21755 ZIP Code — Jefferson, MD

Frederick County, Maryland

ZIP code 21755 is located in Jefferson, Maryland, within Frederick County. It covers approximately 34.32 square miles and serves a population of 5,706 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 301/240.

About ZIP code 21755

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $463,400. Owner-occupancy is high at 88%, well above the national average.

Median household income is $129,085. 30% 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. The average commute of 30 minutes is near the national average.

Educational attainment is near the national average, with 42% of residents holding a bachelor's degree or higher.

Overall, ZIP code 21755 reflects a community defined by high homeownership and a significant Social Security-dependent population.

5,706

population

34.32

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21755 ZIP code map

Cities in ZIP code 21755

Below are the cities the US Postal Service accepts for ZIP code 21755. Using any city not on this list may result in mail delivery delays.

City	Status
Jefferson	Preferred

Nearby ZIP codes

20103 Dulles (2.9 mi) 20104 Dulles (2.9 mi) 21716 Brunswick (3.5 mi) 21718 Burkittsville (4.4 mi) 21758 Knoxville (4.7 mi) 21777 Point Of Rocks (5.3 mi) 21703 Frederick (6.2 mi) 21769 Middletown (6.3 mi) 20180 Lovettsville (6.4 mi) 21779 Rohrersville (6.4 mi) 21790 Tuscarora (7.3 mi) 21710 Adamstown (8.1 mi)

Demographics updated 05/2026

Population
Total population	5,706
Population density	166 / sq mi
State FIPS	24
County FIPS	021

Geography
Land area	34.32 sq mi
Water area	0.62 sq mi
Latitude	39.3510
Longitude	-77.5742
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	18.8%	22.0%	28.2%
$50k – $100k	26.3%	27.2%	28.2%
$100k – $200k	36.3%	36.5%	30.1%
Over $200k	18.6%	14.3%	13.4%

Demographics & statistics

5,706

Population

166

People per sq mi

43.6

Median age

$129,085

Median household income

$51,737

Per capita income

$463,400

Median home value

$1,133

Median monthly rent

88.1%

Home ownership

8.6%

Poverty rate

3.8%

Unemployment

1,902

Housing units

41.9%

Bachelor's or higher

Age distribution

Male Female

160

Under 5

163

134

5–9

137

187

10–14

190

195

15–19

199

172

20–24

176

284

25–34

290

307

35–44

313

316

45–54

322

308

55–59

313

254

60–64

258

294

65–74

299

161

75–84

165

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,215	21.3%
18 and over	4,491	78.7%
65 and over	1,028	18.0%
Median age	43.6 years

Race & ethnicity

White 72.4%

Hispanic or Latino 10.6%

Two or more races 7.6%

Other race 5%

Black or African American 2.8%

Asian 1.6%

Group	Count	%
White	4,619	72.4%
Hispanic or Latino	678	10.6%
Two or more races	482	7.6%
Other race	321	5%
Black or African American	179	2.8%
Asian	103	1.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	18.8%	22.0%	28.2%
$50k – $100k	26.3%	27.2%	28.2%
$100k – $200k	36.3%	36.5%	30.1%
Over $200k	18.6%	14.3%	13.4%

Under $10k 0.7%

$15k–$25k 2.4%

$25k–$35k 4.5%

$35k–$50k 4.5%

$50k–$75k 11.7%

$75k–$100k 12.6%

$100k–$150k 23.2%

$150k–$200k 19.9%

$200k+ 20.4%

Range	% of households
Under $10k	0.7%
$15k–$25k	2.4%
$25k–$35k	4.5%
$35k–$50k	4.5%
$50k–$75k	11.7%
$75k–$100k	12.6%
$100k–$150k	23.2%
$150k–$200k	19.9%
$200k+	20.4%
Median income	$129,085

Housing

Home values

Under $50k 1.8%

$100k–$150k 1.1%

$150k–$200k 1.3%

$200k–$300k 9.5%

$300k–$500k 46.7%

$500k–$1M 37.2%

$1M+ 2.4%

Housing overview

Metric	Value
Median home value	$463,400
Median rent / month	$1,133
Owner occupied	88.1%
Renter occupied	11.9%
Vacant	5.6%
Single-family detached	86.5%
Large apartment buildings	0.8%
Mobile homes	4.8%
Median rooms	7.8
Avg household size (owned)	2.67

Year built

Era	%
2020 or later	4.3%
2010–2019	7.4%
2000–2009	4.4%
1990–1999	30.7%
1980–1989	17.3%
1970–1979	13.7%
1960–1969	2.8%
1950–1959	4.3%
1940–1949	0.2%
1939 or earlier	14.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	0.0%
2 bedrooms	17.3%
3 bedrooms	35.0%
4 bedrooms	35.4%
5+ bedrooms	11.9%

Vehicles per household

Vehicles	% of households
No vehicle	0.2%
1 vehicle	13.1%
2 vehicles	43.9%
3 or more	42.7%

Heating fuel

Fuel type	%
Utility gas	22.6%
Electricity	57.1%
Propane / LP gas	7.3%
Fuel oil	8.4%
Wood	2.2%
Solar	0.5%

Households & families

Household type	Count	%
Married-couple family	1,405	69.4%
Cohabiting couple	113	5.6%
Male householder, no spouse	264	13.0%
Female householder, no spouse	242	12.0%
Households with children under 18	563	27.8%
Households with seniors (65+)	645	31.9%
Average household size	2.81

Marital status

Status	Male	Female
Never married	27.5%	27.3%
Married	63.5%	61.5%
Separated	0.8%	0.9%
Widowed	2.0%	3.6%
Divorced	6.1%	6.7%

Education

Less than 9th grade 4.2%

Some HS, no diploma 1.8%

HS graduate 27.3%

Some college, no degree 19.5%

Associate's degree 5.4%

Bachelor's degree 22.1%

Graduate / professional 19.8%

Metric	%
HS diploma or higher	94.0%
Bachelor's or higher	41.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	20	1.6%
Kindergarten	76	6.1%
Elementary school	483	39.0%
High school	343	27.7%
College / grad school	316	25.5%

Employment

Industry of employment

Education & healthcare 32.5%

Construction 11.2%

Professional & management 10.4%

Retail trade 8.6%

Arts, food & hospitality 7.2%

Other services 6.6%

Manufacturing 6.4%

Finance & real estate 5.3%

Public administration 5.1%

Transportation & utilities 2.8%

Agriculture & mining 2.3%

Wholesale trade 0.8%

Information 0.8%

Occupation

Category	%
Management, business & arts	56.1%
Service	9.8%
Sales & office	13.0%
Natural resources & construction	11.9%
Production & transportation	9.2%

Employment type

Type	%
Private sector	74.1%
Government	20.7%
Self-employed	4.3%
Unpaid family workers	0.9%

Commute

Method	%
Drive alone	74.4%
Carpool	5.7%
Public transit	1.2%
Walk	0.9%
Work from home	16.2%
Other means	1.5%
Avg commute (minutes)	30.1

Poverty

All people 8.6%

Under 18 years 20.1%

18 and over 5.6%

Married-couple families 3.5%

Female-led households 18.5%

Income support

Source	% of households
Social Security	30.4%
Retirement income	30.9%
Supplemental Security	2.5%
Cash public assistance	0.5%
Food stamps / SNAP	3.8%

Health indicators

Condition	%
Obesity	31.6%
High blood pressure	31.6%
High cholesterol	36.5%
Diabetes	9.4%
Heart disease	5.4%
Stroke	2.4%
Asthma	9.4%
Arthritis	23.3%
Kidney disease	2.4%
Pulmonary disease	5.4%
Cancer	6.9%

Behavior / access	%
Smoking	12.6%
Binge drinking	16.8%
No physical activity	18.4%
Less than 7 hrs sleep	30.5%
Depression	19.6%
Fair or poor health	9.8%
Poor mental health	13.1%
Poor physical health	7.8%
No health insurance	8.1%
Visited doctor (checkup)	75.6%
Visited dentist	71.5%
Cholesterol screening	93.2%
Teeth loss	8.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	319	7.1%

Disability	%
Any disability	10.1%
Under 18	7.1%
18–64 years	5.4%
65 and over	29.8%

Health insurance coverage

Type	%
Private insurance	82.7%
Public insurance	30.4%
No insurance	4.6%
Uninsured under 19	0.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	5,383	94.3%
Spanish	170	3.2%
Other Indo-European	162	3.0%
Asian & Pacific Islander	8	0.1%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,265	92.3%
Born in same state	5,180	90.8%
Born in different state	3,131	54.9%
Foreign born	85	1.5%
Naturalized citizen	441	7.7%
Not a US citizen	284	64.4%

Ancestry

Ancestry	Count	%
Italian	989	17.3%
French	700	12.3%
Arab	364	6.4%
Dutch	38	0.7%
English	26	0.5%

Ancestry	Count	%
Irish	14	0.2%
German	8	0.1%
Polish	7	0.1%
Norwegian	6	0.1%

Technology access

Metric	% of households
Computer access	35.5%
Internet access	98.3%

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

Frequently asked questions about ZIP code 21755

What city is ZIP code 21755 in?

ZIP code 21755 is primarily assigned to Jefferson, Maryland.

What county is ZIP code 21755 in?

ZIP code 21755 falls within Frederick County, Maryland.

Is ZIP code 21755 mostly owner-occupied?

88% of occupied units in ZIP code 21755 are owner-occupied, well above the national average.

What is the median household income in ZIP code 21755?

The median household income in ZIP code 21755 is $129,085, above the national median of ~$75,000.

What is the typical home value in ZIP code 21755?

The median home value in ZIP code 21755 is $463,400.

What is the population of ZIP code 21755?

ZIP code 21755 has an estimated population of 5,706 residents, with a density of 166 people per square mile.

What timezone is ZIP code 21755 in?

ZIP code 21755 observes the EST timezone.