21140 ZIP Code — Riva, MD

Anne Arundel County, Maryland

ZIP code 21140 is located in Riva, Maryland, within Anne Arundel County. It covers approximately 1.42 square miles and serves a population of 4,255 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 410/301.

About ZIP code 21140

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $554,000. Owner-occupancy is high at 97%, well above the national average.

The gap between median ($141,411) and mean household income suggests income inequality — a small number of higher earners pull the average up. 39% 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 35 minutes is near the national average.

Educational attainment is high — 55% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 21140 reflects a community defined by a highly educated population, high homeownership, and a significant Social Security-dependent population.

4,255

population

1.42

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21140 ZIP code map

Cities in ZIP code 21140

Below are the cities the US Postal Service accepts for ZIP code 21140. Using any city not on this list may result in mail delivery delays.

City	Status
Riva	Preferred

Nearby ZIP codes

21037 Edgewater (3 mi) 21035 Davidsonville (3.1 mi) 21401 Annapolis (3.7 mi) 21403 Annapolis (5.2 mi) 21411 Annapolis (5.4 mi) 21412 Annapolis (5.4 mi) 21405 Annapolis (5.6 mi) 21032 Crownsville (5.6 mi) 20776 Harwood (5.7 mi) 21402 Annapolis (6.5 mi) 21114 Crofton (6.6 mi) 21054 Gambrills (6.7 mi)

Demographics updated 06/2026

Population
Total population	4,255
Population density	2,996 / sq mi
State FIPS	24
County FIPS	003

Geography
Land area	1.42 sq mi
Water area	0.34 sq mi
Latitude	38.9498
Longitude	-76.5871
Timezone	Eastern (ET)
Area code	410/301

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.0%	20.1%	28.2%
$50k – $100k	16.4%	27.4%	28.2%
$100k – $200k	33.9%	36.3%	30.1%
Over $200k	30.8%	16.2%	13.4%

Demographics & statistics

4,255

Population

2,996

People per sq mi

43.8

Median age

$141,411

Median household income

$67,252

Per capita income

$554,000

Median home value

$1,879

Median monthly rent

97.0%

Home ownership

1.0%

Poverty rate

1.6%

Unemployment

1,457

Housing units

55.1%

Bachelor's or higher

Age distribution

Male Female

127

Under 5

123

189

5–9

182

206

10–14

199

117

15–19

113

20–24

129

25–34

125

317

35–44

306

298

45–54

287

144

55–59

139

117

60–64

112

371

65–74

357

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,120	26.3%
18 and over	3,135	73.7%
65 and over	980	23.0%
Median age	43.8 years

Race & ethnicity

White 88.6%

Two or more races 4.9%

Hispanic or Latino 4.2%

Other race 1.9%

Black or African American 0.3%

Asian 0.2%

Group	Count	%
White	3,934	88.6%
Two or more races	216	4.9%
Hispanic or Latino	185	4.2%
Other race	85	1.9%
Black or African American	12	0.3%
Asian	8	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.0%	20.1%	28.2%
$50k – $100k	16.4%	27.4%	28.2%
$100k – $200k	33.9%	36.3%	30.1%
Over $200k	30.8%	16.2%	13.4%

Under $10k 0.3%

$15k–$25k 4.0%

$25k–$35k 0.6%

$35k–$50k 5.5%

$50k–$75k 10.5%

$75k–$100k 8.2%

$100k–$150k 23.2%

$150k–$200k 8.7%

$200k+ 39.1%

Range	% of households
Under $10k	0.3%
$15k–$25k	4.0%
$25k–$35k	0.6%
$35k–$50k	5.5%
$50k–$75k	10.5%
$75k–$100k	8.2%
$100k–$150k	23.2%
$150k–$200k	8.7%
$200k+	39.1%
Median income	$141,411

Housing

Home values

$50k–$100k 3.1%

$150k–$200k 5.1%

$200k–$300k 0.6%

$300k–$500k 32.1%

$500k–$1M 49.7%

$1M+ 9.4%

Housing overview

Metric	Value
Median home value	$554,000
Median rent / month	$1,879
Owner occupied	97.0%
Renter occupied	3.0%
Vacant	2.3%
Single-family detached	94.9%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	7.9
Avg household size (owned)	2.92

Year built

Era	%
2020 or later	1.5%
2010–2019	7.5%
2000–2009	4.5%
1990–1999	13.5%
1980–1989	19.3%
1970–1979	36.0%
1960–1969	5.7%
1950–1959	8.5%
1940–1949	0.0%
1939 or earlier	3.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	4.6%
2 bedrooms	9.5%
3 bedrooms	35.0%
4 bedrooms	32.0%
5+ bedrooms	18.9%

Vehicles per household

Vehicles	% of households
No vehicle	1.1%
1 vehicle	21.6%
2 vehicles	48.3%
3 or more	29.0%

Heating fuel

Fuel type	%
Utility gas	46.1%
Electricity	45.2%
Propane / LP gas	2.1%
Fuel oil	6.5%

Households & families

Household type	Count	%
Married-couple family	1,040	70.9%
Cohabiting couple	71	4.8%
Male householder, no spouse	167	11.4%
Female householder, no spouse	189	12.9%
Households with children under 18	531	36.2%
Households with seniors (65+)	596	40.6%
Average household size	2.90

Marital status

Status	Male	Female
Never married	17.5%	15.7%
Married	70.8%	61.5%
Separated	0.8%	0.7%
Widowed	0.7%	6.8%
Divorced	10.2%	15.4%

Education

Less than 9th grade 2.0%

Some HS, no diploma 0.0%

HS graduate 15.5%

Some college, no degree 17.2%

Associate's degree 10.2%

Bachelor's degree 27.8%

Graduate / professional 27.3%

Metric	%
HS diploma or higher	98.0%
Bachelor's or higher	55.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	12	1.1%
Kindergarten	76	6.7%
Elementary school	692	60.8%
High school	143	12.6%
College / grad school	215	18.9%

Employment

Industry of employment

Education & healthcare 26.7%

Public administration 13.8%

Professional & management 13.1%

Construction 11.5%

Finance & real estate 11.0%

Arts, food & hospitality 9.5%

Manufacturing 4.7%

Retail trade 4.5%

Information 1.9%

Transportation & utilities 1.8%

Other services 1.4%

Wholesale trade 0.2%

Occupation

Category	%
Management, business & arts	65.8%
Service	9.6%
Sales & office	13.7%
Natural resources & construction	7.7%
Production & transportation	3.2%

Employment type

Type	%
Private sector	67.8%
Government	28.5%
Self-employed	3.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	74.7%
Carpool	2.8%
Public transit	1.4%
Walk	0.5%
Work from home	18.1%
Other means	2.4%
Avg commute (minutes)	34.5

Poverty

All people 1.0%

Under 18 years 1.0%

18 and over 1.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	39.0%
Retirement income	30.7%
Supplemental Security	4.0%
Cash public assistance	2.0%
Food stamps / SNAP	6.5%

Health indicators

Condition	%
Obesity	29.9%
High blood pressure	31.3%
High cholesterol	34.2%
Diabetes	7.9%
Heart disease	5.1%
Stroke	2.1%
Asthma	8.5%
Arthritis	23.4%
Kidney disease	2.3%
Pulmonary disease	4.6%
Cancer	6.9%

Behavior / access	%
Smoking	10.9%
Binge drinking	16.9%
No physical activity	15.8%
Less than 7 hrs sleep	30.4%
Depression	18.8%
Fair or poor health	8.4%
Poor mental health	12.1%
Poor physical health	7.4%
No health insurance	6.7%
Visited doctor (checkup)	75.9%
Visited dentist	76.0%
Cholesterol screening	94.2%
Teeth loss	5.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	259	8.3%

Disability	%
Any disability	8.0%
Under 18	6.5%
18–64 years	6.3%
65 and over	13.6%

Health insurance coverage

Type	%
Private insurance	89.1%
Public insurance	30.2%
No insurance	1.8%
Uninsured under 19	4.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	4,005	94.1%
Spanish	53	1.3%
Other Indo-European	26	0.6%
Asian & Pacific Islander	27	0.7%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	4,064	95.5%
Born in same state	3,978	93.5%
Born in different state	2,197	51.6%
Foreign born	86	2.0%
Naturalized citizen	191	4.5%
Not a US citizen	156	81.7%

Ancestry

Ancestry	Count	%
French	641	15.1%
Italian	600	14.1%
Arab	357	8.4%
Polish	36	0.8%

Ancestry	Count	%
Dutch	33	0.8%
Irish	31	0.7%
English	10	0.2%
Norwegian	9	0.2%

Technology access

Metric	% of households
Computer access	34.5%
Internet access	98.0%

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

Frequently asked questions about ZIP code 21140

What city is ZIP code 21140 in?

ZIP code 21140 is primarily assigned to Riva, Maryland.

What county is ZIP code 21140 in?

ZIP code 21140 falls within Anne Arundel County, Maryland.

Is ZIP code 21140 mostly owner-occupied?

97% of occupied units in ZIP code 21140 are owner-occupied, well above the national average.

How educated is the population of ZIP code 21140?

55% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Does ZIP code 21140 have a large retiree population?

39% of households in ZIP code 21140 receive Social Security income, suggesting a significant retiree or disability population.

What is the median household income in ZIP code 21140?

The median household income in ZIP code 21140 is $141,411, above the national median of ~$75,000.

What timezone is ZIP code 21140 in?

ZIP code 21140 observes the EST timezone.