New Castle, DE ZIP Codes
One ZIP code serves New Castle, Delaware: 19720. Together they are home to 62,392 residents in 23,641 households. That is more than the 5,579 people counted inside New Castle city limits, because these ZIP codes reach past its boundary.
New Castle city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 5,579 |
| Households | 2,774 |
| Median household income | $89,205 |
| Median home value | $285,100 |
| Median age | 48.5 |
| Median rent | $1,739 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 62,392 |
| Households (sum of ZIP codes) | 23,641 |
| Median household income, range across ZIP codes | $75,403 (19720) to $75,403 (19720) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $75,403 |
| Homeowners | 67.6% |
| Households with kids under 18 | 28.1% |
| Moved in the past year | 10.5% |
| Carrier routes in EDDM2GO's route library | 39 routes, 23,179 homes (1 of 1 ZIP codes) |
Every ZIP code in New Castle
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 19720 | New Castle | 62,392 | 23,641 | $75,403 | $265,000 | 67.6% | 28.1% | 10.5% | 39 | 24,786 | 9% of its land; mailing city |
A ZIP code is listed for New Castle when at least 10% of its land lies inside New Castle city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is New Castle. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside New Castle.
Counties
- New Castle County — 32 ZIP codes
Nearby cities sharing these ZIP codes
- Wilmington Manor — 1 ZIP code
Price a mailing to New Castle ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in New Castle, DE?
- 19720. A ZIP code is listed for New Castle when at least 10% of its land lies inside New Castle city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is New Castle.
- What is the population of New Castle, DE?
- The Census Bureau counts 5,579 residents inside New Castle city limits (ACS 2020–2024). The 1 ZIP code that serve New Castle hold 62,392 residents in all.
- What is the median household income in New Castle, DE?
- $89,205 inside New Castle city limits, per the Census Bureau. Across its ZIP codes the medians run from $75,403 to $75,403.
- How many carrier routes and mailboxes are in New Castle, DE?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 39 carrier routes reaching 23,179 residential and 1,607 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.