Data Last Updated: January 1, 2025

Middlesex County, MA ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Middlesex, MA.	109 ZIP Codes (83 General, 21 PO Box, 5 Unique, & 0 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Middlesex, MA. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	351, 978, 508, 774, 781, 617, 857, 339
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. 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.	Eastern
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Middlesex, MA from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	1,632,002 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	25017
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Boston-Cambridge-Newton, MA-NH
Land Area: The approximate amount of land area covered by Middlesex, MA in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	818 square miles
Water Area: The approximate amount of water area covered by Middlesex, MA in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	29 square miles
Coordinates: The latitude/longitude centroid coordinates for Middlesex County, MA.	-71.391802, 42.485573
Quick Link: Copy the direct link to the Middlesex, MACounty page and use anywhere you like!	https://www.zip-codes.com/county/ma-middlesex.asp

Middlesex, MA ZIP Code Boundaries

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Middlesex County, MA Covers 109 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 01431	General	Ashby	3,193	0.20%
ZIP Code 01432	General	Ayer	8,221	0.50%
ZIP Code 01434	General	Devens	1,652	0.10%
ZIP Code 01450	General	Groton	11,298	0.69%
ZIP Code 01460	General	Littleton	10,141	0.62%
ZIP Code 01463	General	Pepperell	11,621	0.71%
ZIP Code 01464	General	Shirley	7,427	0.46%
ZIP Code 01469	General	Townsend	7,055	0.43%
ZIP Code 01472	P.O. Box	West Groton	0	0.00%
ZIP Code 01474	General	West Townsend	2,072	0.13%
ZIP Code 01701	General	Framingham	33,005	2.02%
ZIP Code 01702	General	Framingham	39,515	2.42%
ZIP Code 01703	P.O. Box	Framingham	0	0.00%
ZIP Code 01704	P.O. Box	Framingham	0	0.00%
ZIP Code 01705	P.O. Box	Framingham	0	0.00%
ZIP Code 01718	General	Acton	688	0.04%
ZIP Code 01719	General	Boxborough	5,506	0.34%
ZIP Code 01720	General	Acton	23,232	1.42%
ZIP Code 01721	General	Ashland	18,832	1.15%
ZIP Code 01730	General	Bedford	14,566	0.89%
ZIP Code 01731	General	Hanscom AFB	1,555	0.10%
ZIP Code 01741	General	Carlisle	5,237	0.32%
ZIP Code 01742	General	Concord	18,545	1.14%
ZIP Code 01746	General	Holliston	14,996	0.92%
ZIP Code 01748	General	Hopkinton	18,758	1.15%
ZIP Code 01749	General	Hudson	20,092	1.23%
ZIP Code 01752	General	Marlborough	41,793	2.56%
ZIP Code 01754	General	Maynard	10,730	0.66%
ZIP Code 01760	General	Natick	36,659	2.25%
ZIP Code 01770	General	Sherborn	4,401	0.27%
ZIP Code 01773	General	Lincoln	5,651	0.35%
ZIP Code 01775	General	Stow	7,190	0.44%
ZIP Code 01776	General	Sudbury	18,934	1.16%
ZIP Code 01778	General	Wayland	14,132	0.87%
ZIP Code 01784	P.O. Box	Woodville	0	0.00%
ZIP Code 01801	General	Woburn	40,891	2.51%
ZIP Code 01803	General	Burlington	26,074	1.60%
ZIP Code 01805	Unique	Burlington	0	0.00%
ZIP Code 01813	Unique	Woburn	0	0.00%
ZIP Code 01815	Unique	Woburn	0	0.00%
ZIP Code 01821	General	Billerica	30,909	1.89%
ZIP Code 01822	P.O. Box	Billerica	0	0.00%
ZIP Code 01824	General	Chelmsford	26,881	1.65%
ZIP Code 01826	General	Dracut	32,689	2.00%
ZIP Code 01827	General	Dunstable	3,358	0.21%
ZIP Code 01850	General	Lowell	16,670	1.02%
ZIP Code 01851	General	Lowell	32,691	2.00%
ZIP Code 01852	General	Lowell	36,708	2.25%
ZIP Code 01853	P.O. Box	Lowell	0	0.00%
ZIP Code 01854	General	Lowell	29,561	1.81%
ZIP Code 01862	General	North Billerica	11,430	0.70%
ZIP Code 01863	General	North Chelmsford	9,536	0.58%
ZIP Code 01864	General	North Reading	15,554	0.95%
ZIP Code 01865	P.O. Box	Nutting Lake	0	0.00%
ZIP Code 01866	P.O. Box	Pinehurst	0	0.00%
ZIP Code 01867	General	Reading	25,522	1.56%
ZIP Code 01876	General	Tewksbury	31,105	1.91%
ZIP Code 01879	General	Tyngsboro	12,368	0.76%
ZIP Code 01880	General	Wakefield	27,071	1.66%
ZIP Code 01886	General	Westford	24,618	1.51%
ZIP Code 01887	General	Wilmington	23,349	1.43%
ZIP Code 01888	P.O. Box	Woburn	0	0.00%
ZIP Code 01889	Unique	North Reading	0	0.00%
ZIP Code 01890	General	Winchester	22,970	1.41%
ZIP Code 02138	General	Cambridge	37,982	2.33%
ZIP Code 02139	General	Cambridge	39,525	2.42%
ZIP Code 02140	General	Cambridge	21,447	1.31%
ZIP Code 02141	General	Cambridge	15,130	0.93%
ZIP Code 02142	General	Cambridge	4,499	0.28%
ZIP Code 02143	General	Somerville	26,022	1.59%
ZIP Code 02144	General	Somerville	25,497	1.56%
ZIP Code 02145	General	Somerville	27,520	1.69%
ZIP Code 02148	General	Malden	66,274	4.06%
ZIP Code 02149	General	Everett	49,075	3.01%
ZIP Code 02153	P.O. Box	Medford	0	0.00%
ZIP Code 02155	General	Medford	61,483	3.77%
ZIP Code 02156	P.O. Box	West Medford	0	0.00%
ZIP Code 02176	General	Melrose	29,817	1.83%
ZIP Code 02180	General	Stoneham	23,244	1.42%
ZIP Code 02238	P.O. Box	Cambridge	0	0.00%
ZIP Code 02420	General	Lexington	15,502	0.95%
ZIP Code 02421	General	Lexington	18,950	1.16%
ZIP Code 02451	General	Waltham	17,953	1.10%
ZIP Code 02452	General	Waltham	15,340	0.94%
ZIP Code 02453	General	Waltham	31,854	1.95%
ZIP Code 02454	P.O. Box	Waltham	0	0.00%
ZIP Code 02455	P.O. Box	North Waltham	0	0.00%
ZIP Code 02456	P.O. Box	New Town	0	0.00%
ZIP Code 02458	General	Newton	12,817	0.79%
ZIP Code 02459	General	Newton Center	19,017	1.17%
ZIP Code 02460	General	Newtonville	9,204	0.56%
ZIP Code 02461	General	Newton Highlands	7,430	0.46%
ZIP Code 02462	General	Newton Lower Falls	1,569	0.10%
ZIP Code 02464	General	Newton Upper Falls	3,193	0.20%
ZIP Code 02465	General	West Newton	12,415	0.76%
ZIP Code 02466	General	Auburndale	8,434	0.52%
ZIP Code 02467	General	Chestnut Hill	22,626	1.39%
ZIP Code 02468	General	Waban	5,713	0.35%
ZIP Code 02471	P.O. Box	Watertown	0	0.00%
ZIP Code 02472	General	Watertown	35,392	2.17%
ZIP Code 02474	General	Arlington	28,551	1.75%
ZIP Code 02475	P.O. Box	Arlington Heights	0	0.00%
ZIP Code 02476	General	Arlington	17,757	1.09%
ZIP Code 02477	Unique	Watertown	0	0.00%
ZIP Code 02478	General	Belmont	27,286	1.67%
ZIP Code 02479	P.O. Box	Waverley	0	0.00%
ZIP Code 02493	General	Weston	11,851	0.73%
ZIP Code 02495	P.O. Box	Nonantum	0	0.00%

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Middlesex, MA, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Middlesex, MA Information

Middlesex County, MA Covers 109 ZIP Codes. This includes 83 General ZIP Codes, 21 PO Box ZIP Codes, and 5 Unique (reserved for Business and Volume Mail Receivers).

The population for Middlesex County is 1,632,002, according to the U.S. Census. Population Density is 1,995.11 persons per square mile. With 658,283 Housing Units, the Average Household Size is 2.52 persons. There are 625,916 Family Households with an Average Family Size of 2.99 persons. 2.37% of the population is without Health Insurance. The 66.95% Employment Rate is 7.15% above the national average of 59.8%.1,142,528 people aged 25+ have some educational achievement, with 57.77% (or 659,984 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 8 area codes serving this area including351, 978, 508, 774, 781, 617, 857 and 339. Middlesex is also located in the Eastern timezone and the current local time is shown above.

Middlesex is part of the Boston-Cambridge-Newton, MA-NH Core Based Statistical Area (CBSA). Its CBSA Code is 14460.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Middlesex, MA have 654,721 Residential mailboxes and 48,639 Business mailboxes.There are 44,770 businesses with a total of 939,801 employees. That is an average of 21.0 employees per business. Annual payroll for these businesses is $93,708,885,000. Other Demographics

Middlesex County Demographic Profile

Population & People

Total Population

1,632,002

Income

Median Household Income

$111,790

Housing

Total Housing Units

658,283

Health

Without Healthcare Coverage

2.37%

Business & Economy

Total Businesses

44,770

Families

Total Households

625,916

Employment

Employment Rate

66.95%

Education

Bachelor's Degree or Higher

57.77%

Total Population: Total number of people from the 2020 U.S. Census for Middlesex, MA. This reflects the exact count of this 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
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Middlesex, MA. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	1,646,276
Total Households: Total number of Households from the 2020 U.S. Census for Middlesex, MA. 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
Total Housing Units: 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
Average Household Size: 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: 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

Other Middlesex Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	654,721
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	48,639
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	764,917
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	445,942
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	169,784

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	44,770
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$24,198,451,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$93,708,885,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	939,801

Sum of all ZIP Codes assigned Middlesex, MA as their primary County.

References

U.S. Postal Service [Last Updated: 1/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 1/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov