New Castle
Source:
Delaware
New Castle is a major-metro county in Delaware with 29 ZIP codes, 533,487 people, and top-decile household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, New Castle, DE sits among US counties with a top-decile household income, on a major-metro county population base, across a multi-ZIP patchwork.
- Top 6%
- household income vs 3,210 US counties
- 533,487
- combined ZIP population
- 29
- USPS ZIP codes covered
- $102,468
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
New Castle lands in the national county income distribution as top-decile household income on major-metro county footing (FIPS 10003, 29 ZIPs, combined population 533,487). Sort the ZIP table by population before treating the county mean as uniform.
High-income counties with wide ZIP mosaics hide sharp internal gradients. The densest ZIP here is 19720 (New Castle) with 59,250 residents - open it beside a thin rural code from the table before treating the county mean as uniform. HUD Fair Market Rents and FBI county tables attach to FIPS 10003, so scorecards stay county-keyed while household income stays ZIP-keyed.
Save two ZIPs from the table into your shortlist, then open a compare link - that is the return path a static county summary cannot replace. All figures here come from Census ACS 2023 5-Year Estimates and USPS ZCTA files.
29
Total ZIPs
533,487
Total Population
ZIP Codes in New Castle
Side-by-side: Compare 19720 vs 19702 →
| ZIP Code | City | Population | Density |
|---|---|---|---|
| 19720 | New Castle | 59,250 | 617 |
| 19702 | Newark | 51,899 | 708 |
| 19711 | Newark | 51,322 | 724 |
| 19805 | Wilmington | 40,937 | 2,971 |
| 19701 | Bear | 39,194 | 569 |
| 19808 | Wilmington | 38,442 | 1,061 |
| 19709 | Middletown | 35,107 | 170 |
| 19713 | Newark | 30,408 | 858 |
| 19810 | Wilmington | 25,011 | 1,223 |
| 19802 | Wilmington | 24,621 | 2,997 |
| 19803 | Wilmington | 21,364 | 655 |
| 19804 | Wilmington | 17,944 | 927 |
| 19707 | Hockessin | 16,483 | 482 |
| 19801 | Wilmington | 16,286 | 1,521 |
| 19703 | Claymont | 14,471 | 1,424 |
| 19809 | Wilmington | 14,049 | 775 |
| 19734 | Townsend | 11,651 | 58 |
| 19806 | Wilmington | 9,560 | 1,915 |
| 19807 | Wilmington | 7,405 | 146 |
| 19717 | Newark | 3,770 | 7,834 |
| 19706 | Delaware City | 1,822 | 191 |
| 19716 | Newark | 1,568 | 11,520 |
| 19730 | Odessa | 451 | 127 |
| 19731 | Port Penn | 252 | 102 |
| 19733 | Saint Georges | 110 | 1,036 |
| 19710 | Montchanin | 41 | 142 |
| 19736 | Yorklyn | 32 | 93 |
| 19732 | Rockland | 25 | 15 |
| 19735 | Winterthur | 12 | 24 |
Frequently Asked Questions
What is the population of New Castle?
New Castle has a total population of 533,487 across 29 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in New Castle?
New Castle includes 29 ZIP codes: 19720, 19702, 19711, 19805, 19701, 19808, 19709, 19713, 19810, 19802, and more.