Baltimore ZIP codes: US ZIP code list for Baltimore, Maryland (MD)
Quick answer
Baltimore, Maryland has 12 US ZIP codes, running 21201 to 21230 inside Baltimore City. Each carries the same 6% 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
- 12Median covered metro: 12
- Number span
- 3021201 to 21230
- Sorting prefixes
- 212USPS sectional centers
- Sales tax
- 6%Same in every listed code
Baltimore ZIP code footprint
How Baltimore's ZIP footprint compares with national norms.
12 ZIP codes are listed for Baltimore, covering a population of 565,239. They span 30 numbers, 21201 through 21230. The median covered metro on this site lists 12 codes; Baltimore ranks 2 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 12 codes share the 212 prefix. That first trio is the sectional center facility — the USPS plant that sorts mail for the region — so every piece addressed to Baltimore passes through one facility. The range runs 21201 to 21230.
ZIP boundaries are carrier routes, not city limits. USPS redraws them when delivery volume shifts; Maryland redraws tax and municipal lines on a different schedule entirely. A Baltimore mailing address does not prove an address sits inside Baltimore city limits, and a single code can straddle the boundary.
ZIP codes in Baltimore
All within Baltimore City, Maryland.
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 Maryland, even without local add-ons, remote sellers should validate the full delivery address against the Comptroller of Maryland lookup at the time of sale.
Frequently asked questions
Common questions about this area.
- How many ZIP codes does Baltimore have?
- 12. They run from 21201 to 21230 across 1 sectional center prefix (212), spanning 30 numbers.
- What is the first ZIP code in Baltimore, MD?
- 21201 is the lowest-numbered code serving Baltimore. Numbering runs roughly northeast to west nationally, so Baltimore's 212 prefix reflects its position in the Maryland sorting network, not its size.
- Do all Baltimore ZIP codes have the same sales tax rate?
- Inside Baltimore city limits, yes — 6% 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.
Baltimore sales tax breakdown and calculator
More Baltimore data
Other Baltimore datasets on this site.
- Baltimore population and income
- Baltimore sales tax rate
- Baltimore property tax
- Baltimore cost of living
- Baltimore home values and rent
- Baltimore crime rates
- Baltimore public schools
- Baltimore weather normals
- Baltimore commute times
Statewide: Maryland cities · Maryland ZIP codes · Maryland sales tax · Maryland counties