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2025 Compare Cities Politics & Voting:
Sioux City, IA vs Alton, IL

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Highlights
- Registered voters in Alton are 4.8% more likely to be registered as Democrats than registered voters in Sioux City.
- Registered voters in Sioux City, are 29.5% less likely to be registered as Democrats, than in the rest of the United States.
 Sioux City, IAAlton, ILUnited States
 Democrat  Unlock38.9%48.0%
 Republican56.6%  Unlock45.9%
 Independent Other  Unlock7.0%6.0%
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Learn More About Sioux City, Iowa
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Learn More About Alton, Illinois
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