Marlborough, Massachusetts Population 2021

39,359
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Marlborough is a city located in Middlesex County Massachusetts. With a 2020 population of 39,359, it is the 36th largest city in Massachusetts and the 1001st largest city in the United States . Marlborough is currently declining at a rate of -0.30% annually but its population has increased by 2.23% since the most recent census, which recorded a population of 38,499 in 2010. Marlborough reached it's highest population of 39,797 in 2015. Spanning over 22 miles, Marlborough has a population density of 1,887 people per square mile.

The average household income in Marlborough is $102,739 with a poverty rate of 5.64%. The median rental costs in recent years comes to $1,482 per month, and the median house value is $348,500. The median age in Marlborough is 39.8 years, 38.8 years for males, and 41.1 years for females.

Marlborough Demographics

According to the most recent ACS, the racial composition of Marlborough was:

  • White: 75.21%
  • Other race: 11.14%
  • Asian: 5.46%
  • Two or more races: 4.13%
  • Black or African American: 3.84%
  • Native Hawaiian or Pacific Islander: 0.12%
  • Native American: 0.10%
The current population of Marlborough, Massachusetts is 39,359 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 39,716.The last official US Census in 2010 recorded the population at 38,499.

Marlborough, Massachusetts Population 2021

Population by Race

Race Population Percentage
White29,88775.21%
Some Other Race4,42611.14%
Asian2,1695.46%
Two or More Races1,6414.13%
Black or African American1,5253.84%
Native Hawaiian and Other Pacific Islander490.12%
American Indian and Alaska Native390.10%
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Marlborough Population by Race

Marlborough Population Pyramid $2021

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Marlborough Median Age

39.8


Total

38.8


Male

41.1


Female

Marlborough Adults

There are 31,574 adults, (5,655 of whom are seniors) in Marlborough.

Marlborough Age Dependency

53.3

Age Dependency Ratio

21.8

Old Age Dependency Ratio

31.5

Child Dependency Ratio

Marlborough Sex Ratio

Female

20,479

51.54%

Male

19,257

48.46%

Marlborough Population by Age

Marlborough Renter vs Owner Occupied by Household Type

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Marlborough Household Types

Type Owner Renter
Married72.7%27.3%
All58.2%41.8%
Female46.5%53.5%
Non Family44.6%55.4%
Male43.6%56.4%

58.2%

Rate of Home Ownership

Marlborough Households and Families

Type Count Average Size Owned
All15,7302.4958.2
Married7,4853.2572.7
Non Family5,8391.3144.6
Female1,8142.9446.5
Male5923.1843.6

3.11

Average Family Size

2.49

Average Household Size

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Marlborough Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1,3084.61%
9th to 12th Grade9773.44%
High School Graduate7,97328.08%
Some College4,71016.59%
Associates Degree2,3428.25%
Bachelors Degree6,30422.20%
Graduate Degree4,78116.84%
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Marlborough Educational Attainment by Sex (over 25)

Marlborough Educational Attainment by Race

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Race Total High School Bachelors
White20,53519,6518,606
Hispanic3,6962,649599
Other Race3,0542,261359
Asian1,6221,5301,260
Black890780425
2+ Races756598141
Native American262611

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 77.68%.

Marlborough Educational Attainment by Race

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Name Average Male Female
Overall$49,786$54,738$42,537
Less Than 9th Grade$24,682$39,816$15,988
High School Graduate$33,750$42,969$25,783
Some College$42,352$50,855$38,555
Bachelors Degree$67,708$77,813$59,801
Graduate Degree$88,043$119,487$75,951

$49,786

Average Earnings

$54,738

Average Male

$42,537

Average Female

Marlborough Earnings by Educational Attainment

Marlborough Language by Age

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Marlborough Language

64.07% of Marlborough residents speak only English, while 35.93% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 18.38% of the population.

Marlborough Language

Marlborough Poverty by Race

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Name Total In Poverty Poverty Rate
White27,1461,4925.50%
Hispanic5,9495949.98%
Other4,4263086.96%
Multiple1,6401006.10%
Islander4949100.00%
Black1,486362.42%
Asian2,161321.48%

5.64%

Overall Poverty Rate

4.09%

Male Poverty Rate

7.10%

Female Poverty Rate

Poverty in Marlborough

The race most likely to be in poverty in Marlborough is Islander, with 100.00% below the poverty level.

The race least likely to be in poverty in Marlborough is Asian, with 1.48% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.20%. Among those working part-time, it was 8.09%, and for those that did not work, the poverty rate was 11.46%.

Marlborough Poverty

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Name Poverty
Less Than 9th Grade8.76%
Some College7.32%
High School5.91%
Bachelors or Greater1.59%

Marlborough Poverty Rate by Education

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Rate Poverty
Female Unemployed21.32%
Male Unemployed8.85%
Female Employed5.83%
Male Employed1.51%

Marlborough Poverty Rate by Employment Status and Sex

Marlborough Income by Household Type

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Name Median Mean
Households$80,943$102,739
Families$100,813$118,123
Married Families$111,453-
Non Families$52,050$72,511
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Income by Household Type

Marlborough Marital Status

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Marriage Rates

49.2%

Overall Marriage Rate

52.2%

Male Marriage Rate

46.5%

Female Marriage Rate

Marlborough Married by Age and Sex

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Marlborough Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Marlborough Marital Status by Race

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Marlborough Marital Status

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1,819

Number of Veterans

1,734

Male Veterans

85

Female Veterans

War Veterans
Vietnam558
First Gulf War417
Second Gulf War315
World War II151
Korea149

Marlborough Veterans by War

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Age Group Veterans
75+538
35 to 54485
65 to 74437
55 to 64203
18 to 34156

Marlborough Veterans by Age

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Name Veterans % of Total
White1,7397.12%
Hispanic1483.57%
Other Race401.20%
Black262.56%
2+ Races141.46%

Marlborough Veterans by Race

Marlborough Veterans by Education

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5.19%

Veteran Poverty Rate

19.63%

Veteran Disability Rate

Marlborough Veterans by Education

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74.2%

Labor Force Participation

71.2%

Employment Rate

4%

Unemployment Rate

Marlborough Employment by Age

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Marlborough Employment by Race

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Marlborough Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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54.90%

Born in Marlborough

72.43%

Native Born

27.57%

Foreign Born

16.39%

Non Citizen

11.18%

Naturalized

Place of Birth

72.43% of Marlborough residents were born in the United States, with 54.90% having been born in Massachusetts. 16.39% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Marlborough Place of Birth

Year Population Growth Annual Growth Rate
202139,359-119-0.30%
202039,478-119-0.30%
201939,597-119-0.30%
201839,716-75-0.19%
201739,79190.02%
201639,782-15-0.04%
201539,7971060.27%
201439,6912230.57%
201339,4681610.41%
201239,3073670.94%
201138,9403570.93%
201038,5832,3280.62%
200036,2554,4421.32%
199031,8131,1960.38%
198030,6172,6810.92%
197027,9369,1174.03%
196018,8193,0631.79%
195015,7566020.39%
194015,154-433-0.28%
193015,5875590.37%
192015,0284490.30%
191014,5799700.69%
190013,609-196-0.14%
189013,8053,6783.15%
188010,1271,6531.80%
18708,4742,5633.67%
18605,9110.00%

Marlborough Population by Year