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Washington Mills, Iowa | |
|---|---|
Unincorporated community | |
| Coordinates: 42°18′2″N 90°46′56″W / 42.30056°N 90.78222°W | |
| Country | |
| State | |
| County | Dubuque County |
| Elevation | 817 ft (249 m) |
| Time zone | UTC-6 (CST) |
| • Summer (DST) | UTC-5 (CDT) |
| GNIS feature ID | 464793[1] |
Washington Mills is an unincorporated community in Dubuque County, Iowa, United States.

Washington Mills' population was 75 in 1887,[2] and was 112 in 1902.[3]