New castle zip code

There are several places called New Castle, so I'll provide you with a list of some of the most well-known ones along with their corresponding zip codes:

1. New Castle, Delaware - 19720
2. New Castle, Indiana - 47362
3. New Castle, Kentucky - 40051
4. New Castle, New Hampshire - 03854
5. New Castle, Pennsylvania - 16101
6. New Castle, Virginia - 24127

Please note that there may be other places called New Castle with different zip codes. If you're looking for a specific one, please let me know and I'll do my best to provide the correct information.