ZIP Codes in Connecticut
Connecticut packs roughly 3.6 million residents into one of the smallest states in the country by land area, and its ZIP codes reflect that density - even the state's more rural towns tend to cover far less ground than a typical rural ZIP code in the Midwest or Mountain West. Connecticut's postal geography splits fairly clearly between its southwestern "Gold Coast" suburbs near New York City, the industrial cities along the central corridor, and the quieter, more rural northeast known as the "Quiet Corner."
How ZIP Codes Are Organized Across the State
Connecticut's ZIP codes fall within the 06000–06999 range under the USPS system, one of the more compact ranges in the country given the state's small size. Bridgeport and the southwestern Fairfield County suburbs sit around 066xx, Hartford, the state capital, occupies 061xx, and New Haven, home to Yale University, carries codes near 065xx. This tight numerical range mirrors just how close together Connecticut's major cities actually are on the map.
Connecticut's Major Metro Areas by Population
The chart below shows how population spreads across Connecticut's largest cities - more evenly distributed than in many states, without one city dominating the rest by a wide margin.
Hartford's ZIP codes cover Connecticut's capital and long-standing insurance industry hub, home to some of the oldest insurance companies in the country. New Haven, further south, blends Yale University's academic presence with a diverse, historically industrial city core. Bridgeport, the state's largest city by population, sits along the coast and has a notably different economic profile from the wealthier suburbs surrounding it. For a wider national comparison, our full US ZIP code directory shows how Connecticut's compact range fits alongside every other state.
Fairfield County and the Gold Coast
Southwestern Connecticut, particularly Fairfield County towns like Greenwich, Darien, and New Canaan, is often called the "Gold Coast" for its proximity to New York City and some of the highest median household incomes in the country. ZIP codes here sit close to the border with New York, and many residents commute daily into Manhattan by train, a pattern that shapes both the real estate market and the demographic character of these ZIP codes compared to the rest of the state.
The Quiet Corner and Rural Connecticut
In sharp contrast, northeastern Connecticut's "Quiet Corner" region remains largely rural, with small towns, farmland, and forest covering an area that feels far removed from the state's dense southwestern suburbs despite being only an hour or two away by car. ZIP codes here cover comparatively larger areas with lower population density, more in line with rural New England than the commuter-heavy corridor near New York.
Why ZIP Codes Matter Beyond Mail
In Connecticut, ZIP codes are closely tied to school district quality and property values, particularly in the wealthy Fairfield County suburbs where boundaries can mean significant differences in home prices between adjacent towns. Insurance companies headquartered in Hartford use ZIP-level data extensively for their own underwriting models. And commuters throughout the state rely on ZIP codes to estimate proximity to Metro-North and Amtrak rail lines connecting to New York City and Boston.
Border Regions and Neighboring States
Connecticut shares borders with three states, each shaping a different edge of its ZIP code map. To the west, the New York border defines the wealthy Gold Coast commuter suburbs. To the north, the line with Massachusetts blends into similar New England small-town character. And to the east, the border with Rhode Island connects Connecticut's Quiet Corner to a comparably rural stretch of southern New England.
Finding the Right ZIP Code
Use the list below to browse Connecticut's ZIP codes by city, county, or population - sorted so the most populous areas surface first. Each entry links through to a detailed page with additional demographic data. If you're trying to identify the ZIP code for a specific address rather than browsing by city, the search tool at the top of this page will get you there faster than scrolling through the full list.
Frequently Asked Questions
How many ZIP codes does Connecticut have?
Connecticut has around 250 ZIP codes, a relatively high number for its size given the state's dense population and closely spaced towns.
What ZIP code range does Connecticut use?
Connecticut ZIP codes fall between 06000 and 06999, one of the most compact ranges of any state due to Connecticut's small geographic footprint.
Which Connecticut city has the most ZIP codes?
Hartford, Bridgeport, and New Haven each have a substantial number of ZIP codes given their size, reflecting Connecticut's fairly evenly distributed population across several major cities.
Can I look up a Connecticut ZIP code by city name?
Yes, use the search tool on this page or browse the full list below, which is organized by city and sorted by population.
Whether you're relocating to the Fairfield County commuter belt, researching property near Hartford, or simply trying to pin down the right ZIP code for a specific Connecticut address, the data below covers every corner of the state - from the Gold Coast to the Quiet Corner.