21756 ZIP Code — Keedysville, MD

Washington County, Maryland

ZIP code 21756 is located in Keedysville, Maryland, within Washington County. It covers approximately 23.29 square miles and serves a population of 3,303 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 301/240.

About ZIP code 21756

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $339,900. Owner-occupancy is high at 97%, well above the national average.

The gap between median ($92,222) and mean household income suggests income inequality — a small number of higher earners pull the average up. 37% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. An above-average commute of 46 minutes suggests many residents work outside the immediate area. Remote work is prevalent — 22% of workers work from home.

Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 12% of civilians, above the national average of 7%.

Overall, ZIP code 21756 reflects a community defined by a strong veteran community, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

3,303

population

23.29

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21756 ZIP code map

Cities in ZIP code 21756

Below are the cities the US Postal Service accepts for ZIP code 21756. Using any city not on this list may result in mail delivery delays.

City	Status
Keedysville	Preferred

Nearby ZIP codes

21779 Rohrersville (3.4 mi) 21782 Sharpsburg (3.5 mi) 21713 Boonsboro (4.8 mi) 21718 Burkittsville (5.4 mi) 25443 Shepherdstown (5.8 mi) 21758 Knoxville (6.5 mi) 21733 Fairplay (7.3 mi) 21769 Middletown (7.3 mi) 25442 Shenandoah Junction (8.7 mi) 21755 Jefferson (9.8 mi) 21773 Myersville (10 mi) 21716 Brunswick (10.2 mi)

Demographics updated 05/2026

Population
Total population	3,303
Population density	142 / sq mi
State FIPS	24
County FIPS	043

Geography
Land area	23.29 sq mi
Water area	0.01 sq mi
Latitude	39.4497
Longitude	-77.7049
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	36.0%	40.3%	28.2%
$50k – $100k	22.3%	30.7%	28.2%
$100k – $200k	31.4%	23.5%	30.1%
Over $200k	10.2%	5.6%	13.4%

Demographics & statistics

3,303

Population

142

People per sq mi

45.6

Median age

$92,222

Median household income

$46,002

Per capita income

$339,900

Median home value

$1,438

Median monthly rent

97.2%

Home ownership

1.9%

Poverty rate

4.4%

Unemployment

1,312

Housing units

25.4%

Bachelor's or higher

Age distribution

Male Female

120

Under 5

131

5–9

117

10–14

128

102

15–19

111

20–24

101

133

25–34

146

148

35–44

161

213

45–54

232

133

55–59

146

141

60–64

153

189

65–74

206

111

75–84

121

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	801	24.3%
18 and over	2,502	75.7%
65 and over	672	20.3%
Median age	45.6 years

Race & ethnicity

White 95.2%

Two or more races 3.1%

Hispanic or Latino 1.1%

Asian 0.6%

Group	Count	%
White	3,179	95.2%
Two or more races	104	3.1%
Hispanic or Latino	37	1.1%
Asian	20	0.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	36.0%	40.3%	28.2%
$50k – $100k	22.3%	30.7%	28.2%
$100k – $200k	31.4%	23.5%	30.1%
Over $200k	10.2%	5.6%	13.4%

Under $10k 1.5%

$10k–$15k 0.1%

$15k–$25k 3.7%

$25k–$35k 13.5%

$35k–$50k 3.8%

$50k–$75k 15.8%

$75k–$100k 13.4%

$100k–$150k 19.9%

$150k–$200k 13.5%

$200k+ 14.8%

Range	% of households
Under $10k	1.5%
$10k–$15k	0.1%
$15k–$25k	3.7%
$25k–$35k	13.5%
$35k–$50k	3.8%
$50k–$75k	15.8%
$75k–$100k	13.4%
$100k–$150k	19.9%
$150k–$200k	13.5%
$200k+	14.8%
Median income	$92,222

Housing

Home values

Under $50k 9.9%

$100k–$150k 10.4%

$150k–$200k 2.3%

$200k–$300k 17.0%

$300k–$500k 42.7%

$500k–$1M 15.7%

$1M+ 2.0%

Housing overview

Metric	Value
Median home value	$339,900
Median rent / month	$1,438
Owner occupied	97.2%
Renter occupied	2.8%
Vacant	6.3%
Single-family detached	97.8%
Large apartment buildings	0.0%
Mobile homes	1.6%
Median rooms	7.9
Avg household size (owned)	2.62

Year built

Era	%
2020 or later	0.0%
2010–2019	1.1%
2000–2009	26.3%
1990–1999	20.5%
1980–1989	6.3%
1970–1979	6.9%
1960–1969	1.3%
1950–1959	4.0%
1940–1949	0.0%
1939 or earlier	33.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.2%
2 bedrooms	9.4%
3 bedrooms	49.4%
4 bedrooms	28.9%
5+ bedrooms	10.2%

Vehicles per household

Vehicles	% of households
No vehicle	1.1%
1 vehicle	15.3%
2 vehicles	22.5%
3 or more	61.1%

Heating fuel

Fuel type	%
Utility gas	1.6%
Electricity	53.7%
Propane / LP gas	16.4%
Fuel oil	23.7%
Wood	4.2%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	772	61.2%
Cohabiting couple	37	2.9%
Male householder, no spouse	287	22.7%
Female householder, no spouse	166	13.2%
Households with children under 18	500	39.6%
Households with seniors (65+)	458	36.3%
Average household size	2.61

Marital status

Status	Male	Female
Never married	26.7%	21.4%
Married	61.6%	60.3%
Separated	4.3%	0.0%
Widowed	0.2%	10.0%
Divorced	7.2%	8.4%

Education

Less than 9th grade 1.8%

Some HS, no diploma 7.9%

HS graduate 37.9%

Some college, no degree 22.5%

Associate's degree 4.6%

Bachelor's degree 10.3%

Graduate / professional 15.1%

Metric	%
HS diploma or higher	90.3%
Bachelor's or higher	25.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	178	20.8%
Kindergarten	35	4.1%
Elementary school	285	33.4%
High school	227	26.6%
College / grad school	129	15.1%

Employment

Industry of employment

Education & healthcare 17.8%

Public administration 14.8%

Construction 13.1%

Professional & management 12.9%

Retail trade 12.5%

Arts, food & hospitality 6.7%

Transportation & utilities 6.3%

Manufacturing 4.4%

Finance & real estate 3.1%

Other services 3.0%

Wholesale trade 2.1%

Agriculture & mining 1.6%

Information 1.6%

Occupation

Category	%
Management, business & arts	41.4%
Service	9.6%
Sales & office	17.4%
Natural resources & construction	18.4%
Production & transportation	13.2%

Employment type

Type	%
Private sector	71.1%
Government	25.6%
Self-employed	3.0%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	65.2%
Carpool	5.3%
Public transit	7.4%
Walk	0.4%
Work from home	21.7%
Other means	0.0%
Avg commute (minutes)	46.1

Poverty

All people 1.9%

Under 18 years 2.0%

18 and over 1.8%

Married-couple families 1.2%

Female-led households 8.2%

Income support

Source	% of households
Social Security	36.8%
Retirement income	36.0%
Supplemental Security	2.6%
Cash public assistance	3.6%
Food stamps / SNAP	5.4%

Health indicators

Condition	%
Obesity	33.9%
High blood pressure	32.5%
High cholesterol	33.3%
Diabetes	8.6%
Heart disease	5.3%
Stroke	2.3%
Asthma	9.9%
Arthritis	24.7%
Kidney disease	2.3%
Pulmonary disease	5.7%
Cancer	6.5%

Behavior / access	%
Smoking	16.8%
Binge drinking	16.1%
No physical activity	21.4%
Less than 7 hrs sleep	32.7%
Depression	20.1%
Fair or poor health	10.1%
Poor mental health	13.8%
Poor physical health	8.2%
No health insurance	8.9%
Visited doctor (checkup)	76.4%
Visited dentist	69.4%
Cholesterol screening	92.2%
Teeth loss	9.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	303	12.1%

Disability	%
Any disability	11.0%
Under 18	4.5%
18–64 years	7.7%
65 and over	27.8%

Health insurance coverage

Type	%
Private insurance	82.2%
Public insurance	32.8%
No insurance	4.8%
Uninsured under 19	18.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,052	92.4%
Spanish	18	0.6%
Other Indo-European	3	0.1%
Asian & Pacific Islander	10	0.3%
Other languages	5	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,233	97.9%
Born in same state	3,219	97.5%
Born in different state	2,008	60.8%
Foreign born	14	0.4%
Naturalized citizen	70	2.1%
Not a US citizen	57	81.4%

Ancestry

Ancestry	Count	%
French	738	22.3%
Italian	377	11.4%
Arab	305	9.2%

Ancestry	Count	%
English	29	0.9%
German	12	0.4%
Irish	9	0.3%

Technology access

Metric	% of households
Computer access	38.2%
Internet access	96.8%

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

Frequently asked questions about ZIP code 21756

What city is ZIP code 21756 in?

ZIP code 21756 is primarily assigned to Keedysville, Maryland.

What county is ZIP code 21756 in?

ZIP code 21756 falls within Washington County, Maryland.

Is ZIP code 21756 mostly owner-occupied?

97% of occupied units in ZIP code 21756 are owner-occupied, well above the national average.

Does ZIP code 21756 have a large veteran population?

12% of civilians in ZIP code 21756 are veterans, above the national average of ~7%.

Does ZIP code 21756 have a large retiree population?

37% of households in ZIP code 21756 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 21756?

The median home value in ZIP code 21756 is $339,900.

What timezone is ZIP code 21756 in?

ZIP code 21756 observes the EST timezone.