ZIP Codes in Massachusetts
Massachusetts's ZIP codes cover a state anchored firmly by Boston, one of the oldest and most historically significant cities in the country, with a population of around 7 million concentrated heavily in the eastern third of the state. Central and western Massachusetts, including the Berkshires near the New York border, remain considerably more rural, a sharp contrast to the dense, university-packed Boston metro area.
How ZIP Codes Are Organized Across the State
Massachusetts's ZIP codes fall within the 01000–02799 range under the USPS system. Boston and the surrounding metro area occupy the middle of that range around 021xx–022xx, Worcester, in central Massachusetts, sits near 016xx, and Springfield, further west, carries codes closer to 011xx. Cape Cod and the islands of Martha's Vineyard and Nantucket push toward the upper end around 025xx–026xx.
Massachusetts's Major Metro Areas by Population
The chart below shows just how dominant the Boston metro area is within Massachusetts's overall population, with Worcester and Springfield trailing well behind.
Boston's ZIP codes cover one of the most academically dense metro areas in the world, home to Harvard, MIT, and dozens of other colleges and universities that keep the region's population younger and more transient than most major US cities. Cambridge, just across the Charles River, has its own distinct ZIP codes despite functioning almost as an extension of downtown Boston, driven heavily by the biotech and tech industries clustered around Kendall Square. For a broader comparison, our full US ZIP code directory shows how Massachusetts's ranges fit alongside every other state.
Central and Western Massachusetts
West of Boston, Worcester serves as the commercial hub of central Massachusetts, with a more affordable cost of living than the capital and a steady stream of new residents priced out of Boston proper. Further west, Springfield anchors the Pioneer Valley near the border with Connecticut, historically an industrial manufacturing center that has worked to diversify its economy in recent decades. The Berkshires, in the far west near New York, shift into a more rural, mountainous character entirely.
Cape Cod and the Islands
Cape Cod, Martha's Vineyard, and Nantucket carry some of the most seasonally variable ZIP codes in the entire state - quiet, modestly populated communities in winter that swell dramatically each summer with tourists and seasonal residents. Property values in these ZIP codes rank among the highest in Massachusetts, driven heavily by vacation-home demand rather than year-round housing need.
Why ZIP Codes Matter Beyond Mail
In Massachusetts, ZIP codes are closely tied to the state's education and biotech industries - Boston and Cambridge ZIP codes in particular see enormous seasonal population shifts tied to the academic calendar, with tens of thousands of students arriving and departing each year. Real estate listings across the Boston metro rely heavily on ZIP-level data to signal proximity to universities, hospitals, and the MBTA transit system. And insurers use Cape Cod and island ZIP codes to assess coastal flood and hurricane risk.
Border Regions and Neighboring States
Massachusetts shares borders with five states, more than most New England states. To the west, the Berkshires border New York. To the south, Connecticut and Rhode Island share a similar mix of coastal and inland New England towns. And to the north, New Hampshire and Vermont continue the same rolling hills and forest found throughout western Massachusetts.
Finding the Right ZIP Code
Use the list below to browse Massachusetts'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 Massachusetts have?
Massachusetts has several hundred ZIP codes, concentrated most heavily around the Boston metro area, with far fewer covering the more rural central and western parts of the state.
What ZIP code range does Massachusetts use?
Massachusetts ZIP codes generally fall between 01000 and 02799, with western Massachusetts toward the lower end and Cape Cod and the islands further along the range.
Which Massachusetts city has the most ZIP codes?
Boston and its immediate metro area, including Cambridge and the surrounding suburbs, account for the largest number of individual ZIP codes.
Can I look up a Massachusetts 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 Boston metro area, researching a Cape Cod summer property, or simply trying to pin down the right ZIP code for a specific Massachusetts address, the data below covers every corner of the state - from the Berkshires to the islands.