If available, see below for a list of known fire department frequencies for Sioux County in Iowa. Or, navigate to your city or town to view your local city and/or fire department frequencies within Sioux County, Iowa.
| Alton | Boyden | Chatsworth | Granville | |
| Hawarden | Hospers | Hull | Ireton | |
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| Matlock | Maurice | Orange City | Rock Valley | |
| Sioux Center | ||||