Rock Island County, Illinois
Rock Island County is a county in the U.S. state of Illinois. In the 2020 census, 144,672 people lived there.[1] The county seat is Rock Island.
References
- "QuickFacts: Rock Island County, Illinois". United States Census Bureau. Retrieved August 11, 2023.
Municipalities and communities of Rock Island County, Illinois, United States | ||
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| Cities |  Map of Illinois highlighting Rock Island County | |
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| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
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