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Hartford ZIP codes: US ZIP code list for Hartford, Connecticut (CT)

Quick answer

Hartford, Connecticut has 6 US ZIP codes, running 06103 to 06120 inside Hartford County. Each carries the same 6.35% 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
6Median covered metro: 12
Number span
1806103 to 06120
Sorting prefixes
061USPS sectional centers
Sales tax
6.35%Same in every listed code

Hartford ZIP code footprint

How Hartford's ZIP footprint compares with national norms.

6 ZIP codes are listed for Hartford, covering a population of 121,054. They span 18 numbers, 06103 through 06120. The median covered metro on this site lists 12 codes; Hartford ranks 85 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 6 codes share the 061 prefix. That first trio is the sectional center facility — the USPS plant that sorts mail for the region — so every piece addressed to Hartford passes through one facility. The range runs 06103 to 06120.

ZIP boundaries are carrier routes, not city limits. USPS redraws them when delivery volume shifts; Connecticut redraws tax and municipal lines on a different schedule entirely. A Hartford mailing address does not prove an address sits inside Hartford city limits, and a single code can straddle the boundary.

ZIP codes in Hartford

All within Hartford County, Connecticut.

Source: Connecticut Department of Revenue Services rate tables · rates as published for 2026

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 Connecticut, even without local add-ons, remote sellers should validate the full delivery address against the Connecticut Department of Revenue Services lookup at the time of sale.

Frequently asked questions

Common questions about this area.

How many ZIP codes does Hartford have?
6. They run from 06103 to 06120 across 1 sectional center prefix (061), spanning 18 numbers.
What is the first ZIP code in Hartford, CT?
06103 is the lowest-numbered code serving Hartford. Numbering runs roughly northeast to west nationally, so Hartford's 061 prefix reflects its position in the Connecticut sorting network, not its size.
Do all Hartford ZIP codes have the same sales tax rate?
Inside Hartford city limits, yes — 6.35% 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.

Hartford sales tax breakdown and calculator

Other Hartford datasets on this site.

Statewide: Connecticut cities · Connecticut ZIP codes · Connecticut sales tax · Connecticut counties