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2026 Compare Cities Politics & Voting:
Castro Valley, CA vs Rocklin, CA

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Highlights
- Registered voters in Rocklin are 49.4% less likely to be registered as Democrats than registered voters in Castro Valley.
- Registered voters in Castro Valley, are 38.5% more likely to be registered as Democrats, than in the rest of the United States.
 Castro Valley, CARocklin, CAUnited States
 Democrat  Unlock39.5%48.0%
 Republican14.5%  Unlock45.9%
 Independent Other  Unlock9.3%6.0%
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Learn More About Castro Valley, California
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Learn More About Rocklin, California
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