Maps and Data
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Final Countywide Supervisorial District Map
District 1 Map
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.
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.
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
Redistricting Public Hearing on Tuesday, June 28th
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
Redistricting Board Order
Exhibit 1: Seven Original Concept Maps Used in Public Workshops
Exhibit 2: Board Member Redistricting Map Proposals
Exhibit 3: Public Comments and Proposed Maps
Note: The Exhibits are all very large documents and may take awhile to download. The maps are all provided in an easier to download format below. 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.
Seven Original Concept Maps Used in Public Workshops
Exhibit 2: Board Member Redistricting Proposals
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)
Community Workshop Maps
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.
The following map concepts will be discussed at the Public Input Workshops.
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. (note, comment form is no longer available)
Initial Analysis and Draft Concepts for May 3 Board Meeting
The 2010 Census data forms the basis of the redistricting effort. The Department of Conservation and Development analyzed the data and created maps to illustrate different district boundary scenarios.
May 3rd, Board Order
2001 Supervisorial Districts Initial Analysis
Draft Boundary Concept 1
Draft Boundary Concept 2
Draft Boundary Concept 3
Draft Boundary Concept 4
Current (2001) Board of Supervisor District Boundaries
Final Map from 2001 Supervisorial Redistricting process
2001 Supervisorial District Boundaries with 2010 Population Estimates
2010 Census Population by Current Supervisorial District and Place Name
2010 Census Data available online
Table 3A: Total population by Race and Hispanic or Latino: April 1, 2010 for Incorporated Cities and CDPs by County. Prepared by the State Department of Finance
Contra Costa County has 2010 data available on the Countywide GIS website
for Census Tracts and Census Block Groups. To add Census data, go to 'layers' and check the Census Tracts (2010). You can use the "information" tool to view more information about a particular tract.
Proposed 2011 Redistricting Options
Once 2011 Redistricting map proposals are developed, they will be available here.
The State Department of Finance has Census 2010 summary tables
available for California, counties, cities, and census designated places (CDPs).
The Census Bureau has the following on-line resources that will allow anyone to see the population data for their community:
American FactFinder: American FactFinder is a user friendly website to access the new 2010 Census Data.
2010 Redistricting Data available for Download: The Census Bureau provides access to the 2010 Census Redistricting Data from an FTP site in a single zip package. Users of the FTP application need to upzip the package after downloading. The data is provided in a flat ACSII format and must be imported into aspreadsheet/database software.
2010 Census Redistricting TIGER/Line Shapefiles: The Census Bureau has provides TIGER/Line Shapefiles for legal and statistical geographic areas plus features such as roads, railroads, and rivers.