ZIP Code 01821

ZIP Code Tabulation Area in Middlesex County, Massachusetts.

Population: 30,203
Median household income: $142,564
Median home value: $581,300

ZIP Code 01821 (Middlesex County, Massachusetts) is home to about 30,203 residents. The median household income of $142,564 is above the Middlesex County median ($126,779).

Between 2019 and 2023, ZIP Code 01821's population declined 7.9% from 32,797 to 30,203, while its median gross rent rose 40.9% from $1,569 to $2,211.

74.3% of homes are single-family detached houses. The typical home was built around 1972.

Demographics

ACS 2019–2023

Population: 30,203
Median age: 44.6 yrs
Median household income: $142,564
Median home value: $581,300
Median gross rent: $2,211
Housing units: 11,666
Homeownership rate: 81.1%
Bachelor's degree or higher: 41.7%
Unemployment rate: 3.0%

Trends

ACS 5-year · 2019–2023

Population

32,79730,203

Median household income

$106,141$142,564

Median home value

$408,600$581,300

Median gross rent

$1,569$2,211

Year	Population	Median household income	Median home value	Median gross rent
2019	32,797	$106,141	$408,600	$1,569
2020	32,936	$116,445	$421,700	$1,687
2021	31,499	$126,146	$444,300	$1,783
2022	30,854	$138,397	$532,600	$2,104
2023	30,203	$142,564	$581,300	$2,211

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 54.3%

5 to 1713.1%

18 to 247.1%

25 to 3413.8%

35 to 4412.2%

45 to 5413.8%

55 to 6416.7%

65 to 7412.2%

75 and over6.8%

	Count	Share
Under 5	1,290	4.3%
5 to 17	3,967	13.1%
18 to 24	2,152	7.1%
25 to 34	4,154	13.8%
35 to 44	3,687	12.2%
45 to 54	4,168	13.8%
55 to 64	5,047	16.7%
65 to 74	3,691	12.2%
75 and over	2,047	6.8%

Race & ethnicity

	Count	Share
White (non-Hispanic)	24,099	79.8%
Black or African American	1,031	3.4%
American Indian & Alaska Native	0	0.0%
Asian	2,843	9.4%
Native Hawaiian & Pacific Islander	8	0.0%
Some other race	146	0.5%
Two or more races	957	3.2%
Hispanic or Latino (any race)	1,119	3.7%

Educational attainment (age 25+)

No high school diploma5.3%

High school graduate25.6%

Some college or associate's27.4%

Bachelor's degree25.3%

Graduate or professional degree16.4%

	Count	Share
No high school diploma	1,207	5.3%
High school graduate	5,835	25.6%
Some college or associate's	6,236	27.4%
Bachelor's degree	5,777	25.3%
Graduate or professional degree	3,739	16.4%

Commute to work

Mean travel time to work: 27 min

Drove alone68.9%

Carpooled7.9%

Public transit1.7%

Walked0.8%

Bicycle0.0%

Worked from home19.9%

Other means0.8%

How workers get to work

	Count	Share
Drove alone	12,492	68.9%
Carpooled	1,433	7.9%
Public transit	316	1.7%
Walked	141	0.8%
Bicycle	0	0.0%
Worked from home	3,608	19.9%
Other means	150	0.8%

Travel time

	Count	Share
Under 15 min	3,137	21.6%
15 to 29 min	5,089	35.0%
30 to 44 min	3,812	26.2%
45 to 59 min	1,468	10.1%
60+ min	1,026	7.1%

Households

Average household size: 2.61
Poverty rate: 4.1% (1,223 of 30,142)

	Count	Share
Family households	8,307	72.2%
Nonfamily households	3,204	27.8%

Housing

Median year structure built: 1972

Occupancy

	Count	Share
Occupied	11,511	98.7%
Vacant	155	1.3%

Tenure (of occupied units)

	Count	Share
Owner-occupied	9,334	81.1%
Renter-occupied	2,177	18.9%

1-unit, detached74.3%

1-unit, attached6.0%

2 to 4 units4.4%

5 to 19 units3.1%

20 or more units11.8%

Mobile home & other0.3%

Units in structure

	Count	Share
1-unit, detached	8,671	74.3%
1-unit, attached	701	6.0%
2 to 4 units	512	4.4%
5 to 19 units	363	3.1%
20 or more units	1,381	11.8%
Mobile home & other	38	0.3%

ZIP Code 01821

Demographics

Trends

Age distribution

Race & ethnicity

Educational attainment (age 25+)

Commute to work

Households

Housing

Geography

Counties this ZIP covers

Compare with nearby ZIP codes

National ZIP rankings

Nearby ZIP codes