Mount Airy ZIP Code List — Frederick County, MD

There is one unique ZIP code in Mount Airy, Maryland and it is 21771. Area code: 240/301.

ZIP codes

89.52

sq mi land

0.18

sq mi water

240/301

area code

Mount Airy, MD ZIP code map

About Mount Airy, MD

Mount Airy, Maryland, is a charming town located in Frederick County. Known for its small-town atmosphere, Mount Airy offers a blend of rural and suburban living. With a range of community events and local businesses, residents enjoy a tight-knit lifestyle while still being close to larger urban centers.

Location & geography

Geographically, Mount Airy is positioned approximately halfway between Baltimore and Washington, D.C., making it a convenient location for commuters. The town is surrounded by beautiful landscapes, covering a total land area of 89.52 square miles and a minimal water area of 0.18 square miles. Nearby cities include Westminster, located about 16 miles to the north, and the bustling city of Frederick, which is around 20 miles to the northwest.

Community & economy

The community of Mount Airy is known for its friendly residents and an array of local amenities that enhance daily life. The town's economy is bolstered by industries such as retail, education, and healthcare, providing a stable environment for residents. Frequent community events and festivals foster a strong sense of togetherness and pride among the townspeople.

Transportation

Transportation in Mount Airy includes easy access to major highways such as Route 27 and Interstate 70, facilitating travel to surrounding areas. The nearest named airport is Baltimore/Washington International Thurgood Marshall Airport, located approximately 35 miles away. Public transit options are limited, making personal vehicles the primary mode of transportation for most residents.

History

Mount Airy was established in the early 19th century and originally served as a farming community. Over the years, it has developed into a small-town hub, maintaining its agricultural roots while welcoming new industries and residents. Notable events in its history include the construction of important railway lines that enhanced connectivity with other regions.

Did you know?

One surprising fact about Mount Airy is that it has traditionally been a meeting point for various cultural and community events, attracting visitors from neighboring areas. Additionally, it is known for its picturesque landscapes, featuring rolling hills and scenic views that represent the beauty of rural Maryland.

ZIP codes for Mount Airy, MD (1)

ZIP code	City	County	Map
21771	Mount Airy	Frederick	View map

Demographics & statistics

31,653

Population

41.6

Median age

$148,909

Median household income

$55,576

Per capita income

$501,800

Median home value

$1,713

Median monthly rent

92.8%

Home ownership

3.2%

Poverty rate

3.3%

Unemployment

10,237

Housing units

46.0%

Bachelor's or higher

Age distribution

Male Female

978

Under 5

924

1,317

5–9

1,243

893

10–14

843

1,082

15–19

1,022

927

20–24

875

1,501

25–34

1,417

2,070

35–44

1,955

2,463

45–54

2,325

1,505

55–59

1,421

1,082

60–64

1,022

1,501

65–74

1,418

776

75–84

732

186

85+

175

← Male

Female →

Age summary

Group	Count	%
Under 18	7,534	23.8%
18 and over	24,119	76.2%
65 and over	4,788	15.1%
Median age	41.6 years

Race & ethnicity

White 83.8%

Two or more races 4.5%

Black or African American 4.1%

Hispanic or Latino 3.8%

Asian 1.9%

Other race 1.8%

American Indian / Alaska Native 0.1%

Group	Count	%
White	27,569	83.8%
Two or more races	1,483	4.5%
Black or African American	1,350	4.1%
Hispanic or Latino	1,245	3.8%
Asian	614	1.9%
Other race	605	1.8%
American Indian / Alaska Native	18	0.1%

Household income

Under $10k 2.3%

$10k–$15k 0.5%

$15k–$25k 2.5%

$25k–$35k 2.9%

$35k–$50k 4.2%

$50k–$75k 8.8%

$75k–$100k 8.1%

$100k–$150k 21.5%

$150k–$200k 19.0%

$200k+ 30.3%

Range	% of households
Under $10k	2.3%
$10k–$15k	0.5%
$15k–$25k	2.5%
$25k–$35k	2.9%
$35k–$50k	4.2%
$50k–$75k	8.8%
$75k–$100k	8.1%
$100k–$150k	21.5%
$150k–$200k	19.0%
$200k+	30.3%
Median income	$148,909

Housing

Home values

Under $50k 1.7%

$50k–$100k 0.8%

$100k–$150k 0.2%

$150k–$200k 0.6%

$200k–$300k 6.4%

$300k–$500k 40.0%

$500k–$1M 48.6%

$1M+ 1.7%

Housing overview

Metric	Value
Median home value	$501,800
Median rent / month	$1,713
Owner occupied	92.8%
Renter occupied	7.2%
Vacant	3.9%
Single-family detached	86.0%
Large apartment buildings	0.6%
Mobile homes	2.1%
Median rooms	8.1
Avg household size (owned)	3.00

Year built

Era	%
2020 or later	0.6%
2010–2019	3.7%
2000–2009	18.0%
1990–1999	22.1%
1980–1989	20.5%
1970–1979	18.3%
1960–1969	5.6%
1950–1959	3.0%
1940–1949	1.4%
1939 or earlier	6.8%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	0.8%
2 bedrooms	8.4%
3 bedrooms	35.5%
4 bedrooms	41.9%
5+ bedrooms	12.4%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	13.3%
2 vehicles	40.3%
3 or more	44.0%

Heating fuel

Fuel type	%
Utility gas	24.0%
Electricity	51.1%
Propane / LP gas	4.9%
Fuel oil	14.8%
Wood	2.3%
Solar	0.3%
No fuel used	0.9%

Households & families

Household type	Count	%
Married-couple family	7,550	71.4%
Cohabiting couple	360	3.4%
Male householder, no spouse	1,193	11.3%
Female householder, no spouse	1,467	13.9%
Households with children under 18	3,589	34.0%
Households with seniors (65+)	3,216	30.4%
Average household size	2.98

Marital status

Status	Male	Female
Never married	27.6%	22.0%
Married	63.2%	61.4%
Separated	0.9%	0.5%
Widowed	2.4%	6.2%
Divorced	5.9%	9.9%

Education

Less than 9th grade 2.3%

Some HS, no diploma 2.8%

HS graduate 22.6%

Some college, no degree 17.3%

Associate's degree 9.0%

Bachelor's degree 26.6%

Graduate / professional 19.4%

Metric	%
HS diploma or higher	94.9%
Bachelor's or higher	46.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	576	7.3%
Kindergarten	427	5.4%
Elementary school	3,231	40.8%
High school	1,578	19.9%
College / grad school	2,110	26.6%

Employment

Industry of employment

Education & healthcare 18.8%

Professional & management 18.7%

Public administration 12.0%

Retail trade 9.7%

Construction 9.0%

Arts, food & hospitality 7.7%

Manufacturing 7.3%

Other services 5.0%

Finance & real estate 4.4%

Transportation & utilities 3.3%

Wholesale trade 2.0%

Information 1.2%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	50.9%
Service	14.9%
Sales & office	17.8%
Natural resources & construction	7.3%
Production & transportation	9.1%

Employment type

Type	%
Private sector	69.5%
Government	23.5%
Self-employed	6.6%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	76.4%
Carpool	6.2%
Public transit	0.4%
Walk	0.6%
Other means	0.4%
Avg commute (minutes)	36.2

Poverty

All people 3.2%

Under 18 years 3.4%

18 and over 3.2%

Married-couple families 1.0%

Female-led households 8.5%

Income support

Source	% of households
Social Security	27.1%
Retirement income	26.1%
Supplemental Security	1.8%
Cash public assistance	2.2%
Food stamps / SNAP	3.3%

Health indicators

Condition	%
High blood pressure	30.2%
High cholesterol	34.0%
Heart disease	4.8%
Stroke	2.2%
Asthma	9.2%
Arthritis	22.3%
Kidney disease	2.3%
Pulmonary disease	4.9%
Cancer	6.6%

Behavior / access	%
Binge drinking	16.8%
No physical activity	17.0%
Less than 7 hrs sleep	29.1%
Fair or poor health	9.1%
Poor mental health	12.9%
Poor physical health	7.3%
No health insurance	7.8%
Visited doctor (checkup)	75.7%
Visited dentist	72.3%
Cholesterol screening	93.2%
Teeth loss	7.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,843	7.7%

Disability	%
Any disability	10.0%
Under 18	4.6%
18–64 years	7.7%
65 and over	28.4%

Health insurance coverage

Type	%
Private insurance	88.9%
Public insurance	21.2%
Uninsured under 19	1.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	29,751	94.0%
Spanish	953	3.2%
Other Indo-European	454	1.5%
Asian & Pacific Islander	174	0.6%
Other languages	125	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	29,396	92.9%
Born in same state	28,978	91.5%
Born in different state	17,751	56.1%
Foreign born	418	1.3%
Naturalized citizen	2,257	7.1%
Not a US citizen	1,373	60.8%

Ancestry

Ancestry	Count	%
Italian	6,962	22%
French	5,190	16.4%
Arab	2,049	6.5%
Polish	226	0.7%
Irish	220	0.7%

Ancestry	Count	%
English	198	0.6%
Norwegian	114	0.4%
German	113	0.4%
Dutch	28	0.1%

Technology access

Metric	% of households
Computer access	33.4%
Internet access	95.6%

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

Frequently asked questions

What is the ZIP code for Mount Airy, MD?

Mount Airy, MD has one ZIP code: 21771.

What is the main ZIP code for Mount Airy, MD?

The primary ZIP code for Mount Airy, MD is 21771. The city uses area code 240 or 301 for phone service.

What county is Mount Airy, MD in?

Mount Airy is located in Frederick County, Maryland.

How many ZIP codes are in Mount Airy, MD?

Mount Airy, MD has 1 ZIP code.

What ZIP code covers downtown Mount Airy and the historic Main Street area?

Downtown Mount Airy and the historic Main Street area are located in ZIP code 21771, which serves as the primary commercial and civic center of the city.

If I'm sending mail to a residential address in Mount Airy near the Mount Airy library, what ZIP code should I use?

Addresses near the Mount Airy library and throughout the residential areas of Mount Airy should use ZIP code 21771, which covers the entire city.