20851

Zip code 20851: Rockville, Maryland

Q: What city is zip code 20851?

20851 is assigned to Rockville, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 20851 in?

20851 is in Montgomery County, Maryland.

Q: What is the population of 20851?

About 14,946 people live in 20851, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 20851?

The median household income in 20851 is $126,411.

Q: What zip codes are near 20851?

The closest zip codes to 20851 are 20847, 20849, 20852, 20857, 20883.

Residential delivery areaMontgomery CountyEastern Time

Population

14,946

Median household income

$126K

U.S. $81K

Median home value

$569K

U.S. $333K

Median rent

$2,043/mo

U.S. $1,413

Median age

38.6

U.S. 38.9

Land area

2.5 sq mi

5,894 people/sq mi

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

About 20851

20851 is an urban zip code in Rockville, Maryland (Montgomery County), covering 2.5 sq mi of land. About 14,946 people live here, or 5,894 per square mile. The median resident is 38.6 years old, compared with 38.9 nationally.

The median household earns $126,411 a year, 57% above the national median of $80,734. 9.1% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $568,900, or 4.5 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 58% of occupied homes are lived in by their owners, and renters pay a median of $2,043 a month.

46% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 31.8 minutes each way, and 26% of workers work from home. The most common jobs among working residents are in construction and repair; sales; and cleaning and personal care. 57% of households speak a language other than English at home, most often Spanish.

How 20851 compares

Sorted from highest to lowest national percentile

Foreign-born residents38.5%
94th
U.S. 14.1% · MD 16.6%13th of 446 in MD
Tech workers8.5%
94th
U.S. 3.8% · MD 6.4%87th of 444 in MD
Diversity index69.6
93rd
U.S. 61.4 · MD 67.732nd of 446 in MD
Government workers22.4%
91st
U.S. 14.5% · MD 22.5%193rd of 444 in MD
Work from home25.6%
89th
U.S. 15.1% · MD 19.3%78th of 444 in MD
Median household income$126,411
88th
StrengthU.S. $80,734 · MD $103,678136th of 414 in MD
Population density5,894/sq mi
85th
U.S. 95/sq mi · MD 639/sq mi36th of 446 in MD
Median gross rent$2,043
85th
U.S. $1,413 · MD $1,70577th of 338 in MD
Average commute31.8 min
82nd
WeaknessU.S. 26.4 min · MD 31.1 min198th of 421 in MD
Median home value$568,900
79th
U.S. $332,700 · MD $419,90092nd of 421 in MD
Per capita income$51,567
74th
U.S. $44,673 · MD $52,979227th of 446 in MD
Bachelor's degree or higher46.2%
74th
U.S. 35.7% · MD 43.4%151st of 445 in MD
Uninsured rate10%
71st
U.S. 8.4% · MD 6.3%43rd of 444 in MD
Median earnings per worker$55,625
68th
U.S. $49,666 · MD $61,200260th of 443 in MD
Broadband access92.8%
56th
U.S. 91% · MD 92.4%235th of 441 in MD
Rent-burdened renters50.8%
50th
U.S. 51.1% · MD 51.5%187th of 404 in MD
Median age38.6
47th
U.S. 38.9 · MD 39.4304th of 446 in MD
Poverty rate9.1%
39th
U.S. 12.5% · MD 9.4%157th of 441 in MD
Veterans4.6%
33rd
U.S. 6.2% · MD 6.8%346th of 446 in MD
Residents under 1820%
31st
U.S. 22% · MD 22.2%283rd of 446 in MD
Homeownership rate57.5%
28th
U.S. 65.2% · MD 67.6%375th of 441 in MD
Residents 65 and older13.1%
24th
U.S. 17.2% · MD 16.7%363rd of 446 in MD
Population14,946
23rd
U.S. 334,922,499 · MD 6,206,011152nd of 446 in MD
Self-employed workers7%
19th
U.S. 10% · MD 8.7%303rd of 444 in MD
Income inequality (Gini)0.396
18th
StrengthU.S. 0.483 · MD 0.456249th of 438 in MD
Unemployment rate3%
16th
StrengthU.S. 5.2% · MD 4.9%288th of 444 in MD
Housing vacancy3.4%
15th
U.S. 10.1% · MD 7.7%312th of 441 in MD
Healthcare workers4.6%
3rd
U.S. 9.7% · MD 9%367th of 444 in MD

Measure	20851	Montgomery	MD	U.S.	National percentile	Rank in MD
Foreign-born residents	38.5%	33.6%	16.6%	14.1%	94th	13th of 446
Tech workers	8.5%	8.2%	6.4%	3.8%	94th	87th of 444
Diversity index	69.6	74.1	67.7	61.4	93rd	32nd of 446
Government workers	22.4%	21.5%	22.5%	14.5%	91st	193rd of 444
Work from home	25.6%	28.3%	19.3%	15.1%	89th	78th of 444
Median household incomeStrength	$126,411	$132,450	$103,678	$80,734	88th	136th of 414
Population density	5,894/sq mi	2,162/sq mi	639/sq mi	95/sq mi	85th	36th of 446
Median gross rent	$2,043	$2,068	$1,705	$1,413	85th	77th of 338
Average commuteWeakness	31.8 min	31.9 min	31.1 min	26.4 min	82nd	198th of 421
Median home value	$568,900	$640,300	$419,900	$332,700	79th	92nd of 421
Per capita income	$51,567	$67,571	$52,979	$44,673	74th	227th of 446
Bachelor's degree or higher	46.2%	60.6%	43.4%	35.7%	74th	151st of 445
Uninsured rate	10%	7%	6.3%	8.4%	71st	43rd of 444
Median earnings per worker	$55,625	$71,294	$61,200	$49,666	68th	260th of 443
Broadband access	92.8%	95.7%	92.4%	91%	56th	235th of 441
Rent-burdened renters	50.8%	51.6%	51.5%	51.1%	50th	187th of 404
Median age	38.6	40.2	39.4	38.9	47th	304th of 446
Poverty rate	9.1%	7.5%	9.4%	12.5%	39th	157th of 441
Veterans	4.6%	4.2%	6.8%	6.2%	33rd	346th of 446
Residents under 18	20%	22.8%	22.2%	22%	31st	283rd of 446
Homeownership rate	57.5%	65.3%	67.6%	65.2%	28th	375th of 441
Residents 65 and older	13.1%	17%	16.7%	17.2%	24th	363rd of 446
Population	14,946	1,065,949	6,206,011	334,922,499	23rd	152nd of 446
Self-employed workers	7%	11%	8.7%	10%	19th	303rd of 444
Income inequality (Gini)Strength	0.396	0.469	0.456	0.483	18th	249th of 438
Unemployment rateStrength	3%	4.9%	4.9%	5.2%	16th	288th of 444
Housing vacancy	3.4%	4.3%	7.7%	10.1%	15th	312th of 441
Healthcare workers	4.6%	8.3%	9%	9.7%	3rd	367th of 444

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

14%

5–17

18–24

16%

25–34

13%

35–44

16%

45–54

13%

55–64

65–74

75+

Median age

38.6

Under 18

20%

65 and over

13.1%

Race and ethnicity

White29%
Black11%
Hispanic44%
Asian12%
Native American0%
Pacific Islander0%
Other0.4%
Multiracial4%

Diversity index

69.6

U.S. 61.4

Foreign-born

38.5%

U.S. 14.1%

Born in state

31.1%

Language spoken at home (households)

English only

43%

Spanish

35%

Other Indo-European

10%

Asian / Pacific

Other

Households

Households: 5,155
Average household size: 2.9
Family households: 74%
Married couples: 47.8%
Living alone: 18.3%
Veterans (of adults): 4.6%
Male / female: 51% / 49%

Income and poverty

Household income distribution

<$25k

$25–50k

$50–75k

13%

$75–100k

11%

$100–150k

23%

$150–200k

17%

$200k+

23%

Median household income

20851

$126,411

Montgomery Co.

$132,450

Maryland

$103,678

United States

$80,734

Per capita income

$51,567

U.S. $44,673

Poverty rate

9.1%

U.S. 12.5%

Households earning $150K+

39.5%

U.S. 23%

Income inequality (Gini)

0.396

U.S. 0.483

Housing

Median home value

20851

$568,900

Montgomery Co.

$640,300

Maryland

$419,900

United States

$332,700

Median gross rent

20851

$2,043

Montgomery Co.

$2,068

Maryland

$1,705

United States

$1,413

Types of housing

Single-family

71%

2–4 units

5–19 units

17%

20+ units

10%

Mobile home

Boat, RV, van

Housing units: 5,338
Owner-occupied: 57.5%
Vacant: 3.4%
Median year built: 1959
Median rooms: 6
Renters paying 30%+ of income: 50.8%
Renters paying 50%+ of income: 20.8%
Home value to income: 4.5× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

53%

Carpooled

Transit

12%

Walked

Bicycle

Worked from home

26%

Other

Commute time (one way)

<10 min

10–19

21%

20–29

21%

30–44

21%

45–59

16%

60+

14%

Average commute

31.8 min

U.S. 26.4 min

Unemployment

U.S. 5.2%

In labor force

76.5%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Construction and repair

10%

Sales

10%

Cleaning and personal care

Management

Computer and math

Office and admin

Food service

Transportation and moving

Engineering and science

Business and finance

Education

Healthcare

Arts, media and sports

Legal and social services

Production

Police and fire

Farming, fishing and forestry

Industries

Professional and technical services

15%

Health care and social assistance

11%

Construction

10%

Retail

Restaurants and hotels

Admin, support and management

Public administration

Education

Other services

Transportation, warehousing and utilities

Finance, insurance and real estate

Arts and recreation

Wholesale

Manufacturing

Information

Agriculture and mining

Median earnings per worker

$55,625

U.S. $49,666

Self-employed

U.S. 10%

Government workers

22.4%

U.S. 14.5%

Nonprofit workers

9.3%

U.S. 8.8%

Median earnings by type of work

Type of work	20851	U.S.
Management, business, science and arts	$93,756	$74,888
Service	$32,318	$26,804
Sales and office	$50,539	$40,476
Construction and maintenance	$35,625	$49,199
Production and transportation	$42,115	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

16%

High school

20%

Some college

12%

Associate's

Bachelor's

24%

Graduate

22%

High school graduate or higher: 84.5%
Bachelor's degree or higher: 46.2%
Graduate or professional degree: 22.2%
Households with broadband: 92.8%
Cable, fiber or DSL: 82.8%
No internet access: 5.9%
Without health insurance: 10%
Limited-English households: 12.3%

Geography

City (USPS): Rockville
State: Maryland
County: Montgomery County
Center point: 39.0781° N, 77.1208° W
Land area: 2.5 sq mi
Water area: under 0.1 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Rockville81% of zip
North Bethesda (unincorporated)12% of zip
Aspen Hill (unincorporated)7% of zip

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

Zip codes near 20851

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
20847	Rockville, MD · PO box	1.8 mi	—	—	—
20849	Rockville, MD · PO box	1.8 mi	—	—	—
20852	Rockville, MD	1.8 mi	48,180	$122,472	$665,200
20857	Rockville, MD · PO box	1.8 mi	—	—	—
20883	Gaithersburg, MD · PO box	2.1 mi	—	—	—
20853	Rockville, MD	2.2 mi	31,851	$159,080	$631,900
20850	Rockville, MD	3.3 mi	50,353	$125,950	$714,400
20896	Garrett Park, MD	3.3 mi	932	$250,000+	$1,005,700
20906	Silver Spring, MD	3.6 mi	70,595	$97,521	$455,800
20855	Derwood, MD	4.1 mi	17,279	$149,110	$640,300
20895	Kensington, MD	4.2 mi	19,184	$173,625	$781,500
20891	Kensington, MD · PO box	4.3 mi	—	—	—

Zip codes like 20851 elsewhere

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

Questions about 20851

What city is zip code 20851?

20851 is assigned to Rockville, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 20851 in?

20851 is in Montgomery County, Maryland.

What is the population of 20851?

About 14,946 people live in 20851, according to the Census Bureau's American Community Survey.

What time zone is 20851 in?

20851 is in Eastern Time.

What is the median household income in 20851?

The median household income in 20851 is $126,411.

What zip codes are near 20851?

The closest zip codes to 20851 are 20847, 20849, 20852, 20857, 20883.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 20851, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.