| Waltham, Illinois | |
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| — Unincorporated community — | |
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Waltham, Illinois
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| Coordinates: | |
| Country | United States |
| State | Illinois |
| County | LaSalle |
| Elevation | 692 ft (211 m) |
| Time zone | Central (CST) (UTC-6) |
| • Summer (DST) | CDT (UTC-5) |
| Area code(s) | 815 & 779 |
| GNIS feature ID | 423284[1] |
Waltham, Illinois is an unincorporated community located on E. 8th Road in Waltham Township in LaSalle County, approximately 6 miles north of Utica. It contains a church and several homes constructed in the 1960s.
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