ZIP Code Tabulation Area · Massachusetts

ZIP Code 01721: Middlesex County, MA

ZIP Code 01721 (Middlesex County, Massachusetts) has an estimated 18,873 residents in 7,643 households. The median household income is $127,539, the median home value is $611,700 and the median gross rent is $2,452/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

18,873

Margin of error ±26

Median household income

$127,539

Margin of error ±$10,749

Median home value

$611,700

Margin of error ±$18,288

Median gross rent

$2,452/mo

Margin of error ±$298

Median age

42.1 yrs

Margin of error ±1.4 yrs

Mean travel time to work

36.8 min

Margin of error ±4.2 min

How ZIP 01721 compares with Massachusetts and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 0172142.1 yrsMassachusetts40.0 yrsUnited States38.9 yrs

Median household income

ZIP 01721$127,539Massachusetts$103,960United States$80,734

Per capita income

ZIP 01721$70,893Massachusetts$57,897United States$44,673

Poverty rate

ZIP 017213.5%Massachusetts10.0%United States12.5%

Unemployment rate

ZIP 017215.4%Massachusetts5.2%United States5.2%

Bachelor's degree or higher

ZIP 0172160.7%Massachusetts47.3%United States35.7%

Median home value

ZIP 01721$611,700Massachusetts$562,100United States$332,700

Median gross rent

ZIP 01721$2,452/moMassachusetts$1,762/moUnited States$1,413/mo

Owner-occupied homes

ZIP 0172175.3%Massachusetts62.5%United States65.2%

Mean travel time to work

ZIP 0172136.8 minMassachusetts29.1 minUnited States26.4 min

Worked from home

ZIP 0172122.7%Massachusetts18.6%United States15.1%

All figures for ZIP 01721

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 01721 — ACS 2020–2024 5-year estimates
MeasureZIP 01721Margin of errorMassachusettsUnited States
Total population18,873±267,044,056334,922,499
Median age42.1 yrs±1.4 yrs40.0 yrs38.9 yrs
Households7,643±3222,785,042129,227,496
Median household income$127,539±$10,749$103,960$80,734
Per capita income$70,893±$4,944$57,897$44,673
Poverty rate3.5%±1.5 pts10.0%12.5%
Unemployment rate5.4%±2.1 pts5.2%5.2%
Bachelor's degree or higher60.7%±4.5 pts47.3%35.7%
Median home value$611,700±$18,288$562,100$332,700
Median gross rent$2,452/mo±$298$1,762/mo$1,413/mo
Owner-occupied homes75.3%±4.6 pts62.5%65.2%
Mean travel time to work36.8 min±4.2 min29.1 min26.4 min
Worked from home22.7%±3.3 pts18.6%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 01721
GroupZIP 01721MassachusettsUnited States
White alone, not Hispanic or Latino62.7%66.6%57.4%
Black or African American alone, not Hispanic or Latino4.9%6.4%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.1%0.1%0.5%
Asian alone, not Hispanic or Latino15.6%7.3%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.0%0.2%
Some other race alone, not Hispanic or Latino2.9%1.2%0.6%
Two or more races, not Hispanic or Latino5.0%5.1%4.3%
Hispanic or Latino (of any race)8.7%13.3%19.3%

Where ZIP 01721 is

State
Massachusetts
Main county
Middlesex County
Land area
12.34 sq mi· about 1,529 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Middlesex County

01701 Framingham, MA01702 Framingham, MA01718 Middlesex County, MA01719 Middlesex County, MA01720 Middlesex County, MA01730 Middlesex County, MA01731 Hanscom AFB, MA01741 Middlesex County, MA01742 Middlesex County, MA01746 Middlesex County, MA01748 Middlesex County, MA01749 Hudson, MA01752 Marlborough, MA01754 Maynard, MA01760 Middlesex County, MA01770 Middlesex County, MA01773 Middlesex County, MA01775 Middlesex County, MA01776 Middlesex County, MA01778 Cochituate, MA01801 Woburn, MA01803 Burlington, MA01821 Pinehurst, MA01824 Middlesex County, MA

See every ZIP code in Massachusetts, or compare ZIP 01721 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.