Data Last Updated: December 1, 2024

MIDDLESEX County, MA ZIP Codes

MIDDLESEX County, MA Covers 108 ZIP Codes

ZIP Code	Classification	City	Population	Area Code(s)
ZIP Code 01431	General	Ashby	3,193	351/978
ZIP Code 01432	General	Ayer	8,221	978
ZIP Code 01434	General	Devens	1,652	978
ZIP Code 01450	General	Groton	11,298	978/351
ZIP Code 01460	General	Littleton	10,141	978/781/508
ZIP Code 01463	General	Pepperell	11,621	978/351
ZIP Code 01464	General	Shirley	7,427	978/351
ZIP Code 01469	General	Townsend	7,055	978
ZIP Code 01472	P.O. Box	West Groton	0	978/351
ZIP Code 01474	General	West Townsend	2,072	978
ZIP Code 01701	General	Framingham	33,005	508/774/978/781
ZIP Code 01702	General	Framingham	39,515	508/774/978/781
ZIP Code 01703	P.O. Box	Framingham	0	508/774/978/781
ZIP Code 01704	P.O. Box	Framingham	0	508/774/978/781
ZIP Code 01705	P.O. Box	Framingham	0	508/774/978/781
ZIP Code 01718	General	Acton	688	978/351/508/781
ZIP Code 01719	General	Boxborough	5,506	978/351/508
ZIP Code 01720	General	Acton	23,232	978/351/508/781
ZIP Code 01721	General	Ashland	18,832	508/774/978/781
ZIP Code 01730	General	Bedford	14,566	781/857
ZIP Code 01731	General	Hanscom AFB	1,555	781/857
ZIP Code 01741	General	Carlisle	5,237	978/351/508/781
ZIP Code 01742	General	Concord	18,545	978
ZIP Code 01746	General	Holliston	14,996	508/774
ZIP Code 01748	General	Hopkinton	18,758	508/774
ZIP Code 01749	General	Hudson	20,092	978/508/351
ZIP Code 01752	General	Marlborough	41,793	508/774/978
ZIP Code 01754	General	Maynard	10,730	978
ZIP Code 01760	General	Natick	36,659	508/774
ZIP Code 01770	General	Sherborn	4,401	508
ZIP Code 01773	General	Lincoln	5,651	781
ZIP Code 01775	General	Stow	7,190	978
ZIP Code 01776	General	Sudbury	18,934	978
ZIP Code 01778	General	Wayland	14,132	508/774
ZIP Code 01784	P.O. Box	Woodville	0	508/774
ZIP Code 01801	General	Woburn	40,891	781/617/978/339
ZIP Code 01803	General	Burlington	26,074	781/339
ZIP Code 01805	Unique	Burlington	0	781/339
ZIP Code 01813	Unique	Woburn	0	781/617/978/339
ZIP Code 01815	Unique	Woburn	0	781/617/978/339
ZIP Code 01821	General	Billerica	30,909	978/508
ZIP Code 01822	P.O. Box	Billerica	0	978/508
ZIP Code 01824	General	Chelmsford	26,881	978/781
ZIP Code 01826	General	Dracut	32,689	978/351/781
ZIP Code 01827	General	Dunstable	3,358	978/351
ZIP Code 01850	General	Lowell	16,670	978/351/781
ZIP Code 01851	General	Lowell	32,691	978/781
ZIP Code 01852	General	Lowell	36,708	978/351/781
ZIP Code 01853	P.O. Box	Lowell	0	978/351/781
ZIP Code 01854	General	Lowell	29,561	978/351
ZIP Code 01862	General	North Billerica	11,430	978/508
ZIP Code 01863	General	North Chelmsford	9,536	978/351
ZIP Code 01864	General	North Reading	15,554	978
ZIP Code 01865	P.O. Box	Nutting Lake	0	978/508
ZIP Code 01866	P.O. Box	Pinehurst	0	978/508
ZIP Code 01867	General	Reading	25,522	781
ZIP Code 01876	General	Tewksbury	31,105	978/351/781
ZIP Code 01879	General	Tyngsboro	12,368	978/351
ZIP Code 01880	General	Wakefield	27,071	781/339
ZIP Code 01886	General	Westford	24,618	978/351/508
ZIP Code 01887	General	Wilmington	23,349	978
ZIP Code 01888	P.O. Box	Woburn	0	781/617/978/339
ZIP Code 01889	Unique	North Reading	0	978
ZIP Code 01890	General	Winchester	22,970	781
ZIP Code 02138	General	Cambridge	37,982	617/857/508
ZIP Code 02139	General	Cambridge	39,525	617/781/857/339/978/508
ZIP Code 02140	General	Cambridge	21,447	617
ZIP Code 02141	General	Cambridge	15,130	617/781/857/339/978/508
ZIP Code 02142	General	Cambridge	4,499	617/781/857/339/978/508
ZIP Code 02143	General	Somerville	26,022	617/857
ZIP Code 02144	General	Somerville	25,497	617/857
ZIP Code 02145	General	Somerville	27,520	617/857
ZIP Code 02148	General	Malden	66,274	781/617/857/339
ZIP Code 02149	General	Everett	49,075	617/857
ZIP Code 02153	P.O. Box	Medford	0	617/857
ZIP Code 02155	General	Medford	61,483	781/339/617
ZIP Code 02156	P.O. Box	West Medford	0	781/339/617
ZIP Code 02176	General	Melrose	29,817	781/339/617
ZIP Code 02180	General	Stoneham	23,244	781/617
ZIP Code 02238	P.O. Box	Cambridge	0	617/781/857/339/978/508
ZIP Code 02420	General	Lexington	15,502	781/339
ZIP Code 02421	General	Lexington	18,950	781/339
ZIP Code 02451	General	Waltham	17,953	781/617/339/978/508
ZIP Code 02452	General	Waltham	15,340	781/617/339/978/508
ZIP Code 02453	General	Waltham	31,854	781/617/339/978/508
ZIP Code 02454	P.O. Box	Waltham	0	781/617/339/978/508
ZIP Code 02455	P.O. Box	North Waltham	0	617/781/857/339/978/508
ZIP Code 02456	P.O. Box	New Town	0	617/857/508
ZIP Code 02458	General	Newton	12,817	617/857/339
ZIP Code 02459	General	Newton Center	19,017	857/617
ZIP Code 02460	General	Newtonville	9,204	617/857/339
ZIP Code 02461	General	Newton Highlands	7,430	617
ZIP Code 02462	General	Newton Lower Falls	1,569	617
ZIP Code 02464	General	Newton Upper Falls	3,193	617
ZIP Code 02465	General	West Newton	12,415	617/857/339
ZIP Code 02466	General	Auburndale	8,434	617
ZIP Code 02467	General	Chestnut Hill	22,626	857/617
ZIP Code 02468	General	Waban	5,713	617/781
ZIP Code 02471	P.O. Box	Watertown	0	617/857
ZIP Code 02472	General	Watertown	35,392	617/857
ZIP Code 02474	General	Arlington	28,551	781/339
ZIP Code 02475	P.O. Box	Arlington Heights	0	781/339
ZIP Code 02476	General	Arlington	17,757	781/339
ZIP Code 02477	Unique	Watertown	0	617/857
ZIP Code 02478	General	Belmont	27,286	617/857
ZIP Code 02479	P.O. Box	Waverley	0	781/339
ZIP Code 02493	General	Weston	11,851	617
ZIP Code 02495	P.O. Box	Nonantum	0	617/857/339

* Indicates a Multi County ZIP Code, whose primary County is something other than Middlesex, MA.

Timezone(s): All Time Zones found within this county. In the United States, there are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau. The alignment between ZIP codes and time zones is not perfect. A single time zone can cover multiple ZIP codes, and, conversely, a single ZIP code could theoretically span across multiple time zones, although this is quite rare.	Eastern

Population: The total Population for Middlesex County, MA, taken from the 2020 U.S. Census DP1. This population total includes all people residing in and counts them regardless of citizenship or immigration status. Include are U.S. Citizens, permanent residents, temporary migrants, and undocumented workers. The total population represents people who live in the state, not just those present on the day of the census. State Population is critical in determining political representation, funding allocation, planning and policy-making, and demographic analysis.	1,632,002 (More Details)
Male Population: The sum of all males for Middlesex County, MA from the 2020 U.S. Census DP1. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The male population information is important for healthcare planning, policy making, social research, and economic planning and development.	797,539
Female Population: The sum of all females for Middlesex County, MA from the 2020 U.S. Census DP1. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The female population information is important for healthcare planning, policy making, social research, and economic planning and development.	834,463
Median Age: The median age of the total population of this county. Median age is not a future prediction, it is the actual number from the 2020 Census. Median age is the middle age of the population. Half the population is older than the average age and half is younger.	39

ZIP Codes: The total number of ZIP Codes which at least partially fall inside Middlesex County, MA. Did you know that approximately 23% of ZIP Codes cross county lines? Several even cross State lines. ZIP Codes do not follow other geographic boundaries because they were created exclusively for the expedient delivery of mail.	109
Cities: The total number of City names which are associated with ZIP Codes that partially or wholly cross into Middlesex County, MA. Alongside the official city name, USPS also recognizes certain alternate names for cities or towns that can be used in mailing addresses. These may include towns, villages, abbreviations, names in other languages, or names that have been commonly used historically.	78
Counties: The total number of counties associated with ZIP Codes that are at least partially part of Middlesex County, MA.	1
Area Codes: The total number of Area Codes associated with ZIP Codes in Middlesex County, MA. Area codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. Each area code identifies a specific geographic area (usually part of a state or territory) and allows calls to be routed to the correct area. There are approximately 350 area codes in use in the United States.	8

Total Area: The approximate amount of area covered by Middlesex, MA in square miles. This includes all land and water areas within the legal county boundaries.	847 square miles (county)
Land Area: The approximate amount of land area covered by Middlesex, MA in square miles. Land area data provided by the Census Bureau are based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each state. Land area is important in many types of statistical analysis. For example, population density, the number of people per unit of land area, is a commonly used statistic based on this data. Land area measurements are also important for urban planning, environmental studies, and economic analysis.	818 square miles (county)
Water Area: The approximate amount of water area covered by Middlesex, MA in square miles. Calculations for water area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompassed features such as lakes, reservoirs, rivers, and coastal water bodies. Water surface data are especially important for environmental and conservation planning, water resource management, transportation, and recreational planning.	29 square miles (county)

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MIDDLESEX, MA Demographic Information

* Demographic data is based on 2020 Census.

Total population of MIDDLESEX County, MA: Total Population from the 2020 Census. This reflects the exact population of the geographic area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	1,632,002
Male population of MIDDLESEX County, MA: The Male Population from the 2020 Census. This is not a forecast for the future, but an exact count for this geographic area at the time of the Census. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The Male Population information is important for healthcare planning, policy making, social research, and economic planning and development.	797,539
Female population of MIDDLESEX County, MA: The Female Population from the 2020 Census. This is not a forecast for the future, but an exact count for this geographic area at the time of the Census. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The Female Population information is important for healthcare planning, policy making, social research, and economic planning and development.	834,463
Median age (years): The Median Age of the Total Population from the 2020 Census for this geographic area. Median age is not a future prediction, it is the actual calculated age from the 2020 Census. Median age is the middle age of the population. Half the population is older than the average age and half is younger. Median Age can relate how young or old a geographic area is compared to others. If one area is 44 and the other is 40, then the first are is an average of 4 years older.	38.6
White Population: The White Population is an exact count from the 2020 Census for this geographic area. The numbers for the White Population are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including White. This count includes all who selected White/Caucasian in their response, even if they selected another race as well.	1,112,445
Black Population: The Black Population is an exact count from the 2020 Census for this geographic area. The numbers for the Black Population are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Black or African American. This count includes all who selected Black or African American in their response, even if they selected another race as well.	84,670
Indian Population: The American Indian and Alaska Native Population is an exact count from the 2020 Census for this geographic area and not estimates for the future. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including American Indian and Alaska Native. This count includes all who selected American Indian and Alaska Native in their response, even if they selected another race as well.	3,676
Asian Population: The Asian Population is an exact count from the 2020 Census for this geographic area, not future projections. On the U.S. Census questionnaire, people were asked to check all races which applied to them, including Chinese, Filipino, Asian Indian, Vietnamese, Korean, Japanese, or Other Asian. This count includes all who selected one of these options in their response, even if they selected another race as well.	210,462
Hawaiian Population: The Hawaiian or Pacific Islander Population is an exact count from the 2020 Census for this geographic area and are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Native Hawaiian and Pacific Islander. This count includes all who selected either Hawaiian or Pacific Islander in their response, even if they selected another race as well.	444
Hispanic Population: The Hispanic Population is an exact count from the 2020 Census for this geographic area and is not an estimate or future projection. On the 2020 U.S. Census questionnaire, people were first asked for their Ethnicity, including if they were from Hispanic, Latino, or Spanish Origin, including Mexican, Mexican American, Chicano, Puerto Rican, Cuban, or other ethnic origin. This count includes all who affirmed that they were part of this ethnic origin. Respondents who selected this option were also asked to select a race separately and would be counted once in this number as well as the race they chose as well. From the U.S. Census definition, Hispanic is an ethnic origin and not a race.	143,245
Median age (Male): The Median Age of all Males from the 2020 Census for this geographic area. The Male Median Age is the actual average from the 2020 Census, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older than the average age and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth.	37.3
Median age (Female): The Median Age of all Females from the 2020 Census for this geographic area. The Female Median Age is the actual average from the 2020 Census, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older than the average age and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth.	39.9
Total Households: Total Number of Households from the 2020 U.S. Census for this geographic area. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	625,916
Married-Couple Households: Total Married-Couple Households is based on the 2020 U.S. Census and is not an estimate. Under the U.S. Census Bureau definition, Married Couple Households refers to the count of households where the householder and his or her spouse are listed as members of the same household. It does include same-sex marriage households and the households themselves may also include other individuals, such as children or other relatives.
Average Household Size for MIDDLESEX County, MA: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.52
Average family size of MIDDLESEX County, MA: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.99
Total housing units for MIDDLESEX County, MA: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	658,283

MIDDLESEX County, MA ZIP Codes

MIDDLESEX County, MA Covers 108 ZIP Codes

MIDDLESEX, MA Demographic Information

MIDDLESEX County, MA Covers 78 Cities