ZIP Codes ...
While some people have used a ZIP code to identify a community, the purpose of the ZIP code was to make mail delivery more efficient by grouping addresses together. Although the ZIP Code doesn't specifically identify a community like New Castle, it does identify addresses that are in (or near) New Castle. It's important to remember that the boundaries of a ZIP Code are defined by the needs of the USPS and can be changed, re-assigned or overlapped with other ZIP Codes.
The ZIP code for New Castle: 35119<1>
Referenced GNIS Records ...
GNIS ID #152613 (Name of Record: New Castle)
Class: populated place
A place or area having clustered or scattered buildings and a permanent population (such as a city, settlement, town or village). The boundaries may or may not coincide with the perceived population.
A 'populated place' record may have a corresponding 'census' or 'civil' record. The information contained in the 'populated place' record applies only to the class and should not be confused with either the 'census' and 'civil' classes.
Map Name: Gardendale
Lat: 33.6489919 Lon: -86.7686023 [Map]
Referenced FIPS Records ...
FIPS Code: 01/53904 (Place Name: New Castle)
County: Jefferson (FIPS State/County: 01/073)
Identifies a populated place (ie- New Castle) that is wholly or substantially located outside the boundaries of any incorporated place or CDP (Census Designated Place) that has an authoritative common name recognized by the U.S. Geological Survey (USGS).
GSA Code: 2223
MSA Code: 1000