Contra Costa County's official Voter Information Guide. The County of Contra Costa does not endorse any candidate — each candidate's statement here is reproduced verbatim, in their own words, as submitted to the Contra Costa County Registrar of Voters. Source: https://www.contracostavote.gov/elections/ Some of County of Contra Costa's candidate endorsements are not yet in our data. They'll be added when we next update our data.