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2026 Compare Cities Politics & Voting:
Boulder, CO vs Diamond Bar, CA

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Highlights
- Registered voters in Diamond Bar are 2.0% more likely to be registered as Democrats than registered voters in Boulder.
- Registered voters in Boulder, are 31.7% more likely to be registered as Democrats, than in the rest of the United States.
 Boulder, CODiamond Bar, CAUnited States
 Democrat  Unlock71.8%48.0%
 Republican22.0%  Unlock45.9%
 Independent Other  Unlock5.8%6.0%
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Learn More About Boulder, Colorado
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Learn More About Diamond Bar, California
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