County ZIP codes · Delaware · FIPS 10005
Sussex County, DE ZIP Codes
Sussex County, Delaware has 24 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 23 residential and 1 for PO boxes or a single organization. 22 of the residential ones lie mainly in Sussex County and 1 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $60,703 in 19933 (Bridgeville) to $125,491 in 19930 (Bethany Beach) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Sussex County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $71,108 and $94,103.
They carry 23 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 23 residential ZIP codes in Sussex County
22 ZIP codes lie mainly in Sussex County; 1 more reaches into it from a neighboring county and follows the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 19966 | Millsboro | 35,884 | 403 | $78k | $318k | 100% |
| 19958 | Lewes | 31,938 | 676 | $97k | $535k | 100% |
| 19973 | Seaford | 26,834 | 319 | $64k | $278k | 93% |
| 19963 | Milford | 23,500 | 224 | $71k | $323k | 50% |
| 19947 | Georgetown | 20,760 | 174 | $71k | $322k | 100% |
| 19956 | Laurel | 16,327 | 163 | $66k | $260k | 100% |
| 19968 | Milton | 15,486 | 242 | $87k | $437k | 100% |
| 19971 | Rehoboth Beach | 14,886 | 829 | $102k | $609k | 100% |
| 19975 | Selbyville | 10,862 | 425 | $89k | $463k | 100% |
| 19933 | Bridgeville | 10,597 | 158 | $61k | $269k | 100% |
| 19945 | Frankford | 9,640 | 155 | $88k | $443k | 100% |
| 19970 | Ocean View | 8,524 | 914 | $94k | $527k | 100% |
| 19950 | Greenwood | 7,918 | 109 | $75k | $293k | 76% |
| 19940 | Delmar | 7,540 | 183 | $65k | $235k | 100% |
| 19939 | Dagsboro | 7,490 | 288 | $90k | $421k | 100% |
| 19960 | Lincoln | 6,774 | 224 | $67k | $276k | 100% |
| 19941 | Ellendale | 3,435 | 113 | $75k | $244k | 100% |
| 19930 | Bethany Beach | 3,014 | 515 | $126k | $887k | 100% |
| 19967 | Millville | 2,376 | 1,464 | $98k | $483k | 100% |
| 19951 | Harbeson | 2,245 | 251 | $96k | $472k | 100% |
| 19944 | Fenwick Island | 636 | 512 | $121k | $1.19M | 100% |
| 19931 | Bethel | 375 | 314 | $99k | $295k | 100% |
Partly in Sussex County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 19952 | Harrington | 10,908 | 120 | $77k | $283k | 2% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
4 ZIP codes of Sussex County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Sussex | Elsewhere |
|---|---|---|
| 19973 | 93% | Dorchester County 7% |
| 19963 | 50% | Kent County 50% |
| 19952 | 2% | Kent County 98% |
| 19950 | 76% | Kent County 24% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 19969 | Nassau |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Sussex County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Sussex County starts with 199.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 199 | Wilmington, DE (SCF 197) | 24 | 44 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.