|Elevation||889 ft (271 m)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|GNIS feature ID||455900|
Dewar is an unincorporated community in eastern Black Hawk County, Iowa, United States. It lies along local roads northeast of the city of Waterloo, the county seat of Black Hawk County. Its elevation is 889 feet (271 m). Although Dewar is unincorporated, it has a post office with the ZIP code of 50623, which opened on 25 October 1887.
- Rand McNally. The Road Atlas '08. Chicago: Rand McNally, 2008, p. 39.
- U.S. Geological Survey Geographic Names Information System: Dewar, Iowa
- Zip Code Lookup
- U.S. Geological Survey Geographic Names Information System: Dewar Post Office
- Hartman, John C. (1915). History of Black Hawk County, Iowa, and Its People, Volume 1. S. J. Clarke Publishing Company. p. 307.
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