If available, see below for a list of known fire department frequencies for New Castle County in Delaware. Or, navigate to your city or town to view your local city and/or fire department frequencies within New Castle County, Delaware.
| Arden | Ardencroft | Ardentown | Bellefonte | |
| Delaware City | Elsmere | Middletown | New Castle | |
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| Newark | Newport | Odessa | Townsend | |
| Wilmington | ||||