Cabin John ZIP Codes — Montgomery County, MD

There is one unique ZIP code in Cabin John, Maryland and it is 20818. Area code: 240/301.

ZIP codes

0.93

sq mi land

0.42

sq mi water

240/301

area code

Cabin John, MD ZIP code map

About Cabin John, MD

Cabin John is a charming residential community located in Maryland. Nestled within Montgomery County, this small town offers a tranquil environment with close-knit neighborhoods. Its unique character and scenic surroundings make it an attractive place for families and professionals alike.

Location & geography

Cabin John, MD occupies a land area of 0.93 square miles and features an additional 0.42 square miles of water. It is situated just a short distance from neighboring towns like Bethesda, which is approximately 5 miles away, and Potomac, about 4 miles away. The terrain is primarily residential, interspersed with natural features, offering a picturesque setting.

Community & economy

The character of Cabin John is defined by its quiet streets and friendly residents, fostering a welcoming community spirit. Most of the local economy is centered around residential living, with some small businesses and proximity to larger commercial areas in nearby towns. Daily life here typically includes family-oriented activities and community events, enhancing the neighborhood's charm.

Transportation

Cabin John is conveniently accessible via major roadways, including the Clara Barton Parkway, which connects to larger highways. The nearest named airports are Ronald Reagan Washington National Airport and Montgomery County Airpark, both catering to various travel needs. Public transit options are available in nearby areas, facilitating commutes to Washington, D.C.

History

Cabin John was originally settled in the 19th century and has since developed into a predominantly residential area. The town is known for its history as a rail stop and its picturesque views along the Cabin John Stream. Over the years, it has preserved its small-town charm while remaining close to the urban conveniences of the surrounding county.

Did you know?

One surprising fact about Cabin John is that it has only one ZIP code, which is 20818. This unique attribute contributes to the community's cohesive identity.

ZIP codes for Cabin John, MD (1)

ZIP code	City	County	Map
20818	Cabin John	Montgomery	View map

Demographics & statistics

1,787

Population

50.5

Median age

$211,196

Median household income

$132,988

Per capita income

$1,093,600

Median home value

Median monthly rent

95.6%

Home ownership

0.1%

Poverty rate

0.0%

Unemployment

729

Housing units

93.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

125

10–14

15–19

20–24

25–34

35–44

134

45–54

143

55–59

60–64

102

103

65–74

148

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	391	21.9%
18 and over	1,396	78.1%
65 and over	454	25.4%
Median age	50.5 years

Race & ethnicity

White 53.1%

Hispanic or Latino 13.8%

Asian 12.2%

Two or more races 11.5%

Other race 4.7%

Black or African American 4.5%

American Indian / Alaska Native 0.1%

Group	Count	%
White	1,102	53.1%
Hispanic or Latino	287	13.8%
Asian	254	12.2%
Two or more races	238	11.5%
Other race	97	4.7%
Black or African American	94	4.5%
American Indian / Alaska Native	2	0.1%

Household income

$15k–$25k 2.5%

$25k–$35k 2.4%

$35k–$50k 11.4%

$50k–$75k 4.8%

$75k–$100k 5.6%

$100k–$150k 2.5%

$150k–$200k 10.2%

$200k+ 60.5%

Range	% of households
$15k–$25k	2.5%
$25k–$35k	2.4%
$35k–$50k	11.4%
$50k–$75k	4.8%
$75k–$100k	5.6%
$100k–$150k	2.5%
$150k–$200k	10.2%
$200k+	60.5%
Median income	$211,196

Housing

Home values

$100k–$150k 1.2%

$200k–$300k 2.7%

$300k–$500k 2.7%

$500k–$1M 33.4%

$1M+ 60.1%

Housing overview

Metric	Value
Median home value	$1,093,600
Median rent / month	$0
Owner occupied	95.6%
Renter occupied	4.4%
Vacant	6.8%
Single-family detached	91.1%
Large apartment buildings	2.4%
Mobile homes	0.0%
Median rooms	8.5
Avg household size (owned)	2.48

Year built

Era	%
2020 or later	0.0%
2010–2019	18.0%
2000–2009	3.2%
1990–1999	3.4%
1980–1989	23.2%
1970–1979	9.6%
1960–1969	13.2%
1950–1959	15.7%
1940–1949	6.8%
1939 or earlier	7.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.4%
2 bedrooms	17.4%
3 bedrooms	27.2%
4 bedrooms	27.8%
5+ bedrooms	25.3%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	28.1%
2 vehicles	48.2%
3 or more	21.3%

Heating fuel

Fuel type	%
Utility gas	35.6%
Electricity	39.4%
Propane / LP gas	9.3%
Fuel oil	15.7%

Households & families

Household type	Count	%
Married-couple family	433	61.2%
Cohabiting couple	18	2.5%
Male householder, no spouse	29	4.1%
Female householder, no spouse	228	32.2%
Households with children under 18	209	29.5%
Households with seniors (65+)	358	50.6%
Average household size	2.52

Marital status

Status	Male	Female
Never married	17.2%	23.2%
Married	77.8%	54.5%
Separated	0.0%	1.1%
Widowed	0.0%	4.2%
Divorced	4.9%	16.9%

Education

Less than 9th grade 0.2%

Some HS, no diploma 0.0%

HS graduate 5.0%

Some college, no degree 1.5%

Associate's degree 0.0%

Bachelor's degree 27.2%

Graduate / professional 66.2%

Metric	%
HS diploma or higher	99.8%
Bachelor's or higher	93.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	46	8.4%
Kindergarten	40	7.3%
Elementary school	226	41.5%
High school	97	17.8%
College / grad school	136	25.0%

Employment

Industry of employment

Education & healthcare 28.8%

Professional & management 25.3%

Finance & real estate 14.8%

Public administration 13.7%

Other services 5.5%

Retail trade 3.7%

Transportation & utilities 1.9%

Manufacturing 1.8%

Information 1.6%

Construction 1.5%

Arts, food & hospitality 1.4%

Occupation

Category	%
Management, business & arts	86.8%
Service	7.6%
Sales & office	3.7%
Natural resources & construction	0.0%
Production & transportation	1.9%

Employment type

Type	%
Private sector	66.7%
Government	24.2%
Self-employed	9.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	61.5%
Carpool	2.7%
Public transit	2.9%
Walk	0.0%
Other means	0.0%
Avg commute (minutes)	31.7

Poverty

All people 0.1%

Under 18 years 0.0%

18 and over 0.1%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.7%
Retirement income	32.9%
Supplemental Security	2.5%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
High blood pressure	27.6%
High cholesterol	36.8%
Heart disease	4.6%
Stroke	1.9%
Asthma	7.5%
Arthritis	19.8%
Kidney disease	2.2%
Pulmonary disease	3.3%
Cancer	7.5%

Behavior / access	%
Binge drinking	12.5%
No physical activity	10.9%
Less than 7 hrs sleep	24.9%
Fair or poor health	6.0%
Poor mental health	9.0%
Poor physical health	5.2%
No health insurance	5.3%
Visited doctor (checkup)	75.1%
Visited dentist	80.3%
Cholesterol screening	96.2%
Teeth loss	3.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	48	3.5%

Disability	%
Any disability	3.8%
Under 18	0.0%
18–64 years	0.9%
65 and over	13.0%

Health insurance coverage

Type	%
Private insurance	84.8%
Public insurance	32.2%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,747	97.8%
Spanish	10	0.6%
Other Indo-European	2	0.1%
Asian & Pacific Islander	0	0.0%
Other languages	8	0.5%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,409	78.8%
Born in same state	1,409	78.8%
Born in different state	294	16.5%
Foreign born	0	0.0%
Naturalized citizen	378	21.2%
Not a US citizen	311	82.3%

Ancestry

Ancestry	Count	%
Italian	313	17.5%
French	210	11.8%
Irish	59	3.3%

Ancestry	Count	%
Norwegian	25	1.4%
English	12	0.7%

Technology access

Metric	% of households
Computer access	39.6%
Internet access	100.0%

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

Frequently asked questions

What ZIP codes does Cabin John, MD have?

Cabin John, MD has one ZIP code: 20818. Each ZIP code serves a distinct delivery area within the city and surrounding region.