20818

Zip code 20818: Cabin John, Maryland

Q: What city is zip code 20818?

20818 is assigned to Cabin John, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 20818 in?

20818 is in Montgomery County, Maryland.

Q: What is the population of 20818?

About 1,539 people live in 20818, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 20818?

The median household income in 20818 is $245,982.

Q: What zip codes are near 20818?

The closest zip codes to 20818 are 20812, 20817, 22101, 20816, 22106.

Residential delivery areaMontgomery CountyEastern Time

Population

1,539

Median household income

$246K

U.S. $81K

Median home value

$1.3M

U.S. $333K

Median rent

—

U.S. $1,413

Median age

52.7

U.S. 38.9

Land area

0.9 sq mi

1,658 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 20818

20818 is a suburban zip code in Cabin John, Maryland (Montgomery County), covering 0.9 sq mi of land. About 1,539 people live here, or 1,658 per square mile. The median resident is 52.7 years old, compared with 38.9 nationally.

The median household earns $245,982 a year, about 3.0× the national median of $80,734. 1.1% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $1,335,100, or 5.4 years of median household income (U.S.: 4.1 years), which makes homes relatively expensive for local earners. 95% of occupied homes are lived in by their owners.

86% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 30.1 minutes each way, and 44% of workers work from home; working from home is more common than any single way of commuting. The most common jobs among working residents are in management; engineering and science; and education. 19% of them are self-employed (U.S.: 10%). 30% of households speak a language other than English at home, most often another Indo-European language such as French, German, Russian or Hindi.

How 20818 compares

Sorted from highest to lowest national percentile

Median household income$245,982
99th
StrengthU.S. $80,734 · MD $103,6789th of 414 in MD
Per capita income$159,058
99th
StrengthU.S. $44,673 · MD $52,9792nd of 446 in MD
Bachelor's degree or higher86.4%
99th
StrengthU.S. 35.7% · MD 43.4%5th of 445 in MD
Homeownership rate95.3%
99th
StrengthU.S. 65.2% · MD 67.6%62nd of 441 in MD
Work from home43.9%
99th
U.S. 15.1% · MD 19.3%11th of 444 in MD
Broadband access100%
99th
StrengthU.S. 91% · MD 92.4%27th of 441 in MD
Median earnings per worker$142,115
99th
StrengthU.S. $49,666 · MD $61,2006th of 443 in MD
Median home value$1,335,100
98th
U.S. $332,700 · MD $419,9002nd of 421 in MD
Median age52.7
97th
U.S. 38.9 · MD 39.458th of 446 in MD
Self-employed workers19.1%
97th
U.S. 10% · MD 8.7%39th of 444 in MD
Government workers24.4%
94th
U.S. 14.5% · MD 22.5%150th of 444 in MD
Tech workers7.7%
93rd
U.S. 3.8% · MD 6.4%101st of 444 in MD
Residents 65 and older23.6%
89th
U.S. 17.2% · MD 16.7%97th of 446 in MD
Income inequality (Gini)0.503
89th
WeaknessU.S. 0.483 · MD 0.45636th of 438 in MD
Average commute30.1 min
74th
U.S. 26.4 min · MD 31.1 min243rd of 421 in MD
Housing vacancy9.7%
70th
U.S. 10.1% · MD 7.7%131st of 441 in MD
Foreign-born residents15.8%
66th
U.S. 14.1% · MD 16.6%92nd of 446 in MD
Diversity index52.4
56th
U.S. 61.4 · MD 67.7159th of 446 in MD
Population density1,658/sq mi
53rd
U.S. 95/sq mi · MD 639/sq mi130th of 446 in MD
Residents under 1821.5%
44th
U.S. 22% · MD 22.2%234th of 446 in MD
Veterans3.6%
21st
U.S. 6.2% · MD 6.8%385th of 446 in MD
Uninsured rate1.6%
3rd
StrengthU.S. 8.4% · MD 6.3%352nd of 444 in MD
Healthcare workers4.7%
3rd
U.S. 9.7% · MD 9%362nd of 444 in MD
Population1,539
2nd
U.S. 334,922,499 · MD 6,206,011326th of 446 in MD
Poverty rate1.1%
1st
StrengthU.S. 12.5% · MD 9.4%404th of 441 in MD
Unemployment rate0%
1st
StrengthU.S. 5.2% · MD 4.9%421st of 444 in MD
Rent-burdened renters0%
1st
StrengthU.S. 51.1% · MD 51.5%384th of 404 in MD

Measure	20818	Montgomery	MD	U.S.	National percentile	Rank in MD
Median household incomeStrength	$245,982	$132,450	$103,678	$80,734	99th	9th of 414
Per capita incomeStrength	$159,058	$67,571	$52,979	$44,673	99th	2nd of 446
Bachelor's degree or higherStrength	86.4%	60.6%	43.4%	35.7%	99th	5th of 445
Homeownership rateStrength	95.3%	65.3%	67.6%	65.2%	99th	62nd of 441
Work from home	43.9%	28.3%	19.3%	15.1%	99th	11th of 444
Broadband accessStrength	100%	95.7%	92.4%	91%	99th	27th of 441
Median earnings per workerStrength	$142,115	$71,294	$61,200	$49,666	99th	6th of 443
Median home value	$1,335,100	$640,300	$419,900	$332,700	98th	2nd of 421
Median age	52.7	40.2	39.4	38.9	97th	58th of 446
Self-employed workers	19.1%	11%	8.7%	10%	97th	39th of 444
Government workers	24.4%	21.5%	22.5%	14.5%	94th	150th of 444
Tech workers	7.7%	8.2%	6.4%	3.8%	93rd	101st of 444
Residents 65 and older	23.6%	17%	16.7%	17.2%	89th	97th of 446
Income inequality (Gini)Weakness	0.503	0.469	0.456	0.483	89th	36th of 438
Average commute	30.1 min	31.9 min	31.1 min	26.4 min	74th	243rd of 421
Housing vacancy	9.7%	4.3%	7.7%	10.1%	70th	131st of 441
Foreign-born residents	15.8%	33.6%	16.6%	14.1%	66th	92nd of 446
Diversity index	52.4	74.1	67.7	61.4	56th	159th of 446
Population density	1,658/sq mi	2,162/sq mi	639/sq mi	95/sq mi	53rd	130th of 446
Residents under 18	21.5%	22.8%	22.2%	22%	44th	234th of 446
Veterans	3.6%	4.2%	6.8%	6.2%	21st	385th of 446
Uninsured rateStrength	1.6%	7%	6.3%	8.4%	3rd	352nd of 444
Healthcare workers	4.7%	8.3%	9%	9.7%	3rd	362nd of 444
Population	1,539	1,065,949	6,206,011	334,922,499	2nd	326th of 446
Poverty rateStrength	1.1%	7.5%	9.4%	12.5%	1st	404th of 441
Unemployment rateStrength	0%	4.9%	4.9%	5.2%	1st	421st of 444
Rent-burdened rentersStrength	0%	51.6%	51.5%	51.1%	1st	384th of 404

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

21%

5–17

18–24

25–34

11%

35–44

16%

45–54

21%

55–64

10%

65–74

14%

75+

Median age

52.7

Under 18

21.5%

65 and over

23.6%

Race and ethnicity

White67%
Black3%
Hispanic5%
Asian11%
Native American0%
Pacific Islander0%
Other3%
Multiracial12%

Diversity index

52.4

U.S. 61.4

Foreign-born

15.8%

U.S. 14.1%

Born in state

15.3%

Language spoken at home (households)

English only

70%

Spanish

Other Indo-European

11%

Asian / Pacific

10%

Other

Households

Households: 593
Average household size: 2.6
Family households: 75.5%
Married couples: 70.3%
Living alone: 17.2%
Veterans (of adults): 3.6%
Male / female: 45% / 55%

Income and poverty

Household income distribution

<$25k

$25–50k

16%

$50–75k

$75–100k

$100–150k

$150–200k

14%

$200k+

62%

Median household income

20818

$245,982

Montgomery Co.

$132,450

Maryland

$103,678

United States

$80,734

Per capita income

$159,058

U.S. $44,673

Poverty rate

1.1%

U.S. 12.5%

Households earning $150K+

76.2%

U.S. 23%

Income inequality (Gini)

0.503

U.S. 0.483

Housing

Median home value

20818

$1,335,100

Montgomery Co.

$640,300

Maryland

$419,900

United States

$332,700

Median gross rent

20818

—

Montgomery Co.

$2,068

Maryland

$1,705

United States

$1,413

Types of housing

Single-family

100%

2–4 units

5–19 units

20+ units

Mobile home

Boat, RV, van

Housing units: 657
Owner-occupied: 95.3%
Vacant: 9.7%
Median year built: 1982
Median rooms: 9 or more
Renters paying 30%+ of income: 0%
Renters paying 50%+ of income: 0%
Home value to income: 5.4× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

43%

Carpooled

Transit

Walked

Bicycle

Worked from home

44%

Other

Commute time (one way)

<10 min

11%

10–19

20%

20–29

23%

30–44

26%

45–59

60+

16%

Average commute

30.1 min

U.S. 26.4 min

Unemployment

U.S. 5.2%

In labor force

68.9%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

31%

Engineering and science

12%

Education

11%

Cleaning and personal care

Computer and math

Arts, media and sports

Business and finance

Healthcare

Transportation and moving

Legal and social services

Sales

Food service

Police and fire

Office and admin

Construction and repair

Farming, fishing and forestry

Production

Industries

Professional and technical services

30%

Public administration

14%

Finance, insurance and real estate

14%

Education

13%

Health care and social assistance

10%

Other services

Retail

Arts and recreation

Manufacturing

Wholesale

Restaurants and hotels

Information

Admin, support and management

Transportation, warehousing and utilities

Construction

Agriculture and mining

Median earnings per worker

$142,115

U.S. $49,666

Self-employed

19.1%

U.S. 10%

Government workers

24.4%

U.S. 14.5%

Nonprofit workers

11.6%

U.S. 8.8%

Median earnings by type of work

Type of work	20818	U.S.
Management, business, science and arts	$182,536	$74,888
Service	$35,667	$26,804
Sales and office	$59,519	$40,476
Construction and maintenance	—	$49,199
Production and transportation	—	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

Some college

Associate's

Bachelor's

21%

Graduate

66%

High school graduate or higher: 98.9%
Bachelor's degree or higher: 86.4%
Graduate or professional degree: 65.6%
Households with broadband: 100%
Cable, fiber or DSL: 91.6%
No internet access: 0%
Without health insurance: 1.6%
Limited-English households: 2.4%

Geography

City (USPS): Cabin John
State: Maryland
County: Montgomery County
Center point: 38.9735° N, 77.1624° W
Land area: 0.9 sq mi
Water area: 0.4 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Cabin John (unincorporated)100% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 20818

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
20812	Glen Echo, MD	1.1 mi	276	$213,750	$1,163,500
20817	Bethesda, MD	1.7 mi	37,454	$249,332	$1,183,600
22101	Mc Lean, VA	2.3 mi	30,953	$250,000+	$1,449,900
20816	Bethesda, MD	2.5 mi	18,140	$232,656	$1,217,200
22106	Mc Lean, VA · PO box	2.9 mi	—	—	—
22109	Mc Lean, VA · PO box	2.9 mi	—	—	—
22107	Mc Lean, VA · PO box	3.1 mi	—	—	—
22108	Mc Lean, VA · PO box	3.1 mi	—	—	—
20810	Bethesda, MD · PO box	3.3 mi	—	—	—
20811	Bethesda, MD · PO box	3.3 mi	—	—	—
20824	Bethesda, MD · PO box	3.4 mi	—	—	—
20894	Bethesda, MD	3.6 mi	0	—	—

Zip codes like 20818 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Washington Crossing, PA

Bainbridge Island, WA

Questions about 20818

What city is zip code 20818?

20818 is assigned to Cabin John, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 20818 in?

20818 is in Montgomery County, Maryland.

What is the population of 20818?

About 1,539 people live in 20818, according to the Census Bureau's American Community Survey.

What time zone is 20818 in?

20818 is in Eastern Time.

What is the median household income in 20818?

The median household income in 20818 is $245,982.

What zip codes are near 20818?

The closest zip codes to 20818 are 20812, 20817, 22101, 20816, 22106.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 20818, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.