Wilmington ZIP codes: US ZIP code list for Wilmington, Delaware (DE)
Quick answer
Wilmington, Delaware has 7 US ZIP codes, running 19801 to 19809 inside New Castle County. Each carries the same 0% combined sales tax rate. ZIP boundaries are postal delivery routes, not tax boundaries — a code that crosses a city or district line can hold more than one rate, so destination-based sellers should validate by full street address.
- ZIP codes
- 7Median covered metro: 12
- Number span
- 919801 to 19809
- Sorting prefixes
- 198USPS sectional centers
- Sales tax
- 0%Same in every listed code
Wilmington ZIP code footprint
How Wilmington's ZIP footprint compares with national norms.
7 ZIP codes are listed for Wilmington, covering a population of 71,106. They span 9 numbers, 19801 through 19809. The median covered metro on this site lists 12 codes; Wilmington ranks 78 of 94 by count. Large metros carry more codes because USPS splits a delivery area once carrier volume outgrows one route cluster, not because the city is geographically bigger.
All 7 codes share the 198 prefix. That first trio is the sectional center facility — the USPS plant that sorts mail for the region — so every piece addressed to Wilmington passes through one facility. The range runs 19801 to 19809.
ZIP boundaries are carrier routes, not city limits. USPS redraws them when delivery volume shifts; Delaware redraws tax and municipal lines on a different schedule entirely. A Wilmington mailing address does not prove an address sits inside Wilmington city limits, and a single code can straddle the boundary.
ZIP codes in Wilmington
All within New Castle County, Delaware.
Why ZIP-based rate lookup is unreliable
USPS redraws ZIP codes when carrier routes change. Tax jurisdictions move with annexations, county lines and voter-approved districts. The two never line up. In Delaware, even without local add-ons, remote sellers should validate the full delivery address against the Delaware Division of Revenue lookup at the time of sale.
Frequently asked questions
Common questions about this area.
- How many ZIP codes does Wilmington have?
- 7. They run from 19801 to 19809 across 1 sectional center prefix (198), spanning 9 numbers.
- What is the first ZIP code in Wilmington, DE?
- 19801 is the lowest-numbered code serving Wilmington. Numbering runs roughly northeast to west nationally, so Wilmington's 198 prefix reflects its position in the Delaware sorting network, not its size.
- Do all Wilmington ZIP codes have the same sales tax rate?
- Inside Wilmington city limits, yes — 0% applies. A code that extends past the city line can carry a different rate on part of its territory. Validate by street address, not ZIP, when the sale is destination-based. Confirm current rates with your state revenue agency before filing.
Wilmington sales tax breakdown and calculator
More Wilmington data
Other Wilmington datasets on this site.
- Wilmington population and income
- Wilmington sales tax rate
- Wilmington property tax
- Wilmington cost of living
- Wilmington home values and rent
- Wilmington crime rates
- Wilmington public schools
- Wilmington weather normals
- Wilmington commute times
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