We Found Out What Percent of Contra Costa Voted Yes (And No) On Proposition 50. Here’s the Breakdown.
CONTRA COSTA COUNTY, CALIFORNIA – Whether you were for or against it, lots of people here in CC county had strong opinions about California’s Proposition 50.
The measure passed on Tuesday, and lots of locals chimed in with their thoughts. But when it comes to the actuall ballot box, how did CC County vote?
We got post election details breaking down all the stats.
The Results
Contra Costa County voters backed Proposition 50 by a wide margin on election night: Yes 70.67% to No 29.33%. The county reported 930 of 930 precincts and 279,868 ballots cast, with turnout at 38.30%. These are Unofficial Results — Election Night Final and will be certified later this month.
Proposition 50 passed statewide, with major outlets tallying roughly 64% Yes as counts continued. The measure allows California to replace the independent citizens’ commission maps with legislative maps for U.S. House districts ahead of the 2026 midterms.
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How the votes broke down locally
Election-night reports show the county’s Prop 50 ballots were overwhelmingly cast by mail. Here’s the simple split from the registrar’s summary:
- Vote by Mail: 247,834 ballots
- In-Person: 32,034 ballots
- Total ballots cast: 279,868
- Registered voters: 730,646
- Turnout: 38.30%
Within that total, the county recorded:
- Yes: 197,522 votes
- No: 81,963 votes
- Yes share: 70.67%
- No share: 29.33%
What Prop 50 does next
With statewide passage, Prop 50 enables new, legislature-drawn congressional districts to be used starting in 2026, pending certification and any legal challenges. Analysts say Democrats could gain seats under the new map; Republicans have already signaled possible court fights.
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