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.