01721 ZIP Code — Ashland, MA

Middlesex County, Massachusetts

ZIP code 01721 is located in Ashland, Massachusetts, within Middlesex County. It covers approximately 12.34 square miles and serves a population of 18,634 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 508/774/978.

About ZIP code 01721

The housing stock consists of a mix of housing types. Most homes were built in the 1980s, giving the area an established character. Median home value is $532,000. Owner-occupancy is high at 77%, well above the national average.

The gap between median ($124,311) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 35 minutes is near the national average.

Educational attainment is high — 61% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 01721 reflects a community defined by a highly educated population and high homeownership.

18,634

population

12.34

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

01721 ZIP code map

Cities in ZIP code 01721

Below are the cities the US Postal Service accepts for ZIP code 01721. Using any city not on this list may result in mail delivery delays.

City	Status
Ashland	Preferred

Nearby ZIP codes

01702 Framingham (1.8 mi) 01745 Fayville (2.8 mi) 01748 Hopkinton (3.9 mi) 01772 Southborough (4.3 mi) 01746 Holliston (4.5 mi) 01701 Framingham (4.7 mi) 01770 Sherborn (5.2 mi) 01760 Natick (6.2 mi) 01581 Westborough (7.2 mi) 01752 Marlborough (7.3 mi) 02053 Medway (7.7 mi) 01757 Milford (7.9 mi)

Demographics updated 05/2026

Population
Total population	18,634
Population density	1,510 / sq mi
State FIPS	25
County FIPS	017

Geography
Land area	12.34 sq mi
Water area	0.54 sq mi
Latitude	42.2594
Longitude	-71.4683
Timezone	Eastern (ET)
Area code	508/774/978

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	15.9%	23.8%	31.3%
$50k – $100k	26.2%	23.1%	25.9%
$100k – $200k	37.2%	32.1%	28.5%
Over $200k	20.7%	20.9%	14.3%

Demographics & statistics

18,634

Population

1,510

People per sq mi

41.8

Median age

$124,311

Median household income

$67,369

Per capita income

$532,000

Median home value

$2,273

Median monthly rent

76.7%

Home ownership

4.2%

Poverty rate

3.8%

Unemployment

6,379

Housing units

61.2%

Bachelor's or higher

Age distribution

Male Female

420

Under 5

434

487

5–9

504

569

10–14

587

404

15–19

418

433

20–24

448

1,272

25–34

1,315

1,478

35–44

1,526

1,183

45–54

1,223

810

55–59

837

528

60–64

545

968

65–74

1,001

410

75–84

424

202

85+

208

← Male

Female →

Age summary

Group	Count	%
Under 18	3,539	19.0%
18 and over	15,095	81.0%
65 and over	3,213	17.2%
Median age	41.8 years

Race & ethnicity

White 67.9%

Asian 13%

Hispanic or Latino 6.8%

Two or more races 4.4%

Black or African American 4.3%

Other race 3.3%

American Indian / Alaska Native 0.3%

Group	Count	%
White	13,585	67.9%
Asian	2,598	13%
Hispanic or Latino	1,360	6.8%
Two or more races	878	4.4%
Black or African American	856	4.3%
Other race	653	3.3%
American Indian / Alaska Native	64	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	15.9%	23.8%	31.3%
$50k – $100k	26.2%	23.1%	25.9%
$100k – $200k	37.2%	32.1%	28.5%
Over $200k	20.7%	20.9%	14.3%

Under $10k 2.7%

$10k–$15k 1.0%

$15k–$25k 3.0%

$25k–$35k 3.1%

$35k–$50k 3.9%

$50k–$75k 11.5%

$75k–$100k 13.2%

$100k–$150k 19.1%

$150k–$200k 14.4%

$200k+ 28.0%

Range	% of households
Under $10k	2.7%
$10k–$15k	1.0%
$15k–$25k	3.0%
$25k–$35k	3.1%
$35k–$50k	3.9%
$50k–$75k	11.5%
$75k–$100k	13.2%
$100k–$150k	19.1%
$150k–$200k	14.4%
$200k+	28.0%
Median income	$124,311

Housing

Home values

Under $50k 0.7%

$100k–$150k 0.3%

$200k–$300k 5.1%

$300k–$500k 38.5%

$500k–$1M 53.7%

$1M+ 1.6%

Housing overview

Metric	Value
Median home value	$532,000
Median rent / month	$2,273
Owner occupied	76.7%
Renter occupied	23.3%
Vacant	6.2%
Single-family detached	56.3%
Large apartment buildings	8.0%
Mobile homes	0.0%
Median rooms	5.9
Avg household size (owned)	2.49

Year built

Era	%
2020 or later	0.4%
2010–2019	10.0%
2000–2009	13.7%
1990–1999	14.2%
1980–1989	18.6%
1970–1979	6.8%
1960–1969	7.2%
1950–1959	12.1%
1940–1949	3.8%
1939 or earlier	13.2%

Bedrooms

Size	% of units
No bedroom (studio)	1.7%
1 bedroom	7.5%
2 bedrooms	39.6%
3 bedrooms	28.9%
4 bedrooms	20.3%
5+ bedrooms	2.1%

Vehicles per household

Vehicles	% of households
No vehicle	4.8%
1 vehicle	34.8%
2 vehicles	45.4%
3 or more	15.0%

Heating fuel

Fuel type	%
Utility gas	62.1%
Electricity	10.7%
Propane / LP gas	4.0%
Fuel oil	22.0%
Wood	0.4%
Solar	0.3%
No fuel used	0.4%

Households & families

Household type	Count	%
Married-couple family	4,265	55.7%
Cohabiting couple	712	9.3%
Male householder, no spouse	961	12.6%
Female householder, no spouse	1,715	22.4%
Households with children under 18	2,302	30.1%
Households with seniors (65+)	2,342	30.6%
Average household size	2.42

Marital status

Status	Male	Female
Never married	31.4%	25.6%
Married	60.3%	52.9%
Separated	1.7%	1.6%
Widowed	0.9%	9.4%
Divorced	5.7%	10.5%

Education

Less than 9th grade 1.1%

Some HS, no diploma 1.5%

HS graduate 14.1%

Some college, no degree 16.5%

Associate's degree 5.5%

Bachelor's degree 32.2%

Graduate / professional 29.0%

Metric	%
HS diploma or higher	97.4%
Bachelor's or higher	61.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	289	7.7%
Kindergarten	248	6.6%
Elementary school	1,711	45.5%
High school	740	19.7%
College / grad school	769	20.5%

Employment

Industry of employment

Education & healthcare 25.7%

Professional & management 19.9%

Manufacturing 12.0%

Retail trade 8.6%

Finance & real estate 7.7%

Construction 6.5%

Transportation & utilities 4.6%

Other services 3.8%

Information 3.4%

Public administration 3.4%

Arts, food & hospitality 2.4%

Wholesale trade 2.0%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	62.9%
Service	9.1%
Sales & office	14.5%
Natural resources & construction	3.7%
Production & transportation	9.8%

Employment type

Type	%
Private sector	83.3%
Government	10.8%
Self-employed	5.8%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	66.8%
Carpool	6.4%
Public transit	5.4%
Walk	2.9%
Work from home	17.7%
Other means	0.8%
Avg commute (minutes)	34.6

Poverty

All people 4.2%

Under 18 years 2.3%

18 and over 4.6%

Married-couple families 1.2%

Female-led households 16.9%

Income support

Source	% of households
Social Security	26.5%
Retirement income	22.2%
Supplemental Security	2.5%
Cash public assistance	2.2%
Food stamps / SNAP	6.7%

Health indicators

Condition	%
Obesity	21.2%
High blood pressure	25.2%
High cholesterol	28.8%
Diabetes	6.7%
Heart disease	4.3%
Stroke	2.0%
Asthma	9.6%
Arthritis	19.7%
Kidney disease	2.1%
Pulmonary disease	3.9%
Cancer	6.5%

Behavior / access	%
Smoking	9.7%
Binge drinking	16.8%
No physical activity	14.5%
Less than 7 hrs sleep	28.1%
Depression	17.4%
Fair or poor health	7.6%
Poor mental health	12.0%
Poor physical health	6.7%
No health insurance	4.8%
Visited doctor (checkup)	75.8%
Visited dentist	77.6%
Cholesterol screening	92.8%
Teeth loss	7.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	589	3.9%

Disability	%
Any disability	8.8%
Under 18	6.8%
18–64 years	5.1%
65 and over	25.3%

Health insurance coverage

Type	%
Private insurance	83.6%
Public insurance	28.3%
No insurance	2.0%
Uninsured under 19	3.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	17,780	95.4%
Spanish	1,576	8.9%
Other Indo-European	428	2.4%
Asian & Pacific Islander	713	4.0%
Other languages	413	2.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	14,553	78.1%
Born in same state	13,889	74.5%
Born in different state	10,047	53.9%
Foreign born	664	3.6%
Naturalized citizen	4,081	21.9%
Not a US citizen	2,142	52.5%

Ancestry

Ancestry	Count	%
Italian	3,159	17%
French	1,705	9.1%
Arab	651	3.5%
German	285	1.5%
Norwegian	224	1.2%

Ancestry	Count	%
English	112	0.6%
Polish	51	0.3%
Irish	25	0.1%
Dutch	14	0.1%

Technology access

Metric	% of households
Computer access	41.1%
Internet access	96.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 01721

What city is ZIP code 01721 in?

ZIP code 01721 is primarily assigned to Ashland, Massachusetts.

What county is ZIP code 01721 in?

ZIP code 01721 falls within Middlesex County, Massachusetts.

How educated is the population of ZIP code 01721?

61% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 01721?

The median household income in ZIP code 01721 is $124,311, above the national median of ~$75,000.

What is the typical home value in ZIP code 01721?

The median home value in ZIP code 01721 is $532,000.

What is the population of ZIP code 01721?

ZIP code 01721 has an estimated population of 18,634 residents, with a density of 1,510 people per square mile.

What timezone is ZIP code 01721 in?

ZIP code 01721 observes the EST timezone.