| Harbor Light Bay, Illinois | |
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| — Unincorporated community — | |
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Harbor Light Bay, Illinois
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| Coordinates: | |
| Country | United States |
| State | Illinois |
| County | Clinton |
| Elevation | 472 ft (144 m) |
| Time zone | Central (CST) (UTC-6) |
| • Summer (DST) | CDT (UTC-5) |
| Area code(s) | 618 |
| GNIS feature ID | 1810435[1] |
Harbor Light Bay is an unincorporated community in Clinton County, Illinois, United States. Harbor Light Bay is located on the western shore of Carlyle Lake 2.5 miles (4.0 km) south-southwest of Keyesport.
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