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ZIP codes in Hartford County

110 ZIPs touch Hartford County, Connecticut. The blue dashed line is the county border; orange ZIPs reach into it.

110

ZIP codes

2

cross the county line

926,263

people in these ZIPs

8

counties in CT

Most people

← All Connecticut ZIP codes

Hartford County ZIP list

More counties in Connecticut

All 8 counties in Connecticut

Questions people actually ask

How many ZIP codes are in Hartford County, Connecticut?

110 ZIP codes reach into Hartford County, including 49 PO Box or single-address ZIPs placed by the town they serve. 2 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Hartford County has the most people?

06010 (Bristol) has about 61,684 residents, the most of any ZIP touching Hartford County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Hartford County and another county?

Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Hartford County. For one address, pin the exact spot on the ZIP finder to see its county.

Where does this list come from?

ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.

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Updated 2026-11-10 · Where the data comes from