21001 ZIP Code — Aberdeen, MD

Harford County, Maryland

ZIP code 21001 is located in Aberdeen, Maryland, within Harford County. It covers approximately 29.96 square miles and serves a population of 25,908 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410/667.

About ZIP code 21001

The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character. Median home value is $251,600. Owner-occupancy sits near the national average at 67%.

Median household income is $76,250. 31% 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 29 minutes is near the national average.

Educational attainment is near the national average, with 29% 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 21001 reflects a community defined by a strong veteran community and a significant Social Security-dependent population.

25,908

population

29.96

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21001 ZIP code map

Cities in ZIP code 21001

Below are the cities the US Postal Service accepts for ZIP code 21001. Using any city not on this list may result in mail delivery delays.

City	Status
Aberdeen	Preferred

Nearby ZIP codes

21017 Belcamp (2.6 mi) 21078 Havre De Grace (4.8 mi) 21005 Aberdeen Proving Ground (4.8 mi) 21009 Abingdon (5 mi) 21028 Churchville (5.1 mi) 21015 Bel Air (6.1 mi) 21040 Edgewood (6.7 mi) 21014 Bel Air (8.6 mi) 21085 Joppa (8.9 mi) 21903 Perryville (9.8 mi) 21034 Darlington (10.4 mi) 21010 Gunpowder (10.4 mi)

Demographics updated 05/2026

Population
Total population	25,908
Population density	865 / sq mi
State FIPS	24
County FIPS	025

Geography
Land area	29.96 sq mi
Water area	1.48 sq mi
Latitude	39.4983
Longitude	-76.1989
Timezone	Eastern (ET)
Area code	443/410/667

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	35.5%	25.4%	28.2%
$50k – $100k	27.5%	28.0%	28.2%
$100k – $200k	31.0%	34.2%	30.1%
Over $200k	6.0%	12.4%	13.4%

Demographics & statistics

25,908

Population

865

People per sq mi

35.8

Median age

$76,250

Median household income

$38,142

Per capita income

$251,600

Median home value

$1,332

Median monthly rent

66.5%

Home ownership

13.7%

Poverty rate

4.8%

Unemployment

7,536

Housing units

28.9%

Bachelor's or higher

Age distribution

Male Female

841

Under 5

898

715

5–9

764

860

10–14

918

710

15–19

759

817

20–24

872

2,174

25–34

2,322

1,396

35–44

1,491

1,465

45–54

1,565

726

55–59

775

887

60–64

947

1,249

65–74

1,334

464

75–84

495

224

85+

240

← Male

Female →

Age summary

Group	Count	%
Under 18	5,933	22.9%
18 and over	19,975	77.1%
65 and over	4,006	15.5%
Median age	35.8 years

Race & ethnicity

White 57.1%

Black or African American 22.4%

Two or more races 6.8%

Hispanic or Latino 6.6%

Other race 3.6%

Asian 3.3%

American Indian / Alaska Native 0.2%

Group	Count	%
White	15,840	57.1%
Black or African American	6,218	22.4%
Two or more races	1,890	6.8%
Hispanic or Latino	1,837	6.6%
Other race	997	3.6%
Asian	907	3.3%
American Indian / Alaska Native	56	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	35.5%	25.4%	28.2%
$50k – $100k	27.5%	28.0%	28.2%
$100k – $200k	31.0%	34.2%	30.1%
Over $200k	6.0%	12.4%	13.4%

Under $10k 7.5%

$10k–$15k 2.2%

$15k–$25k 5.2%

$25k–$35k 8.1%

$35k–$50k 8.9%

$50k–$75k 17.3%

$75k–$100k 13.7%

$100k–$150k 20.7%

$150k–$200k 9.3%

$200k+ 7.2%

Range	% of households
Under $10k	7.5%
$10k–$15k	2.2%
$15k–$25k	5.2%
$25k–$35k	8.1%
$35k–$50k	8.9%
$50k–$75k	17.3%
$75k–$100k	13.7%
$100k–$150k	20.7%
$150k–$200k	9.3%
$200k+	7.2%
Median income	$76,250

Housing

Home values

Under $50k 7.5%

$50k–$100k 2.4%

$100k–$150k 7.5%

$150k–$200k 13.9%

$200k–$300k 35.5%

$300k–$500k 24.0%

$500k–$1M 7.2%

$1M+ 1.9%

Housing overview

Metric	Value
Median home value	$251,600
Median rent / month	$1,332
Owner occupied	66.5%
Renter occupied	33.5%
Vacant	4.9%
Single-family detached	55.9%
Large apartment buildings	6.3%
Mobile homes	5.5%
Median rooms	5.9
Avg household size (owned)	2.66

Year built

Era	%
2020 or later	1.8%
2010–2019	11.7%
2000–2009	14.4%
1990–1999	9.4%
1980–1989	11.6%
1970–1979	10.4%
1960–1969	14.4%
1950–1959	12.2%
1940–1949	6.8%
1939 or earlier	7.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	8.9%
2 bedrooms	28.2%
3 bedrooms	41.4%
4 bedrooms	16.5%
5+ bedrooms	4.4%

Vehicles per household

Vehicles	% of households
No vehicle	7.7%
1 vehicle	35.0%
2 vehicles	35.2%
3 or more	22.1%

Heating fuel

Fuel type	%
Utility gas	44.1%
Electricity	36.7%
Propane / LP gas	4.8%
Fuel oil	11.0%
Wood	0.8%
Solar	0.2%
No fuel used	1.1%

Households & families

Household type	Count	%
Married-couple family	4,740	45.1%
Cohabiting couple	668	6.4%
Male householder, no spouse	1,954	18.6%
Female householder, no spouse	3,154	30.0%
Households with children under 18	3,333	31.7%
Households with seniors (65+)	2,973	28.3%
Average household size	2.46

Marital status

Status	Male	Female
Never married	37.7%	33.3%
Married	49.2%	45.5%
Separated	1.5%	1.2%
Widowed	2.4%	9.1%
Divorced	9.1%	10.8%

Education

Less than 9th grade 2.6%

Some HS, no diploma 7.8%

HS graduate 28.6%

Some college, no degree 20.9%

Associate's degree 11.1%

Bachelor's degree 18.2%

Graduate / professional 10.8%

Metric	%
HS diploma or higher	89.6%
Bachelor's or higher	28.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	392	6.4%
Kindergarten	342	5.6%
Elementary school	2,446	39.7%
High school	1,255	20.4%
College / grad school	1,724	28.0%

Employment

Industry of employment

Education & healthcare 17.7%

Professional & management 14.3%

Retail trade 13.6%

Public administration 12.9%

Construction 7.8%

Transportation & utilities 7.3%

Arts, food & hospitality 7.0%

Manufacturing 6.7%

Other services 5.4%

Finance & real estate 4.0%

Wholesale trade 2.0%

Information 0.9%

Agriculture & mining 0.3%

Occupation

Category	%
Management, business & arts	39.7%
Service	13.7%
Sales & office	19.7%
Natural resources & construction	11.0%
Production & transportation	15.9%

Employment type

Type	%
Private sector	74.9%
Government	20.7%
Self-employed	4.4%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	77.5%
Carpool	10.2%
Public transit	1.5%
Walk	0.7%
Work from home	9.1%
Other means	1.1%
Avg commute (minutes)	29.2

Poverty

All people 13.7%

Under 18 years 22.0%

18 and over 11.2%

Married-couple families 2.3%

Female-led households 33.8%

Income support

Source	% of households
Social Security	30.5%
Retirement income	24.3%
Supplemental Security	5.4%
Cash public assistance	3.2%
Food stamps / SNAP	12.5%

Health indicators

Condition	%
Obesity	36.6%
High blood pressure	38.4%
High cholesterol	33.0%
Diabetes	11.4%
Heart disease	6.4%
Stroke	3.4%
Asthma	10.9%
Arthritis	25.2%
Kidney disease	3.0%
Pulmonary disease	7.2%
Cancer	6.3%

Behavior / access	%
Smoking	18.6%
Binge drinking	14.0%
No physical activity	25.1%
Less than 7 hrs sleep	35.4%
Depression	19.2%
Fair or poor health	15.4%
Poor mental health	15.2%
Poor physical health	10.2%
No health insurance	11.9%
Visited doctor (checkup)	78.8%
Visited dentist	60.3%
Cholesterol screening	90.8%
Teeth loss	13.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,346	11.9%

Disability	%
Any disability	14.7%
Under 18	6.4%
18–64 years	10.6%
65 and over	43.2%

Health insurance coverage

Type	%
Private insurance	71.1%
Public insurance	40.6%
No insurance	5.5%
Uninsured under 19	5.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	24,169	93.3%
Spanish	918	3.8%
Other Indo-European	352	1.5%
Asian & Pacific Islander	164	0.7%
Other languages	284	1.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	23,841	92.0%
Born in same state	23,153	89.4%
Born in different state	14,877	57.4%
Foreign born	688	2.7%
Naturalized citizen	2,067	8.0%
Not a US citizen	1,311	63.4%

Ancestry

Ancestry	Count	%
Italian	3,091	11.9%
French	2,133	8.2%
Arab	1,547	6%
Norwegian	115	0.4%
English	114	0.4%

Ancestry	Count	%
German	62	0.2%
Polish	58	0.2%
Irish	14	0.1%
Dutch	1	0%

Technology access

Metric	% of households
Computer access	40.6%
Internet access	93.4%

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

Frequently asked questions about ZIP code 21001

What city is ZIP code 21001 in?

ZIP code 21001 is primarily assigned to Aberdeen, Maryland.

What county is ZIP code 21001 in?

ZIP code 21001 falls within Harford County, Maryland.

Does ZIP code 21001 have a large veteran population?

12% of civilians in ZIP code 21001 are veterans, above the national average of ~7%.

What is the population of ZIP code 21001?

ZIP code 21001 has an estimated population of 25,908 residents, with a density of 865 people per square mile.

What is the median household income in ZIP code 21001?

The median household income in ZIP code 21001 is $76,250, above the national median of ~$75,000.

What is the typical home value in ZIP code 21001?

The median home value in ZIP code 21001 is $251,600.

What timezone is ZIP code 21001 in?

ZIP code 21001 observes the EST timezone.