ZIP Code Tabulation Area

21771

Mount Airy, MD · ACS 2020–2024

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Latest estimates

At a glance

U.S. Census Bureau American Community Survey 5-year estimates.

Total population
33,031
Median household income
$157,302
People below poverty
3.1%
Median home value
$556,200

Income

The median income of households in 21771 was $157,302. An estimated 2.3% of households had income below $10,000 a year and 34.2% had income of $200,000 or more.

Household Income in 21771 in 2020-2024

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Percent
Less than $10,000 2.3
$10,000 to $14,999 0.6
$15,000 to $24,999 1.8
$25,000 to $34,999 2.1
$35,000 to $49,999 3.7
$50,000 to $74,999 7.4
$75,000 to $99,999 10.6
$100,000 to $149,999 18
$150,000 to $199,999 19.3
$200,000 or more 34.2

Median Earnings for Full-Time Year-Round Workers by Sex in 21771 in 2020-2024

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Dollars
Male 107375
Female 85882

An estimated 86.2% of households received earnings. An estimated 27.9% of households received Social Security and an estimated 27.9 % of households received retirement income other than Social Security. The average income from Social Security was $27,727. These income sources are not mutually exclusive; that is, some households received income from more than one source.

Proportion of Households with Various Income Sources in 21771 in 2020-2024

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Percent
Earnings 86.2
Social Security 27.9
Retirement income 27.9
Supplemental Security Income (SSI) 1.8
Cash public assistance income 1.6

Poverty and Participation in Government Programs

In 2020-2024, 3.1 % of people were in poverty. An estimated 2.2% of children under 18 were below the poverty level, compared with 5.2% of people 65 years old and over. An estimated 3% of people 18 to 64 years were below the poverty level.

Poverty Rates in 21771 in 2020-2024

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Percent
People in poverty 3.1
Children under 18 years below poverty 2.2
People 65 years old and over below poverty 5.2
People 18 to 64 years below poverty 3

In 2020-2024, 3.8 % of households received SNAP (the Supplemental Nutrition Assistance Program). An estimated 39.6% of households that received SNAP had children under 18, and 65.1% of households that received SNAP had one or more people 60 years and over. An estimated 20.4% of all households receiving SNAP were families with a female householder and no spouse present.


Among the civilian noninstitutionalized population in 21771 in 2020-2024, 96.9% had health insurance coverage and 3.1% did not have health insurance coverage. Private coverage was 88.8% and public coverage was 20.8%, respectively. The percentage of children under the age of 19 with no health insurance coverage was 1.7%.


In 2020-2024, 21771 had a total population of 33,031 - 16,310 (49.4%) females and 16,721 (50.6%) males. The median age was 40.9 years. An estimated 24.2% of the population was under 18 years, 28.1% was 19 to 44 years, 30.1% was 45 to 64 years, and 15.6 % was 65 years and older.

Population by Age and Sex for 21771 in 2020-2024

Male Female
Under 5 1099 1077
5 to 9 1475 1179
10 to 14 1024 793
15 to 19 1271 739
20 to 24 691 1038
25 to 29 777 847
30 to 34 835 797
35 to 39 1131 1182
40 to 44 1029 961
45 to 49 875 820
50 to 54 1344 1323
55 to 59 1432 1690
60 to 64 1326 1107
65 to 69 950 895
70 to 74 714 559
75 to 79 415 549
80 to 84 219 450
85 and over 114 304

Hispanic Origin and Race

For people reporting one race alone, 84.8% were White; 3.6% were Black or African American; 10.3% were American Indian and Alaska Native; 1.4% were Asian; 2.3% were Native Hawaiian and Other Pacific Islander, and 0% were Some Other Race. An estimated 6% reported Two or More Races. An estimated 8.3% of the people in 21771 were Hispanic or Latino. An estimated 83.2% of the people in 21771 were White alone, non-Hispanic. People of Hispanic origin may be of any race.


Households and Families

In 2020-2024, there were 11,226 households in 21771. The average household size was 2.93 people.

Married-couple households made up 68.9% of the households in 21771 while cohabiting couple households made up 5.6% of households. Female householders with no spouse or partner present were 15.6% of all households, while 9.9% of households had male householders with no spouse or partner present. Some households had one person, as 6.8% of households were male householders living alone, and 8.7% were female householders living alone, for a total of 15.5% of all households.

In 21771, 35.1% of all households had one or more people under the age of 18; 32.3% of all households had one or more people 65 years and over.

Types of Households in 21771 in 2020-2024

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Percent
Married-couple households 68.9
Cohabiting Couples 5.6
Male Householder
No spouse/partner present
9.9
Female Householder
No spouse/partner present
15.6

Marital Status

Among persons 15 and older, 63.2% of males and 59.1% of females were currently married.

Population 15 years and over Percent
Males
Percent
Females
Never married 27.2 21.5
Now married, except separated 63.2 59.1
Separated 0.5 0.6
Widowed 2.4 7.6
Divorced 6.7 11.2

Grandparents and Grandchildren

In 21771, 343 grandparents lived with their grandchildren under 18 years old. Of those grandparents, 14% were responsible for the basic needs of their grandchildren.


Nativity and Foreign-Born

In 2020-2024, an estimated 91.6% of the people living in 21771 were U.S. natives. 56.5% of the 21771 population were living in the state where they were born.

Approximately 8.4% of 21771 residents in 2020-2024 were foreign-born. 59.4% of foreign-born were naturalized U.S. citizens and an estimated 74.8 % entered the country before the year 2010.

Foreign-born residents of 21771 come from different parts of the world. The bar graph below displays the percentage of foreign-born from each world region of birth in 2020-2024 for 21771.

Region of Birth for the Foreign-Born Population in 21771 in 2020-2024

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Percent
Latin America 51.2
Asia 22.7
Europe 14.5
Africa 9.2
Northern America 1.7
Oceania 0.8

Language

Among people at least five years old living in 21771 in 2020-2024, 10.9 % spoke a language other than English at home. Spanish was spoken by 6.4% of people at least five years old; 3.8% reported that they did not speak English "very well."

Percentage of the Population 5 years and over who Speak a Language other than English in 21771 in 2020-2024

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Percent
Spanish 6.4
Other Indo-European languages 1.8
Asian and Pacific Islander languages 0.7
Other languages 2

Geographic Mobility

In 2020-2024, 90.3 % of the people at least one year old living in 21771 were living in the same house one year earlier.

Geographic Mobility of Residents of 21771 in 2020-2024

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Percent
Same house 90.3
Different house, same county 1.8
Different county, same state 5.5
Different state 1.8
Abroad 0.6

Education

In 2020-2024, 95.9 % of people 25 years and over had at least graduated from high school and 48.8% had a bachelor's degree or higher. An estimated 4.1% did not complete high school.

The total school enrollment in 21771 was 8,020 in 2020-2024. Nursery school enrollment was 695 and kindergarten through 12th grade enrollment was 5,400. College or graduate school enrollment was 1,925.

Educational Attainment of People in 21771 in 2020-2024

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Percent
Less than high school diploma 4.1
High school diploma or equivalency 20.5
Some college, no degree 18.6
Associate's degree 8.1
Bachelor's degree 28.3
Graduate or professional degree 20.5

Disability

In 21771, among the civilian noninstitutionalized population in 2020-2024, 10.2 % reported a disability. The likelihood of having a disability varied by age - from 4.9% of people under 18 years old, to 8.2% of people 18 to 64 years old, and to 26.8% of those 65 and over.


Employment Status and Type of Employer

In 21771, 68.7 % of the population 16 and over were employed; 27.9% were not currently in the labor force.

An estimated 70.5% of the people employed were private wage and salary workers; 23.9% were federal, state, or local government workers; and 5.2 % were self-employed in their own (not incorporated) business.

Class of worker Number Percent
Private wage and salary workers 12,654 70.5
Federal, state, or local government workers 4,286 23.9
Self-employed workers in own not incorporated business 933 5.2

Industries

In 2020-2024, the civilian employed population 16 years and older in 21771 worked in the following industries:

Percent by Industry in 21771 in 2020-2024

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Percent
Agriculture, forestry, fishing and hunting, and mining 0.8
Construction 10.6
Manufacturing 6.3
Wholesale trade 1.5
Retail trade 9.8
Transportation and warehousing, and utilities 3.3
Information 1.6
Finance and insurance, and real estate and rental and leasing 6
Professional, scientific, and management, and administrative and waste management services 19.1
Educational services, and health care and social assistance 17.7
Arts, entertainment, and recreation, and accommodation, and food services 7.3
Other Services, except public administration 4
Public administration 12.2

Occupations

Occupations for the Civilian Employed Population 16 Years and over in 21771 in 2020-2024

Civilian employed population 16 years and over Number Percent
Management, business, sciences, and arts occupations 9,148 51
Service occupations 2,842 15.8
Sales and office occupations 3,071 17.1
Natural resources, construction, and maintenance occupations 1,670 9.3
Production, transportation, and material moving occupations 1,212 6.8

Commuting to Work

An estimated 70.3% of 21771 workers drove to work alone in 2020-2024, and 6.6% carpooled. Among those who commuted to work, it took them on average 36.1 minutes to get to work.

Percent of Workers 16 and over Commuting by Mode in 21771 in 2020-2024

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Percent
Car, truck, van -- drove alone 70.3
Car, truck, van -- carpooled 6.6
Public transportation (excluding taxicab) 0.5
Walked 0.8
Other means 0.5
Worked from home 21.4

In 2020-2024, 21771 had a total of 11,758 housing units. Of these housing units, 97.7% were single-family houses either not attached to any other structure or attached to one or more structures (commonly referred to as "townhouses" or "row houses"). 0.9% of the housing units were located in multi-unit structures, or those buildings that contained two or more apartments. 1.2% were mobile homes, while any remaining housing units were classified as "other," which included boats, recreational vehicles, vans, etc.

Types of Housing Units in 21771 in 2020-2024

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Percent
Single-family houses 97.7
Apartments in multi-unit structures 0.9
Mobile homes 1.2
Boat, RV, van, etc 0.1

6.3% of the housing inventory was comprised of houses built since 2010, while 7.9% of the houses were first built in 1939 or earlier. The median number of rooms in all housing units in 21771 was 8.2 rooms, and of these housing units 92.1% had three or more bedrooms.


In 2020-2024, 21771 had 11,226 housing units that were occupied or had people living in them, while the remaining 532 were vacant. Of the occupied housing units, the percentage of these houses occupied by owners (also known as the homeownership rate) was 94% while renters occupied 6%. The average household size of owner-occupied houses was 2.94 and in renter-occupied houses it was 2.79.

1.9% of householders of these occupied houses had moved into their house since 2021, while 12.8% moved into their house in 1989 or earlier. Households without a vehicle available for personal use comprised 1.9% and another 43.5% had three or more vehicles available for use.

The following chart provides the primary fuel used to heat houses in 21771:

House Heating Fuel Used in 21771 in 2020-2024

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Percent
Gas 29.3
Electricity 54.2
Fuel oil, kerosene, etc 12.7
All other fuels 3.2
No fuel used 0.5

In 2020-2024, the median property value for owner-occupied houses in 21771 was $556,200.

Of the owner-occupied households, 73.3 % had a mortgage. 26.7% owned their houses "free and clear," that is without a primary mortgage or loan on the house. The median monthly housing costs for owners with a mortgage was $2,724 and for owners without a mortgage it was $725.

For renter-occupied houses, the median gross rent for 21771 was $2,252. Gross rent includes the monthly contract rent and any monthly payments made for electricity, gas, water and sewer, and any other fuels to heat the house.