List of 1 Zip Codes in New Castle County, Maryland

On this page, we'll list out the 1 New Castle County, Maryland ZIP codes we have, including the land area and county name of each code.

Maryland is the 42nd largest state by total land area, with a land area of 12,406 square miles (32,131 square kilometers) and has a total population of 6,037,624 people as of the most recent U.S. Census survey.

New Castle County makes up approximately 0.25% of the total land area for Maryland and we have 1 zip codes for the county in our database, which you can see details of below, with land area information for each zip code.

ZIP Code Land Area (Sq. Meters) Land Area (Sq. Miles) Land Area (Sq. Kilometers)
21912 81,430,200 31 81

More Counties in Maryland

If you want to search and find zip codes for different counties in Maryland, the list below contains links to each of the 25 Maryland counties we have data for.

Data Source(s)

All of the zip code data on this page is sourced from the United States Census Bureau geography reference files.

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  • "List of 1 Zip Codes in New Castle County, Maryland". Accessed on December 3, 2023.

  • "List of 1 Zip Codes in New Castle County, Maryland"., Accessed 3 December, 2023

  • List of 1 Zip Codes in New Castle County, Maryland. Retrieved from