Chattanooga ZIP codes: US ZIP code list for Chattanooga, Tennessee (TN)
Quick answer
Chattanooga, Tennessee has 12 US ZIP codes, running 37402 to 37421 inside Hamilton County. Each carries the same 9.25% 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
- 2037402 to 37421
- Sorting prefixes
- 374USPS sectional centers
- Sales tax
- 9.25%Same in every listed code
Chattanooga ZIP code footprint
How Chattanooga's ZIP footprint compares with national norms.
12 ZIP codes are listed for Chattanooga, covering a population of 187,030. They span 20 numbers, 37402 through 37421. The median covered metro on this site lists 12 codes; Chattanooga 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 374 prefix. That first trio is the sectional center facility — the USPS plant that sorts mail for the region — so every piece addressed to Chattanooga passes through one facility. The range runs 37402 to 37421.
ZIP boundaries are carrier routes, not city limits. USPS redraws them when delivery volume shifts; Tennessee redraws tax and municipal lines on a different schedule entirely. A Chattanooga mailing address does not prove an address sits inside Chattanooga city limits, and a single code can straddle the boundary.
ZIP codes in Chattanooga
All within Hamilton County, Tennessee.
- 374029.25%
- 374039.25%
- 374049.25%
- 374059.25%
- 374069.25%
- 374079.25%
- 374089.25%
- 374099.25%
- 374119.25%
- 374159.25%
- 374199.25%
- 374219.25%
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 Tennessee, local jurisdictions set their own increments, so remote sellers should validate the full delivery address against the Tennessee Department of Revenue lookup at the time of sale.
Frequently asked questions
Common questions about this area.
- How many ZIP codes does Chattanooga have?
- 12. They run from 37402 to 37421 across 1 sectional center prefix (374), spanning 20 numbers.
- What is the first ZIP code in Chattanooga, TN?
- 37402 is the lowest-numbered code serving Chattanooga. Numbering runs roughly northeast to west nationally, so Chattanooga's 374 prefix reflects its position in the Tennessee sorting network, not its size.
- Do all Chattanooga ZIP codes have the same sales tax rate?
- Inside Chattanooga city limits, yes — 9.25% 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.
Chattanooga sales tax breakdown and calculator
More Chattanooga data
Other Chattanooga datasets on this site.
- Chattanooga population and income
- Chattanooga sales tax rate
- Chattanooga property tax
- Chattanooga cost of living
- Chattanooga home values and rent
- Chattanooga crime rates
- Chattanooga public schools
- Chattanooga weather normals
- Chattanooga commute times
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