Riva, MD · standard

ZIP Code 21140

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

Reviewed by PlainZIP Editorial Team, ZIP Code Data Editors · June 13, 2026

3,457
987/sq mi: $170,156
Median income: $634,700
Median home value: 49.3%
Bachelor's or higher

The verdict

Riva pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.

Top 2%
household income, US ZIPs: Top 8%
home value, US ZIPs: 987
people per sq mi: 99%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21140 against every reporting US ZIP.

ZIP code 21140 is classified by USPS as a standard delivery area and covers roughly 3.5 square miles in Riva, Anne Arundel County, Maryland. The area is home to 3,457 residents, producing a population density of 987 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 21140 against Maryland and the nation.

On the economic side, the median household income for ZIP 21140 sits at $170,156 (49% above the Maryland average), while per-capita income is $75,559. The poverty rate stands at 1.3% and the unemployment rate at 0.6%. On housing, the median home value is $634,700 (42% above the state average) with median rent at — per month, and 98.7% of occupied units are owner-occupied, a direct signal of whether 21140 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 49.3% of adults hold a bachelor's degree or higher, the median age is 43.6, and the average commute is 34 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Anne Arundel County, so you can benchmark 21140 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →

Top industries in ZIP 21140

Construction

10
Professional, scientific, and technical services

9
Real estate and rental and leasing

7
Administrative and support and waste management and remediation services

6
Health care and social assistance

5

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, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 21140, Riva, MD · 2023 Accessed 2026-06-13 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.

Quick Facts

3,457

Population

3.5

Area (sq mi)

987

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 21140?

43.6

Median Age

51.9%

Male

48.1%

Female

7.7%

Foreign-Born

White 87.1%

African American 0.9%

Asian 1.0%

American Indian or Alaska Native 0.0%

Native Hawaiian or Pacific Islander 0.0%

Two or More Ethnicities 4.1%

Hispanic or Latino 9.0%

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?

$170,156

Median Household Income

+49% vs state

$75,559

Per Capita Income

1.3%

Poverty Rate

0.6%

Unemployment Rate

33.9 min

Mean Commute Time

How ZIP 21140 ranks nationally

Household income vs. every US ZIP code

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

$170,156 Top 2% higher than 98% of 30,318 US ZIPs

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 68.4%

Bachelor's Degree or Higher 49.3%

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

What does housing look like?

1,527

Total Housing Units

1,495

Occupied Units

Vacant Units

2.95

Avg Household Size

Occupancy Type

Owner 98.7%

Renter 1.3%

$634,700

Median Home Value

+42% vs state

1981

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

+7.7%

YoY Change (2024)

285

HPI Index (2000 = 100)

+185%

Total Change Since 2000

Home values in ZIP 21140 have increased 7.7% over the past year (2024). Since 2000, this ZIP has seen +185% cumulative appreciation.

Year	Annual Change	HPI Index
2020	+7.2%	225
2021	+5.2%	237
2022	+8.0%	256
2023	+3.5%	265
2024	+7.7%	285

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 48 business establishments in ZIP 21140, employing approximately 253 people with a combined annual payroll of $12,125,000.

Businesses

253

Employees

$12.1M

Annual Payroll

Industry Sectors

Industry	Establishments	% of Total
Construction	10	20.8%
Professional, scientific, and technical services	9	18.8%
Real estate and rental and leasing	7	14.6%
Administrative and support and waste management and remediation services	6	12.5%
Health care and social assistance	5	10.4%
Wholesale trade	3	6.3%

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 21140 vs 21035 →

21401

36,012
21403

30,269
21037

20,618
21032

8,848
21035

7,815
21402

5,217
21140

3,457
20776

3,289
20778

2,009

What this shows Among its immediate neighbors, ZIP 21140 ranks #7 by population — useful context the national average alone can't give.

20778

$205,974
21035

$188,347
21140

$170,156
21032

$168,653
21405

$160,703
20765

$149,545
20776

$149,300
21037

$145,787
21401

$123,381

What this shows By household income, ZIP 21140 ranks #3 of 9 neighboring ZIPs — local affluence varies block to block, not just metro to metro.

ZIP Code	City	Population	Distance
21035	Davidsonville, MD	7,815	3.0 mi
21401	Annapolis, MD	36,012	3.3 mi
21037	Edgewater, MD	20,618	3.2 mi
21403	Annapolis, MD	30,269	5.0 mi
20776	Harwood, MD	3,289	5.6 mi
21032	Crownsville, MD	8,848	5.9 mi
21405	Annapolis, MD	544	5.8 mi
20778	West River, MD	2,009	7.9 mi
20765	Galesville, MD	514	7.6 mi
21402	Annapolis, MD	5,217	6.6 mi

More ZIP Codes in Anne Arundel County

Anne Arundel County Riva, MD Maryland

Frequently Asked Questions

What county is ZIP code 21140 in? ▼

ZIP code 21140 (Riva) 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 21140? ▼

ZIP code 21140 in Riva, MD has a population of 3,457 according to the Census Bureau ACS 2023 estimates.

What is the median household income in ZIP 21140? ▼

The median household income in ZIP 21140 is $170,156, which is 123% above the national average of $76,288.

What is the average home value in ZIP 21140? ▼

The median home value in ZIP 21140 is $634,700, which is 128% above the national average of $278,155.

What is the demographic makeup of ZIP 21140? ▼

The largest racial group in ZIP 21140 is White at 87.1%. Hispanic or Latino residents make up 9.0% of the population.

How many businesses are in ZIP code 21140? ▼

ZIP code 21140 has 48 business establishments employing approximately 253 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.

What are the main industries in ZIP code 21140? ▼

The top industries by establishment count in ZIP 21140 are: Construction (10), Professional, scientific, and technical services (9), Real estate and rental and leasing (7). There are 6 industry sectors represented in total.

How have home values changed in ZIP code 21140? ▼

According to the FHFA House Price Index, home values in ZIP 21140 increased by 7.7% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 185%. 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 21140? ▼

In ZIP code 21140, 68.4% of residents aged 25+ have a high school diploma or higher, and 49.3% 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 21140? ▼

The mean commute time for workers in ZIP code 21140 is 33.9 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.

What percentage of residents own vs. rent in ZIP 21140? ▼

In ZIP code 21140, approximately 98.7% of occupied housing units are owner-occupied and 1.3% are renter-occupied, based on Census ACS 2023 data.

What is the poverty rate in ZIP code 21140? ▼

The poverty rate in ZIP code 21140 is 1.3% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.