Department of Conservation and Development at (925) 335-1254.

Community Workshops
The Board of Supervisors and County staff is hosting Public Input Workshops throughout the County to provide an overview of the redistricting process, present map concepts, and receive comments and input. Please Note: The San Pablo workshops location has been corrected as of May 12th. A new workshop has been added in Lafayette on Wednesday, June 1st.  

The following map concepts will be discussed at the Public Input Workshops.

Concept 1
Concept 2
Concept 3
Concept 4
Concept 5 (Contra Costa Times)
Concept 6 (CCCRTF Map 2A)
Concept 7 (No City Splits)

If you are unable to attend a workshop, you can review the plans below and fill out a comment form online.  (comment form no longer available)

May 2nd: DistrictBuilder web application launched:
Create and share your Redistricting Proposal via Contra Costa County DistrictBuilder
Visit our DistrictBuilder page for more information about District Builder, including how to guides and a video of the "How to Use DistrictBuilder Webinar"

April 28th: May 3rd Board of Supervisors Agenda published

Board Order

2001 Supervisorial Districts Initial Analysis

Draft Boundary Concept 1

Draft Boundary Concept 2

Draft Boundary Concept 3

Draft Boundary Concept 4


March 24, 2011: Contra Costa County publishes 2010 Census Population by Current Supervisorial District Boundaries.

Contra Costa County adds Census 2010 Data to Countywide online Mapping tool.

March 8th, 2011: Census Bureau releases Census 2010 Redistricting Data

February 8th, 2011: Board of Supervisors Adopts Redistricting Work Program