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2026 Compare Cities Politics & Voting:
Castle Rock, CO vs Aurora, IL

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Highlights
- Registered voters in Aurora are 41.8% more likely to be registered as Democrats than registered voters in Castle Rock.
- Registered voters in Castle Rock, are 31.2% less likely to be registered as Democrats, than in the rest of the United States.
 Castle Rock, COAurora, ILUnited States
 Democrat  Unlock51.9%48.0%
 Republican54.7%  Unlock45.9%
 Independent Other  Unlock6.7%6.0%
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Learn More About Castle Rock, Colorado
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Learn More About Aurora, Illinois
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