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2026 Compare Cities Politics & Voting:
Frederick, MD vs Rock Island, IL

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Highlights
- Registered voters in Rock Island are 12.2% more likely to be registered as Democrats than registered voters in Frederick.
- Registered voters in Frederick, are 6.8% less likely to be registered as Democrats, than in the rest of the United States.
 Frederick, MDRock Island, ILUnited States
 Democrat  Unlock50.5%48.0%
 Republican47.4%  Unlock45.9%
 Independent Other  Unlock7.3%6.0%
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Learn More About Frederick, Maryland
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Learn More About Rock Island, Illinois
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