Residential delivery area · Delaware
ZIP Code 19720: New Castle, DE
ZIP code 19720 uses the postal name New Castle, Delaware and lies entirely in New Castle County (Census 2020 ZIP-county file). About 62,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $75,403 (Census Bureau, ACS 2020-2024). By Census place, its land lies in New Castle (9%), Wilmington Manor (4%) and St. Georges (2%), and 1% in smaller places; 83% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- New Castle · its only residential ZIP
- County
- New Castle County
- Census places
- New Castle (9%); Wilmington Manor (4%) census-designated place; St. Georges (2%) census-designated place
- Neighborhoods
- Carriage Run, Oak Hollow, Stockton, Whilton GeoNames
- Metro area
- Philadelphia-Camden-Wilmington, PA-NJ-DE-MD
- House district
- DE at large 119th Congress
- State
- Delaware
- Time zone
- Eastern
- Land area
- 38.3 sq mi · 1,629 people per sq mi
Where is ZIP code 19720?
19720 centers on 39.645°, -75.604° and covers 38.3 square miles of land plus 3.1 of water. It borders 8 ZIP codes: 19706, 19804, 19713, 19801, 19733, 19701, 19702, 19709.
The map draws ZIP code areas only. For the streets inside 19720, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 19720 compare with the rest of New Castle County?
| Measure | 19720 | In New Castle County | In DE |
|---|---|---|---|
| People (ACS 2020-2024) | 62,392 | 1st of 31 | 1st of 68 |
| Median household income | $75k | 19th of 22 | 34th of 48 |
| Median home value | $265k | 17th of 22 | 42nd of 50 |
Its median household income is higher than in 56% of U.S. residential ZIP codes, and it is denser than 83% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 19720?
The 2020 Census counted 61,043 people in 19720; the ACS, which samples households over 2020-2024, estimates 62,392. Between the 2010 and 2020 censuses its population grew 3.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 62,392
- 2020 Census count
- 61,043+3.0% since 2010 (59,250)
- Households
- 23,641
- Median age
- 39.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 19720?
Of the 62,392 people the ACS estimates in 19720, 21.8% are under 18 and 15.8% are 65 or older. The largest group by race and Hispanic origin is Black (not Hispanic) (42.3%), then White (not Hispanic) (33.2%).
- Under 1821.8%
- 18 to 6462.4%
- 65 and older15.8%
- Black, not Hispanic42.3%
- White, not Hispanic33.2%
- Hispanic or Latino17.7%
- Other or two or more4.4%
- Asian, not Hispanic2.5%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 19720 earn?
Median household income is $75,403 (ACS 2020-2024), the 19th highest of the 22 ranked ZIP codes in New Castle County. It is not measurably different from 2015-2019 ($77,152 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $75,403
- Income per person
- $36,945
- Below the poverty line
- 10.9%
- Unemployed (of the labor force)
- 3.7%
- Adults 25+ with a bachelor's degree
- 23.3%
- Adjusted gross income per tax return, 2022
- $57,07229,640 returns; wages 80% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 19720?
FHFA's house price index for 19720, built from repeat sales and appraisals of the same homes, rose 89% from 2015 to 2025 and rose 56% from 2020 to 2025, and moved +3.2% in 2025.
- Median home value (owners' estimate)
- $265,000
- Median gross rent
- $1,363
- Homes owned by their occupants
- 67.6%
- Housing units
- 24,756
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 19720?
1,540 business establishments had a location in this ZIP code in 2023, 140 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade226
- Construction181
- Other services (except public administration)146
- Transportation and warehousing143
- Wholesale trade131
- Administrative and support and waste management and remediation services130
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 19720?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 19706 | Delaware City | 2,038 | $84k | 4.9 mi |
| 19804 | Wilmington | 18,779 | $80k | 5.1 mi |
| 19713 | Newark | 30,747 | $77k | 5.9 mi |
| 19801 | Wilmington | 16,327 | $53k | 6.4 mi |
| 19733 | Saint Georges | 186 | $83k | 6.5 mi |
| 19701 | Bear | 42,984 | $111k | 6.5 mi |
| 19702 | Newark | 55,683 | $92k | 6.9 mi |
| 19709 | Middletown | 53,234 | $133k | 11.1 mi |
| 08070 | Pennsville, NJ | 12,511 | $76k | 5.0 mi (near) |
| 08023 | Deepwater, NJ | 375 | $66k | 6.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name New Castle?
2 more ZIP codes carry the postal name New Castle, DE without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for them.
| ZIP | County |
|---|---|
| 19721 | New Castle County |
| 19726 | New Castle County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.