20850 ZIP Code — Rockville, MD

Montgomery County, Maryland

ZIP code 20850 is located in Rockville, Maryland, within Montgomery County. It covers approximately 14.12 square miles and serves a population of 51,072 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 240/301.

About ZIP code 20850

The housing stock consists of a significant share of large multi-unit buildings. Most homes were built in the 2000s, giving the area an established character. Median home value is $665,400. Owner-occupancy sits near the national average at 53%.

The gap between median ($125,268) and mean household income suggests income inequality — a small number of higher earners pull the average up.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. The average commute of 32 minutes is near the national average. Remote work is prevalent — 29% of workers work from home.

Educational attainment is high — 67% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 20850 reflects a community defined by a highly educated population and a high rate of remote workers.

51,072

population

14.12

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

20850 ZIP code map

Cities in ZIP code 20850

Below are the cities the US Postal Service accepts for ZIP code 20850. Using any city not on this list may result in mail delivery delays.

City	Status
Rockville	Acceptable
Rockville	Preferred

Nearby ZIP codes

20857 Rockville (2 mi) 20878 Gaithersburg (3.3 mi) 20877 Gaithersburg (3.5 mi) 20851 Rockville (3.7 mi) 20899 Gaithersburg (3.8 mi) 20852 Rockville (4.4 mi) 20855 Derwood (4.6 mi) 20853 Rockville (5.1 mi) 20854 Potomac (5.4 mi) 20886 Montgomery Village (5.9 mi) 20879 Gaithersburg (6 mi) 20817 Bethesda (6.2 mi)

Demographics updated 05/2026

Population
Total population	51,072
Population density	3,617 / sq mi
State FIPS	24
County FIPS	031

Geography
Land area	14.12 sq mi
Water area	0.06 sq mi
Latitude	39.0892
Longitude	-77.1909
Timezone	Eastern (ET)
Area code	240/301

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	20.6%	20.6%	28.2%
$50k – $100k	23.0%	24.2%	28.2%
$100k – $200k	35.0%	31.9%	30.1%
Over $200k	21.4%	23.3%	13.4%

Demographics & statistics

51,072

Population

3,617

People per sq mi

40.2

Median age

$125,268

Median household income

$65,894

Per capita income

$665,400

Median home value

$2,237

Median monthly rent

53.4%

Home ownership

7.5%

Poverty rate

4.0%

Unemployment

12,561

Housing units

66.5%

Bachelor's or higher

Age distribution

Male Female

1,206

Under 5

1,373

1,250

5–9

1,422

1,483

10–14

1,688

1,077

15–19

1,226

1,544

20–24

1,756

3,446

25–34

3,921

3,317

35–44

3,774

3,246

45–54

3,692

1,597

55–59

1,817

1,305

60–64

1,484

1,988

65–74

2,262

1,716

75–84

1,953

715

85+

814

← Male

Female →

Age summary

Group	Count	%
Under 18	10,063	19.7%
18 and over	41,009	80.3%
65 and over	9,448	18.5%
Median age	40.2 years

Race & ethnicity

White 44%

Asian 24%

Black or African American 10.4%

Hispanic or Latino 9%

Two or more races 7%

Other race 5.5%

American Indian / Alaska Native 0.1%

Group	Count	%
White	24,690	44%
Asian	13,467	24%
Black or African American	5,845	10.4%
Hispanic or Latino	5,033	9%
Two or more races	3,949	7%
Other race	3,059	5.5%
American Indian / Alaska Native	62	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	20.6%	20.6%	28.2%
$50k – $100k	23.0%	24.2%	28.2%
$100k – $200k	35.0%	31.9%	30.1%
Over $200k	21.4%	23.3%	13.4%

Under $10k 3.1%

$10k–$15k 2.6%

$15k–$25k 4.7%

$25k–$35k 3.4%

$35k–$50k 4.8%

$50k–$75k 9.8%

$75k–$100k 10.7%

$100k–$150k 21.3%

$150k–$200k 13.4%

$200k+ 26.2%

Range	% of households
Under $10k	3.1%
$10k–$15k	2.6%
$15k–$25k	4.7%
$25k–$35k	3.4%
$35k–$50k	4.8%
$50k–$75k	9.8%
$75k–$100k	10.7%
$100k–$150k	21.3%
$150k–$200k	13.4%
$200k+	26.2%
Median income	$125,268

Housing

Home values

Under $50k 0.5%

$50k–$100k 0.6%

$100k–$150k 1.0%

$150k–$200k 1.9%

$200k–$300k 3.4%

$300k–$500k 18.8%

$500k–$1M 59.3%

$1M+ 14.6%

Housing overview

Metric	Value
Median home value	$665,400
Median rent / month	$2,237
Owner occupied	53.4%
Renter occupied	46.6%
Vacant	6.2%
Single-family detached	31.0%
Large apartment buildings	30.3%
Mobile homes	0.0%
Median rooms	5.2
Avg household size (owned)	2.65

Year built

Era	%
2020 or later	0.2%
2010–2019	14.1%
2000–2009	27.5%
1990–1999	19.0%
1980–1989	6.3%
1970–1979	13.1%
1960–1969	10.2%
1950–1959	5.7%
1940–1949	1.1%
1939 or earlier	2.9%

Bedrooms

Size	% of units
No bedroom (studio)	3.5%
1 bedroom	19.3%
2 bedrooms	26.1%
3 bedrooms	25.4%
4 bedrooms	18.2%
5+ bedrooms	7.6%

Vehicles per household

Vehicles	% of households
No vehicle	9.1%
1 vehicle	42.5%
2 vehicles	37.2%
3 or more	11.2%

Heating fuel

Fuel type	%
Utility gas	61.3%
Electricity	36.1%
Propane / LP gas	1.2%
Fuel oil	0.5%
Wood	0.1%
Solar	0.2%
No fuel used	0.4%

Households & families

Household type	Count	%
Married-couple family	9,737	46.5%
Cohabiting couple	1,346	6.4%
Male householder, no spouse	3,451	16.5%
Female householder, no spouse	6,417	30.6%
Households with children under 18	5,843	27.9%
Households with seniors (65+)	6,235	29.8%
Average household size	2.38

Marital status

Status	Male	Female
Never married	34.0%	31.8%
Married	56.3%	46.2%
Separated	1.3%	2.2%
Widowed	2.0%	7.5%
Divorced	6.3%	12.3%

Education

Less than 9th grade 2.9%

Some HS, no diploma 2.5%

HS graduate 9.3%

Some college, no degree 13.0%

Associate's degree 5.8%

Bachelor's degree 27.8%

Graduate / professional 38.7%

Metric	%
HS diploma or higher	94.6%
Bachelor's or higher	66.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	531	4.6%
Kindergarten	705	6.1%
Elementary school	4,579	39.3%
High school	2,135	18.3%
College / grad school	3,688	31.7%

Employment

Industry of employment

Professional & management 24.3%

Education & healthcare 20.5%

Public administration 14.8%

Finance & real estate 7.3%

Other services 6.5%

Retail trade 6.0%

Arts, food & hospitality 5.7%

Construction 5.4%

Information 3.0%

Manufacturing 2.8%

Transportation & utilities 2.7%

Wholesale trade 0.9%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	68.8%
Service	9.6%
Sales & office	14.9%
Natural resources & construction	3.8%
Production & transportation	2.9%

Employment type

Type	%
Private sector	68.1%
Government	27.1%
Self-employed	4.6%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	50.9%
Carpool	5.1%
Public transit	11.5%
Walk	2.3%
Work from home	28.5%
Other means	1.7%
Avg commute (minutes)	31.7

Poverty

All people 7.5%

Under 18 years 7.8%

18 and over 7.5%

Married-couple families 4.3%

Female-led households 10.0%

Income support

Source	% of households
Social Security	24.6%
Retirement income	21.3%
Supplemental Security	3.8%
Cash public assistance	3.1%
Food stamps / SNAP	7.2%

Health indicators

Condition	%
Obesity	18.8%
High blood pressure	25.9%
High cholesterol	32.4%
Diabetes	7.3%
Heart disease	4.3%
Stroke	2.0%
Asthma	7.6%
Arthritis	17.3%
Kidney disease	2.2%
Pulmonary disease	3.4%
Cancer	5.9%

Behavior / access	%
Smoking	7.7%
Binge drinking	12.4%
No physical activity	14.8%
Less than 7 hrs sleep	28.5%
Depression	14.7%
Fair or poor health	7.6%
Poor mental health	10.4%
Poor physical health	5.5%
No health insurance	9.2%
Visited doctor (checkup)	72.6%
Visited dentist	72.5%
Cholesterol screening	93.6%
Teeth loss	5.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,786	4.4%

Disability	%
Any disability	10.7%
Under 18	3.3%
18–64 years	6.7%
65 and over	32.9%

Health insurance coverage

Type	%
Private insurance	81.4%
Public insurance	27.1%
No insurance	4.3%
Uninsured under 19	3.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	48,493	95.0%
Spanish	7,489	15.4%
Other Indo-European	1,529	3.2%
Asian & Pacific Islander	1,602	3.3%
Other languages	3,961	8.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	33,308	65.2%
Born in same state	32,368	63.4%
Born in different state	11,919	23.3%
Foreign born	940	1.8%
Naturalized citizen	17,764	34.8%
Not a US citizen	11,013	62.0%

Ancestry

Ancestry	Count	%
Italian	3,871	7.6%
French	3,496	6.8%
Arab	1,372	2.7%
Irish	505	1%
Polish	177	0.3%

Ancestry	Count	%
Norwegian	173	0.3%
German	148	0.3%
English	143	0.3%
Dutch	95	0.2%

Technology access

Metric	% of households
Computer access	41.0%
Internet access	97.7%

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

Frequently asked questions about ZIP code 20850

What part of Rockville is ZIP code 20850?

ZIP code 20850 covers a portion of Rockville, Maryland, within Montgomery County.

What county is ZIP code 20850 in?

ZIP code 20850 falls within Montgomery County, Maryland.

How educated is the population of ZIP code 20850?

67% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 20850?

The median household income in ZIP code 20850 is $125,268, above the national median of ~$75,000.

What is the typical home value in ZIP code 20850?

The median home value in ZIP code 20850 is $665,400.

What is the population of ZIP code 20850?

ZIP code 20850 has an estimated population of 51,072 residents, with a density of 3,618 people per square mile.

What timezone is ZIP code 20850 in?

ZIP code 20850 observes the EST timezone.