Data Last Updated: December 1, 2024

MIDDLESEX County, MA ZIP Codes

MIDDLESEX County, MA Covers 108 ZIP Codes

ZIP Code	Classification	Timezone	Area Code(s)
01431	General	Eastern	351/978
01432	General	Eastern	978
01434	General	Eastern	978
01450	General	Eastern	978/351
01460	General	Eastern	978/781/508
01463	General	Eastern	978/351
01464	General	Eastern	978/351
01469	General	Eastern	978
01472	P.O. Box	Eastern	978/351
01474	General	Eastern	978
01701	General	Eastern	508/774/978/781
01702	General	Eastern	508/774/978/781
01703	P.O. Box	Eastern	508/774/978/781
01704	P.O. Box	Eastern	508/774/978/781
01705	P.O. Box	Eastern	508/774/978/781
01718	General	Eastern	978/351/508/781
01719	General	Eastern	978/351/508
01720	General	Eastern	978/351/508/781
01721	General	Eastern	508/774/978/781
01730	General	Eastern	781/857
01731	General	Eastern	781/857
01741	General	Eastern	978/351/508/781
01742	General	Eastern	978
01746	General	Eastern	508/774
01748	General	Eastern	508/774
01749	General	Eastern	978/508/351
01752	General	Eastern	508/774/978
01754	General	Eastern	978
01760	General	Eastern	508/774
01770	General	Eastern	508
01773	General	Eastern	781
01775	General	Eastern	978
01776	General	Eastern	978
01778	General	Eastern	508/774
01784	P.O. Box	Eastern	508/774
01801	General	Eastern	781/617/978/339
01803	General	Eastern	781/339
01805	Unique	Eastern	781/339
01813	Unique	Eastern	781/617/978/339
01815	Unique	Eastern	781/617/978/339
01821	General	Eastern	978/508
01822	P.O. Box	Eastern	978/508
01824	General	Eastern	978/781
01826	General	Eastern	978/351/781
01827	General	Eastern	978/351
01850	General	Eastern	978/351/781
01851	General	Eastern	978/781
01852	General	Eastern	978/351/781
01853	P.O. Box	Eastern	978/351/781
01854	General	Eastern	978/351
01862	General	Eastern	978/508
01863	General	Eastern	978/351
01864	General	Eastern	978
01865	P.O. Box	Eastern	978/508
01866	P.O. Box	Eastern	978/508
01867	General	Eastern	781
01876	General	Eastern	978/351/781
01879	General	Eastern	978/351
01880	General	Eastern	781/339
01886	General	Eastern	978/351/508
01887	General	Eastern	978
01888	P.O. Box	Eastern	781/617/978/339
01889	Unique	Eastern	978
01890	General	Eastern	781
02138	General	Eastern	617/857/508
02139	General	Eastern	617/781/857/339/978/508
02140	General	Eastern	617
02141	General	Eastern	617/781/857/339/978/508
02142	General	Eastern	617/781/857/339/978/508
02143	General	Eastern	617/857
02144	General	Eastern	617/857
02145	General	Eastern	617/857
02148	General	Eastern	781/617/857/339
02149	General	Eastern	617/857
02153	P.O. Box	Eastern	617/857
02155	General	Eastern	781/339/617
02156	P.O. Box	Eastern	781/339/617
02176	General	Eastern	781/339/617
02180	General	Eastern	781/617
02238	P.O. Box	Eastern	617/781/857/339/978/508
02420	General	Eastern	781/339
02421	General	Eastern	781/339
02451	General	Eastern	781/617/339/978/508
02452	General	Eastern	781/617/339/978/508
02453	General	Eastern	781/617/339/978/508
02454	P.O. Box	Eastern	781/617/339/978/508
02455	P.O. Box	Eastern	617/781/857/339/978/508
02456	P.O. Box	Eastern	617/857/508
02458	General	Eastern	617/857/339
02459	General	Eastern	857/617
02460	General	Eastern	617/857/339
02461	General	Eastern	617
02462	General	Eastern	617
02464	General	Eastern	617
02465	General	Eastern	617/857/339
02466	General	Eastern	617
02467	General	Eastern	857/617
02468	General	Eastern	617/781
02471	P.O. Box	Eastern	617/857
02472	General	Eastern	617/857
02474	General	Eastern	781/339
02475	P.O. Box	Eastern	781/339
02476	General	Eastern	781/339
02477	Unique	Eastern	617/857
02478	General	Eastern	617/857
02479	P.O. Box	Eastern	781/339
02493	General	Eastern	617
02495	P.O. Box	Eastern	617/857/339

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

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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)

MIDDLESEX, MA Demographic Information

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