Zip code 19721: New Castle, Delaware
This zip has no delivery boundary. The map shows its post office location and nearby zip codes.
About 19721
19721 is a non-residential zip code for New Castle, Delaware (New Castle County). It has no delivery area of its own, so the Census Bureau doesn't publish population or housing figures for it. Codes like this are usually assigned to post office boxes, or to a single organization such as a university, hospital, government agency or large company that gets enough mail to need its own zip code.
For a picture of the people who live around 19721, see the residential zip codes in the nearby list below.
Geography
- City (USPS)
- New Castle
- State
- Delaware
- County
- New Castle County
- Center point
- 39.5645° N, 75.5970° W
- Time zone
- Eastern Time (UTC-5, UTC-4 in summer)
- Zip type
- PO box or unique zip
Zip codes near 19721
| Zip | City | Distance | IncomeMedian income |
|---|---|---|---|
| 19712 | Newark, DE · PO box | 0 mi | — |
| 19714 | Newark, DE · PO box | 0 mi | — |
| 19715 | Newark, DE · PO box | 0 mi | — |
| 19718 | Newark, DE · PO box | 0 mi | — |
| 19725 | Newark, DE · PO box | 0 mi | — |
| 19850 | Wilmington, DE · PO box | 0 mi | — |
| 19880 | Wilmington, DE · PO box | 0 mi | — |
| 19890 | Wilmington, DE · PO box | 0 mi | — |
| 19891 | Wilmington, DE · PO box | 0 mi | — |
| 19892 | Wilmington, DE · PO box | 0 mi | — |
| 19896 | Wilmington, DE · PO box | 0 mi | — |
| 19897 | Wilmington, DE · PO box | 0 mi | — |
Questions about 19721
What city is zip code 19721?
19721 is assigned to New Castle, Delaware. The city name is the one the Postal Service prefers for mail addressed to this zip code.
What county is 19721 in?
19721 is in New Castle County, Delaware.
What time zone is 19721 in?
19721 is in Eastern Time.
What zip codes are near 19721?
The closest zip codes to 19721 are 19712, 19714, 19715, 19718, 19725.
Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 19721, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.