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