21090 ZIP Code — Linthicum Heights, MD

Anne Arundel County, Maryland

ZIP code 21090 is located in Linthicum Heights, Maryland, within Anne Arundel County. It covers approximately 6.64 square miles and serves a population of 10,346 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 410/443.

About ZIP code 21090

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 $371,000. Owner-occupancy is high at 81%, well above the national average.

Median household income is $118,048. The poverty rate of 4% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 23 minutes is near the national average.

Educational attainment is near the national average, with 41% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 11% of civilians, above the national average of 7%.

Overall, ZIP code 21090 reflects a community defined by a strong veteran community and high homeownership.

10,346

population

6.64

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21090 ZIP code map

Cities in ZIP code 21090

Below are the cities the US Postal Service accepts for ZIP code 21090. Using any city not on this list may result in mail delivery delays.

City	Status
Linthicum Heights	Acceptable
Linthicum Heights	Preferred

Nearby ZIP codes

21240 Baltimore (2.2 mi) 21240 Baltimore (2.2 mi) 21227 Halethorpe (2.4 mi) 21225 Brooklyn (3.3 mi) 21061 Glen Burnie (3.4 mi) 21076 Hanover (3.8 mi) 21250 Baltimore (3.8 mi) 21062 Glen Burnie (3.8 mi) 21230 Baltimore (4.7 mi) 21223 Baltimore (5.3 mi) 21229 Baltimore (5.3 mi) 21060 Glen Burnie (5.5 mi)

Demographics updated 05/2026

Population
Total population	10,346
Population density	1,558 / sq mi
State FIPS	24
County FIPS	003

Geography
Land area	6.64 sq mi
Water area	0.08 sq mi
Latitude	39.2063
Longitude	-76.6686
Timezone	Eastern (ET)
Area code	410/443

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.1%	20.1%	28.2%
$50k – $100k	34.8%	27.4%	28.2%
$100k – $200k	37.7%	36.3%	30.1%
Over $200k	8.4%	16.2%	13.4%

Demographics & statistics

10,346

Population

1,558

People per sq mi

38.0

Median age

$118,048

Median household income

$50,282

Per capita income

$371,000

Median home value

$1,813

Median monthly rent

81.0%

Home ownership

4.4%

Poverty rate

2.4%

Unemployment

3,457

Housing units

41.0%

Bachelor's or higher

Age distribution

Male Female

347

Under 5

340

325

5–9

318

270

10–14

264

338

15–19

331

227

20–24

222

884

25–34

865

683

35–44

667

651

45–54

636

286

55–59

279

363

60–64

355

505

65–74

494

193

75–84

189

159

85+

155

← Male

Female →

Age summary

Group	Count	%
Under 18	2,401	23.2%
18 and over	7,945	76.8%
65 and over	1,695	16.4%
Median age	38.0 years

Race & ethnicity

White 81.2%

Black or African American 6.1%

Asian 4.2%

Two or more races 4.1%

Hispanic or Latino 3.4%

Other race 1%

Group	Count	%
White	8,700	81.2%
Black or African American	650	6.1%
Asian	448	4.2%
Two or more races	444	4.1%
Hispanic or Latino	369	3.4%
Other race	104	1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.1%	20.1%	28.2%
$50k – $100k	34.8%	27.4%	28.2%
$100k – $200k	37.7%	36.3%	30.1%
Over $200k	8.4%	16.2%	13.4%

Under $10k 1.1%

$10k–$15k 0.4%

$15k–$25k 2.0%

$25k–$35k 2.9%

$35k–$50k 4.9%

$50k–$75k 10.3%

$75k–$100k 16.1%

$100k–$150k 30.2%

$150k–$200k 18.1%

$200k+ 14.0%

Range	% of households
Under $10k	1.1%
$10k–$15k	0.4%
$15k–$25k	2.0%
$25k–$35k	2.9%
$35k–$50k	4.9%
$50k–$75k	10.3%
$75k–$100k	16.1%
$100k–$150k	30.2%
$150k–$200k	18.1%
$200k+	14.0%
Median income	$118,048

Housing

Home values

Under $50k 1.1%

$100k–$150k 1.2%

$150k–$200k 1.1%

$200k–$300k 19.2%

$300k–$500k 67.6%

$500k–$1M 9.6%

$1M+ 0.1%

Housing overview

Metric	Value
Median home value	$371,000
Median rent / month	$1,813
Owner occupied	81.0%
Renter occupied	19.0%
Vacant	6.6%
Single-family detached	85.7%
Large apartment buildings	8.1%
Mobile homes	0.0%
Median rooms	7.1
Avg household size (owned)	2.73

Year built

Era	%
2020 or later	0.9%
2010–2019	7.4%
2000–2009	3.0%
1990–1999	6.3%
1980–1989	9.5%
1970–1979	6.0%
1960–1969	13.3%
1950–1959	36.2%
1940–1949	5.6%
1939 or earlier	11.6%

Bedrooms

Size	% of units
No bedroom (studio)	2.7%
1 bedroom	5.8%
2 bedrooms	10.6%
3 bedrooms	42.6%
4 bedrooms	32.9%
5+ bedrooms	5.4%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	28.2%
2 vehicles	43.7%
3 or more	25.8%

Heating fuel

Fuel type	%
Utility gas	55.8%
Electricity	32.5%
Propane / LP gas	1.7%
Fuel oil	8.2%
Wood	0.9%
Solar	0.3%
No fuel used	0.7%

Households & families

Household type	Count	%
Married-couple family	2,148	54.7%
Cohabiting couple	253	6.4%
Male householder, no spouse	646	16.5%
Female householder, no spouse	879	22.4%
Households with children under 18	1,093	27.8%
Households with seniors (65+)	1,217	31.0%
Average household size	2.62

Marital status

Status	Male	Female
Never married	33.3%	24.0%
Married	52.2%	52.1%
Separated	0.8%	0.2%
Widowed	2.0%	10.0%
Divorced	11.8%	13.7%

Education

Less than 9th grade 2.0%

Some HS, no diploma 4.1%

HS graduate 21.6%

Some college, no degree 21.3%

Associate's degree 10.2%

Bachelor's degree 24.7%

Graduate / professional 16.3%

Metric	%
HS diploma or higher	94.0%
Bachelor's or higher	41.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	150	5.9%
Kindergarten	72	2.8%
Elementary school	1,047	40.8%
High school	623	24.3%
College / grad school	672	26.2%

Employment

Industry of employment

Education & healthcare 23.3%

Professional & management 18.1%

Manufacturing 10.0%

Arts, food & hospitality 8.7%

Public administration 8.4%

Construction 6.6%

Finance & real estate 6.4%

Transportation & utilities 5.6%

Retail trade 5.2%

Wholesale trade 4.0%

Other services 3.0%

Information 0.8%

Occupation

Category	%
Management, business & arts	56.5%
Service	9.1%
Sales & office	17.2%
Natural resources & construction	7.4%
Production & transportation	9.8%

Employment type

Type	%
Private sector	75.2%
Government	21.1%
Self-employed	3.6%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	78.7%
Carpool	7.0%
Public transit	1.7%
Walk	0.5%
Work from home	11.7%
Other means	0.5%
Avg commute (minutes)	23.4

Poverty

All people 4.4%

Under 18 years 9.3%

18 and over 2.9%

Married-couple families 1.0%

Female-led households 7.5%

Income support

Source	% of households
Social Security	27.9%
Retirement income	27.4%
Supplemental Security	2.6%
Cash public assistance	0.7%
Food stamps / SNAP	3.2%

Health indicators

Condition	%
Obesity	29.8%
High blood pressure	33.7%
High cholesterol	34.9%
Diabetes	8.7%
Heart disease	6.3%
Stroke	2.6%
Asthma	8.6%
Arthritis	25.5%
Kidney disease	2.6%
Pulmonary disease	5.6%
Cancer	7.7%

Behavior / access	%
Smoking	12.4%
Binge drinking	16.0%
No physical activity	19.1%
Less than 7 hrs sleep	31.3%
Depression	18.8%
Fair or poor health	10.2%
Poor mental health	12.7%
Poor physical health	8.4%
No health insurance	8.4%
Visited doctor (checkup)	76.3%
Visited dentist	72.1%
Cholesterol screening	93.1%
Teeth loss	8.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	875	11.1%

Disability	%
Any disability	9.6%
Under 18	2.4%
18–64 years	6.3%
65 and over	32.0%

Health insurance coverage

Type	%
Private insurance	86.8%
Public insurance	25.0%
No insurance	2.2%
Uninsured under 19	0.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	9,659	93.4%
Spanish	194	2.0%
Other Indo-European	102	1.1%
Asian & Pacific Islander	89	0.9%
Other languages	3	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	9,806	94.8%
Born in same state	9,564	92.4%
Born in different state	6,924	66.9%
Foreign born	242	2.3%
Naturalized citizen	540	5.2%
Not a US citizen	408	75.6%

Ancestry

Ancestry	Count	%
Italian	1,877	18.1%
French	1,454	14.1%
Arab	353	3.4%
English	143	1.4%
Irish	86	0.8%

Ancestry	Count	%
German	48	0.5%
Norwegian	43	0.4%
Polish	33	0.3%
Dutch	27	0.3%

Technology access

Metric	% of households
Computer access	37.9%
Internet access	98.0%

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

Frequently asked questions about ZIP code 21090

What city is ZIP code 21090 in?

ZIP code 21090 is primarily assigned to Linthicum Heights, Maryland.

What county is ZIP code 21090 in?

ZIP code 21090 falls within Anne Arundel County, Maryland.

Is ZIP code 21090 mostly owner-occupied?

81% of occupied units in ZIP code 21090 are owner-occupied, well above the national average.

Does ZIP code 21090 have a large veteran population?

11% of civilians in ZIP code 21090 are veterans, above the national average of ~7%.

What is the typical home value in ZIP code 21090?

The median home value in ZIP code 21090 is $371,000.

What is the median household income in ZIP code 21090?

The median household income in ZIP code 21090 is $118,048, above the national median of ~$75,000.

What timezone is ZIP code 21090 in?

ZIP code 21090 observes the EST timezone.