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2026 Compare Cities Politics & Voting:
Union City, CA vs San Mateo, CA

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Highlights
- Registered voters in San Mateo are 3.1% less likely to be registered as Democrats than registered voters in Union City.
- Registered voters in Union City, are 38.5% more likely to be registered as Democrats, than in the rest of the United States.
 Union City, CASan Mateo, CAUnited States
 Democrat  Unlock75.7%48.0%
 Republican14.5%  Unlock45.9%
 Independent Other  Unlock5.9%6.0%
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Learn More About Union City, California
Overview
Cost of Living
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Crime
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Economy
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Voting
Learn More About San Mateo, California
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