21131 ZIP Code — Phoenix, MD

Baltimore County, Maryland

ZIP code 21131 is located in Phoenix, Maryland, within Baltimore County. It covers approximately 21.03 square miles and serves a population of 7,722 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 410/443.

About ZIP code 21131

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $649,400. Owner-occupancy is high at 99%, well above the national average.

The gap between median ($187,500) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average. 35% 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 31 minutes is near the national average.

Educational attainment is high — 73% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 21131 reflects a community defined by a highly educated population, high homeownership, and a significant Social Security-dependent population.

7,722

population

21.03

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21131 ZIP code map

Cities in ZIP code 21131

Below are the cities the US Postal Service accepts for ZIP code 21131. Using any city not on this list may result in mail delivery delays.

City	Status
Phoenix	Acceptable
Phoenix	Preferred

Nearby ZIP codes

21013 Baldwin (4.9 mi) 21057 Glen Arm (5.2 mi) 21111 Monkton (5.4 mi) 21093 Lutherville Timonium (5.6 mi) 21082 Hydes (5.6 mi) 21286 Towson (5.9 mi) 21051 Fork (6.5 mi) 21152 Sparks Glencoe (6.9 mi) 21047 Fallston (7.5 mi) 21204 Towson (7.5 mi) 21234 Parkville (7.8 mi) 21252 Towson (8.2 mi)

Demographics updated 05/2026

Population
Total population	7,722
Population density	367 / sq mi
State FIPS	24
County FIPS	005

Geography
Land area	21.03 sq mi
Water area	1.39 sq mi
Latitude	39.4997
Longitude	-76.5723
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	13.9%	31.4%	28.2%
$50k – $100k	20.9%	30.7%	28.2%
$100k – $200k	31.3%	28.5%	30.1%
Over $200k	33.9%	9.5%	13.4%

Demographics & statistics

7,722

Population

367

People per sq mi

48.4

Median age

$187,500

Median household income

$80,486

Per capita income

$649,400

Median home value

Median monthly rent

98.5%

Home ownership

2.8%

Poverty rate

4.2%

Unemployment

2,744

Housing units

73.0%

Bachelor's or higher

Age distribution

Male Female

196

Under 5

176

203

5–9

182

302

10–14

271

338

15–19

303

121

20–24

108

222

25–34

200

511

35–44

460

638

45–54

574

319

55–59

287

267

60–64

239

569

65–74

511

336

75–84

302

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,760	22.8%
18 and over	5,962	77.2%
65 and over	1,805	23.4%
Median age	48.4 years

Race & ethnicity

White 90.6%

Two or more races 3.8%

Asian 1.6%

Hispanic or Latino 1.5%

Other race 1.1%

Black or African American 0.9%

American Indian / Alaska Native 0.6%

Group	Count	%
White	7,098	90.6%
Two or more races	294	3.8%
Asian	124	1.6%
Hispanic or Latino	115	1.5%
Other race	90	1.1%
Black or African American	67	0.9%
American Indian / Alaska Native	49	0.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	13.9%	31.4%	28.2%
$50k – $100k	20.9%	30.7%	28.2%
$100k – $200k	31.3%	28.5%	30.1%
Over $200k	33.9%	9.5%	13.4%

Under $10k 2.4%

$10k–$15k 1.1%

$15k–$25k 1.1%

$25k–$35k 0.5%

$35k–$50k 4.0%

$50k–$75k 4.1%

$75k–$100k 11.7%

$100k–$150k 11.5%

$150k–$200k 16.4%

$200k+ 47.1%

Range	% of households
Under $10k	2.4%
$10k–$15k	1.1%
$15k–$25k	1.1%
$25k–$35k	0.5%
$35k–$50k	4.0%
$50k–$75k	4.1%
$75k–$100k	11.7%
$100k–$150k	11.5%
$150k–$200k	16.4%
$200k+	47.1%
Median income	$187,500

Housing

Home values

Under $50k 0.5%

$150k–$200k 1.6%

$200k–$300k 2.2%

$300k–$500k 22.8%

$500k–$1M 57.8%

$1M+ 15.0%

Housing overview

Metric	Value
Median home value	$649,400
Median rent / month	$0
Owner occupied	98.5%
Renter occupied	1.5%
Vacant	4.5%
Single-family detached	99.8%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	10.0
Avg household size (owned)	2.92

Year built

Era	%
2020 or later	0.0%
2010–2019	5.0%
2000–2009	11.0%
1990–1999	8.0%
1980–1989	21.8%
1970–1979	21.0%
1960–1969	15.1%
1950–1959	7.1%
1940–1949	4.5%
1939 or earlier	6.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.5%
2 bedrooms	1.5%
3 bedrooms	22.6%
4 bedrooms	55.6%
5+ bedrooms	19.8%

Vehicles per household

Vehicles	% of households
No vehicle	0.6%
1 vehicle	7.6%
2 vehicles	49.5%
3 or more	42.3%

Heating fuel

Fuel type	%
Utility gas	22.9%
Electricity	31.3%
Propane / LP gas	11.3%
Fuel oil	30.4%
Wood	3.3%
No fuel used	0.9%

Households & families

Household type	Count	%
Married-couple family	2,068	77.8%
Cohabiting couple	61	2.3%
Male householder, no spouse	296	11.1%
Female householder, no spouse	233	8.8%
Households with children under 18	956	36.0%
Households with seniors (65+)	1,082	40.7%
Average household size	2.91

Marital status

Status	Male	Female
Never married	23.8%	17.0%
Married	65.6%	69.0%
Separated	0.0%	2.3%
Widowed	1.7%	5.7%
Divorced	8.9%	6.0%

Education

Less than 9th grade 0.6%

Some HS, no diploma 0.9%

HS graduate 13.5%

Some college, no degree 7.0%

Associate's degree 4.9%

Bachelor's degree 36.4%

Graduate / professional 36.6%

Metric	%
HS diploma or higher	98.5%
Bachelor's or higher	73.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	193	9.2%
Kindergarten	36	1.7%
Elementary school	779	37.0%
High school	651	30.9%
College / grad school	446	21.2%

Employment

Industry of employment

Education & healthcare 23.6%

Professional & management 15.6%

Finance & real estate 12.4%

Manufacturing 8.8%

Public administration 8.7%

Arts, food & hospitality 7.8%

Construction 7.7%

Retail trade 6.6%

Wholesale trade 3.3%

Other services 1.9%

Information 1.6%

Transportation & utilities 1.4%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	60.8%
Service	13.7%
Sales & office	19.4%
Natural resources & construction	2.5%
Production & transportation	3.6%

Employment type

Type	%
Private sector	80.5%
Government	13.8%
Self-employed	5.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	70.4%
Carpool	8.7%
Public transit	0.0%
Walk	2.1%
Work from home	18.4%
Other means	0.4%
Avg commute (minutes)	31.4

Poverty

All people 2.8%

Under 18 years 1.6%

18 and over 3.2%

Married-couple families 2.0%

Female-led households 33.7%

Income support

Source	% of households
Social Security	34.7%
Retirement income	30.5%
Supplemental Security	1.9%
Cash public assistance	1.7%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	26.5%
High blood pressure	31.9%
High cholesterol	36.0%
Diabetes	7.6%
Heart disease	5.2%
Stroke	2.2%
Asthma	8.6%
Arthritis	24.8%
Kidney disease	2.4%
Pulmonary disease	4.3%
Cancer	8.2%

Behavior / access	%
Smoking	9.3%
Binge drinking	15.4%
No physical activity	15.3%
Less than 7 hrs sleep	27.2%
Depression	17.6%
Fair or poor health	8.2%
Poor mental health	11.4%
Poor physical health	6.5%
No health insurance	5.6%
Visited doctor (checkup)	77.4%
Visited dentist	77.0%
Cholesterol screening	95.5%
Teeth loss	5.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	395	6.6%

Disability	%
Any disability	7.9%
Under 18	2.4%
18–64 years	4.0%
65 and over	22.2%

Health insurance coverage

Type	%
Private insurance	87.9%
Public insurance	26.5%
No insurance	5.1%
Uninsured under 19	1.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	7,350	95.2%
Spanish	103	1.4%
Other Indo-European	28	0.4%
Asian & Pacific Islander	10	0.1%
Other languages	65	0.9%

Place of birth & citizenship

Origin	Count	%
Native born (US)	7,181	93.0%
Born in same state	7,089	91.8%
Born in different state	4,288	55.5%
Foreign born	92	1.2%
Naturalized citizen	541	7.0%
Not a US citizen	450	83.2%

Ancestry

Ancestry	Count	%
Italian	1,710	22.1%
French	1,510	19.6%
Arab	390	5.1%
Polish	233	3%

Ancestry	Count	%
English	59	0.8%
Norwegian	47	0.6%
Irish	31	0.4%
German	26	0.3%

Technology access

Metric	% of households
Computer access	34.4%
Internet access	99.4%

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

Frequently asked questions about ZIP code 21131

What city is ZIP code 21131 in?

ZIP code 21131 is primarily assigned to Phoenix, Maryland.

What county is ZIP code 21131 in?

ZIP code 21131 falls within Baltimore County, Maryland.

How educated is the population of ZIP code 21131?

73% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 21131 mostly owner-occupied?

99% of occupied units in ZIP code 21131 are owner-occupied, well above the national average.

What is the median household income in ZIP code 21131?

The median household income in ZIP code 21131 is $187,500, above the national median of ~$75,000.

What is the typical home value in ZIP code 21131?

The median home value in ZIP code 21131 is $649,400.

What timezone is ZIP code 21131 in?

ZIP code 21131 observes the EST timezone.