PlainZIP

Linthicum Heights, MD · standard

ZIP Code 21090

Anne Arundel County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

9,784
573/sq mi
$138,119
Median income
$410,400
Median home value
42.8%
Bachelor's or higher

The verdict

Linthicum Heights pairs a top-decile household income with upper-quartile home values, in a low-density, homeowner-dominated area.

Top 5%
household income, US ZIPs
Top 20%
home value, US ZIPs
573
people per sq mi
83%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21090 against every reporting US ZIP.

ZIP code 21090 is a mid-sized community (a standard USPS delivery area) in Linthicum Heights, Anne Arundel County, Maryland, home to 9,784 residents across 17.1 square miles, a density of 573 people per square mile, in the New York time zone.

ZIP 21090 skews affluent, with a median household income of $138,119 (21% above the Maryland average), while per-capita income is $55,969. Local economic indicators show a 3.5% poverty rate alongside 2.5% unemployment. Housing costs here run $410,400 for a typical home value (8% below the state average), with rent averaging $2,055 a month; 83.2% of homes are owner-occupied.

A solid share of residents have a four-year degree: 42.8% of adults hold a bachelor's degree or higher, the median age is 36.8, and the average commute is 24 minutes. Beyond these figures, 10 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Anne Arundel County, letting you compare 21090 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 21090

Top 5 sectors by establishment count in Linthicum Heights, MD

Which industries have the most business establishments in ZIP 21090.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 21090, Linthicum Heights, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

9,784

Population

17.1

Area (sq mi)

573

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 21090?

36.8

Median Age

53.0%

Male

47.0%

Female

6.1%

Foreign-Born

White 75.7%
African American 9.0%
Asian 4.6%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 8.5%
Hispanic or Latino 5.7%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$138,119

Median Household Income

+21% vs state

$55,969

Per Capita Income

3.5%

Poverty Rate

2.5%

Unemployment Rate

23.5 min

Mean Commute Time

How ZIP 21090 ranks nationally

Linthicum Heights, MD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$138,119 Top 5% higher than 95% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). This entry sits in this band. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 62.7%
Bachelor's Degree or Higher 42.8%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

4,255

Total Housing Units

3,979

Occupied Units

276

Vacant Units

2.66

Avg Household Size

Occupancy Type

Owner 83.2%
Renter 16.8%

$410,400

Median Home Value

-8% vs state

$2,055

Median Rent

1959

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+8.3%

YoY Change (2024)

264

HPI Index (2000 = 100)

+164%

Total Change Since 2000

Home values in ZIP 21090 have increased 8.3% over the past year (2024). Since 2000, this ZIP has seen +164% cumulative appreciation.

Year Annual Change HPI Index
2020 +3.8% 201
2021 +7.7% 216
2022 +10.5% 239
2023 +2.0% 243
2024 +8.3% 264

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 554 business establishments in ZIP 21090, employing approximately 25,070 people with a combined annual payroll of $2,252,332,000.

554

Businesses

25,070

Employees

$2.3B

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Accommodation and food services 81 14.6%
Professional, scientific, and technical services 71 12.8%
Construction 63 11.4%
Administrative and support and waste management and remediation services 44 7.9%
Health care and social assistance 44 7.9%
Wholesale trade 40 7.2%
Other services (except public administration) 37 6.7%
Finance and insurance 36 6.5%
Retail trade 35 6.3%
Transportation and warehousing 26 4.7%
Management of companies and enterprises 24 4.3%
Real estate and rental and leasing 20 3.6%
Manufacturing 13 2.4%
Information 9 1.6%
Educational services 5 0.9%
Arts, entertainment, and recreation 5 0.9%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 21090 vs 21240 →

ZIP 21090 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 21090 ranks #8 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 21090 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 21090 ranks #2 of 8 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
21240 Baltimore, MD 0 2.4 mi
21227 Halethorpe, MD 33,534 2.2 mi
21225 Brooklyn, MD 33,545 3.1 mi
21077 Harmans, MD 224 4.0 mi
21061 Glen Burnie, MD 53,684 3.9 mi
21250 Baltimore, MD 3,205 3.9 mi
21075 Elkridge, MD 26,344 4.5 mi
21223 Baltimore, MD 26,366 5.2 mi
21076 Hanover, MD 12,952 4.1 mi
21144 Severn, MD 31,884 6.1 mi

More ZIP Codes in Anne Arundel County

21122 standard
Pasadena, MD
Pop: 60,576
21061 standard
Glen Burnie, MD
Pop: 53,684
21401 standard
Annapolis, MD
Pop: 36,012
21144 standard
Severn, MD
Pop: 31,884
21113 standard
Odenton, MD
Pop: 30,469
21403 standard
Annapolis, MD
Pop: 30,269

Related Areas

Anne Arundel County Linthicum Heights, MD Maryland

Frequently Asked Questions

What county is ZIP code 21090 in? ▼
ZIP code 21090 (Linthicum Heights) is located in Anne Arundel County, Maryland. Anne Arundel County contains multiple ZIP codes, see the full list at /counties/anne-arundel-md.
What is the population of ZIP code 21090? ▼
ZIP code 21090 in Linthicum Heights, MD has a population of 9,784 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21090? ▼
The median household income in ZIP 21090 is $138,119, which is 81% above the national average of $76,288.
What is the average home value in ZIP 21090? ▼
The median home value in ZIP 21090 is $410,400, which is 48% above the national average of $278,155.
What is the demographic makeup of ZIP 21090? ▼
The largest racial group in ZIP 21090 is White at 75.7%. Hispanic or Latino residents make up 5.7% of the population.
How many businesses are in ZIP code 21090? ▼
ZIP code 21090 has 554 business establishments employing approximately 25,070 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 21090? ▼
The top industries by establishment count in ZIP 21090 are: Accommodation and food services (81), Professional, scientific, and technical services (71), Construction (63). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 21090? ▼
According to the FHFA House Price Index, home values in ZIP 21090 increased by 8.3% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 164%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 21090? ▼
In ZIP code 21090, 62.7% of residents aged 25+ have a high school diploma or higher, and 42.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 21090? ▼
The mean commute time for workers in ZIP code 21090 is 23.5 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 21090? ▼
In ZIP code 21090, approximately 83.2% of occupied housing units are owner-occupied and 16.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21090? ▼
The poverty rate in ZIP code 21090 is 3.5% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.