21711 ZIP Code — Big Pool, MD

Washington County, Maryland

ZIP code 21711 is located in Big Pool, Maryland, within Washington County. It covers approximately 24.56 square miles and serves a population of 864 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 301/240.

About ZIP code 21711

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1950s, giving the area an established character. Median home value is $265,200. Owner-occupancy is high at 99%, well above the national average.

Median household income is $92,868.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.

College attainment at 19% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (21%) compared to national benchmarks.

Overall, ZIP code 21711 reflects a community defined by a trades-oriented workforce and high homeownership.

864

population

24.56

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21711 ZIP code map

Cities in ZIP code 21711

Below are the cities the US Postal Service accepts for ZIP code 21711. Using any city not on this list may result in mail delivery delays.

City	Status
Big Pool	Preferred

Nearby ZIP codes

21722 Clear Spring (6.7 mi) 21750 Hancock (9 mi) 25419 Falling Waters (9.6 mi) 25427 Hedgesville (10.4 mi) 21795 Williamsport (12 mi) 17236 Mercersburg (12 mi) 25403 Martinsburg (12.3 mi) 25411 Berkeley Springs (12.6 mi) 25401 Martinsburg (13.9 mi) 25404 Martinsburg (14.1 mi) 17238 Needmore (14.7 mi) 21767 Maugansville (15.1 mi)

Demographics updated 05/2026

Population
Total population	864
Population density	35 / sq mi
State FIPS	24
County FIPS	043

Geography
Land area	24.56 sq mi
Water area	0.68 sq mi
Latitude	39.6609
Longitude	-78.0279
Timezone	Eastern (ET)
Area code	301/240

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.6%	40.3%	28.2%
$50k – $100k	41.4%	30.7%	28.2%
$100k – $200k	20.0%	23.5%	30.1%
Over $200k	14.0%	5.6%	13.4%

Demographics & statistics

864

Population

People per sq mi

52.6

Median age

$92,868

Median household income

$52,135

Per capita income

$265,200

Median home value

Median monthly rent

98.6%

Home ownership

11.2%

Poverty rate

3.0%

Unemployment

485

Housing units

19.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

104

45–54

123

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	113	13.1%
18 and over	751	86.9%
65 and over	198	22.9%
Median age	52.6 years

Race & ethnicity

White 100%

Group	Count	%
White	864	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.6%	40.3%	28.2%
$50k – $100k	41.4%	30.7%	28.2%
$100k – $200k	20.0%	23.5%	30.1%
Over $200k	14.0%	5.6%	13.4%

Under $10k 17.9%

$10k–$15k 4.1%

$25k–$35k 1.1%

$35k–$50k 7.9%

$50k–$75k 4.3%

$75k–$100k 17.9%

$100k–$150k 20.9%

$150k–$200k 10.7%

$200k+ 15.2%

Range	% of households
Under $10k	17.9%
$10k–$15k	4.1%
$25k–$35k	1.1%
$35k–$50k	7.9%
$50k–$75k	4.3%
$75k–$100k	17.9%
$100k–$150k	20.9%
$150k–$200k	10.7%
$200k+	15.2%
Median income	$92,868

Housing

Home values

$50k–$100k 3.4%

$100k–$150k 5.1%

$150k–$200k 15.4%

$200k–$300k 36.3%

$300k–$500k 26.0%

$500k–$1M 10.3%

$1M+ 3.4%

Housing overview

Metric	Value
Median home value	$265,200
Median rent / month	$0
Owner occupied	98.6%
Renter occupied	1.4%
Vacant	10.2%
Single-family detached	95.9%
Large apartment buildings	0.0%
Mobile homes	4.1%
Median rooms	7.8
Avg household size (owned)	1.92

Year built

Era	%
2020 or later	0.0%
2010–2019	14.3%
2000–2009	18.5%
1990–1999	18.1%
1980–1989	10.2%
1970–1979	1.2%
1960–1969	13.6%
1950–1959	21.0%
1940–1949	3.1%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	3.9%
2 bedrooms	11.8%
3 bedrooms	72.3%
4 bedrooms	12.0%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	7.9%
2 vehicles	25.2%
3 or more	66.9%

Heating fuel

Fuel type	%
Electricity	34.5%
Propane / LP gas	3.6%
Fuel oil	40.4%
Wood	13.8%
Solar	3.4%
No fuel used	4.3%

Households & families

Household type	Count	%
Married-couple family	244	55.3%
Cohabiting couple	19	4.3%
Male householder, no spouse	19	4.3%
Female householder, no spouse	159	36.1%
Households with children under 18	67	15.2%
Households with seniors (65+)	142	32.2%
Average household size	1.96

Marital status

Status	Male	Female
Never married	26.3%	5.8%
Married	73.7%	55.6%
Separated	0.0%	19.2%
Widowed	0.0%	15.3%
Divorced	0.0%	4.1%

Education

Less than 9th grade 0.5%

Some HS, no diploma 2.1%

HS graduate 49.1%

Some college, no degree 13.0%

Associate's degree 16.1%

Bachelor's degree 13.7%

Graduate / professional 5.5%

Metric	%
HS diploma or higher	97.4%
Bachelor's or higher	19.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	50	52.6%
High school	14	14.7%
College / grad school	31	32.6%

Employment

Industry of employment

Education & healthcare 27.9%

Construction 15.0%

Retail trade 10.8%

Public administration 8.8%

Transportation & utilities 7.7%

Professional & management 7.7%

Manufacturing 7.1%

Other services 5.2%

Information 5.0%

Agriculture & mining 4.8%

Occupation

Category	%
Management, business & arts	27.9%
Service	15.8%
Sales & office	27.5%
Natural resources & construction	11.9%
Production & transportation	16.9%

Employment type

Type	%
Private sector	59.8%
Government	22.3%
Self-employed	17.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	90.0%
Carpool	4.0%
Public transit	0.0%
Walk	0.0%
Work from home	6.0%
Other means	0.0%
Avg commute (minutes)	31.6

Poverty

All people 11.2%

Under 18 years 0.0%

18 and over 12.9%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	24.7%
Retirement income	17.9%
Supplemental Security	2.0%
Cash public assistance	0.0%
Food stamps / SNAP	4.1%

Health indicators

Condition	%
Obesity	35.6%
High blood pressure	36.9%
High cholesterol	35.5%
Diabetes	10.5%
Heart disease	6.9%
Stroke	3.1%
Asthma	10.2%
Arthritis	28.3%
Kidney disease	2.8%
Pulmonary disease	7.8%
Cancer	7.1%

Behavior / access	%
Smoking	21.4%
Binge drinking	15.0%
No physical activity	27.0%
Less than 7 hrs sleep	33.9%
Depression	20.8%
Fair or poor health	13.7%
Poor mental health	14.6%
Poor physical health	10.1%
No health insurance	11.7%
Visited doctor (checkup)	76.4%
Visited dentist	62.4%
Cholesterol screening	91.1%
Teeth loss	14.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	5.4%
Under 18	0.0%
18–64 years	2.0%
65 and over	18.2%

Health insurance coverage

Type	%
Private insurance	81.1%
Public insurance	20.9%
No insurance	13.8%
Uninsured under 19	17.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	819	94.8%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	864	100.0%
Born in same state	864	100.0%
Born in different state	684	79.2%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	61	7.1%
Italian	51	5.9%

Ancestry	Count	%
German	15	1.7%

Technology access

Metric	% of households
Computer access	51.0%
Internet access	91.4%

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

Frequently asked questions about ZIP code 21711

What city is ZIP code 21711 in?

ZIP code 21711 is primarily assigned to Big Pool, Maryland.

What county is ZIP code 21711 in?

ZIP code 21711 falls within Washington County, Maryland.

Is ZIP code 21711 mostly owner-occupied?

99% of occupied units in ZIP code 21711 are owner-occupied, well above the national average.

What is the population of ZIP code 21711?

ZIP code 21711 has an estimated population of 864 residents, with a density of 35 people per square mile.

What is the median household income in ZIP code 21711?

The median household income in ZIP code 21711 is $92,868, above the national median of ~$75,000.

What is the typical home value in ZIP code 21711?

The median home value in ZIP code 21711 is $265,200.

What timezone is ZIP code 21711 in?

ZIP code 21711 observes the EST timezone.