Place List: Mercer County, Illinois, USA
Place List: Mercer County, Illinois, USA, sorted alphabetically (number of total localities in parentheses):
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1. Aledo, Mercer County, Illinois, USA  2. Alexis, Mercer County, Illinois, USA 3. Gilchrest, Mercer County, Illinois, USA |
4. Joy, Mercer County, Illinois, USA 5. Mercer County, Illinois, USA 6. Preemption, Mercer County, Illinois, USA |
7. Seaton, Mercer County, Illinois, USA 8. Viola, Mercer County, Illinois, USA (2) |