Zip code 21231: Baltimore, Maryland

Q: What city is zip code 21231?

21231 is assigned to Baltimore, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 21231 in?

21231 is in Baltimore city, Maryland.

Q: What is the population of 21231?

About 14,969 people live in 21231, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 21231?

The median household income in 21231 is $85,254.

Q: What zip codes are near 21231?

The closest zip codes to 21231 are 21233, 21287, 21202, 21203, 21235.

Residential delivery areaBaltimore cityEastern Time

Population

14,969

Median household income

$85K

U.S. $81K

Median home value

$350K

U.S. $333K

Median rent

$1,796/mo

U.S. $1,413

Median age

32.7

U.S. 38.9

Land area

0.9 sq mi

17,265 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 21231

21231 is a dense urban zip code in Baltimore, Maryland (Baltimore city), covering 0.9 sq mi of land. About 14,969 people live here, or 17,265 per square mile. The median resident is 32.7 years old, compared with 38.9 nationally.

The median household earns $85,254 a year, close to the national median of $80,734. 20.6% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $350,100, or 4.1 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 34% of occupied homes are lived in by their owners, and renters pay a median of $1,796 a month.

64% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 24.1 minutes each way, and 26% of workers work from home. The most common jobs among working residents are in healthcare; management; and business and finance.

How 21231 compares

Sorted from highest to lowest national percentile

Healthcare workers16.3%
97th
U.S. 9.7% · MD 9%21st of 444 in MD
Population density17,265/sq mi
96th
U.S. 95/sq mi · MD 639/sq mi2nd of 446 in MD
Bachelor's degree or higher64.3%
92nd
StrengthU.S. 35.7% · MD 43.4%47th of 445 in MD
Tech workers6.8%
90th
U.S. 3.8% · MD 6.4%140th of 444 in MD
Work from home25.5%
89th
U.S. 15.1% · MD 19.3%79th of 444 in MD
Per capita income$64,422
88th
StrengthU.S. $44,673 · MD $52,97997th of 446 in MD
Median earnings per worker$70,202
87th
StrengthU.S. $49,666 · MD $61,200162nd of 443 in MD
Poverty rate20.6%
86th
WeaknessU.S. 12.5% · MD 9.4%32nd of 441 in MD
Housing vacancy14.5%
85th
U.S. 10.1% · MD 7.7%89th of 441 in MD
Income inequality (Gini)0.474
78th
U.S. 0.483 · MD 0.45665th of 438 in MD
Median gross rent$1,796
74th
U.S. $1,413 · MD $1,705119th of 338 in MD
Diversity index61
74th
U.S. 61.4 · MD 67.797th of 446 in MD
Broadband access93.2%
59th
U.S. 91% · MD 92.4%224th of 441 in MD
Median household income$85,254
56th
U.S. $80,734 · MD $103,678290th of 414 in MD
Median home value$350,100
53rd
U.S. $332,700 · MD $419,900282nd of 421 in MD
Government workers13.7%
50th
U.S. 14.5% · MD 22.5%376th of 444 in MD
Foreign-born residents9.5%
49th
U.S. 14.1% · MD 16.6%162nd of 446 in MD
Average commute24.1 min
37th
U.S. 26.4 min · MD 31.1 min368th of 421 in MD
Unemployment rate4.2%
37th
U.S. 5.2% · MD 4.9%201st of 444 in MD
Veterans4.7%
35th
U.S. 6.2% · MD 6.8%343rd of 446 in MD
Rent-burdened renters43.3%
24th
U.S. 51.1% · MD 51.5%267th of 404 in MD
Population14,969
23rd
U.S. 334,922,499 · MD 6,206,011151st of 446 in MD
Self-employed workers6.8%
17th
U.S. 10% · MD 8.7%314th of 444 in MD
Uninsured rate3%
12th
StrengthU.S. 8.4% · MD 6.3%269th of 444 in MD
Median age32.7
10th
U.S. 38.9 · MD 39.4419th of 446 in MD
Homeownership rate34.2%
6th
WeaknessU.S. 65.2% · MD 67.6%422nd of 441 in MD
Residents 65 and older9.2%
6th
U.S. 17.2% · MD 16.7%413th of 446 in MD
Residents under 1813.5%
5th
U.S. 22% · MD 22.2%391st of 446 in MD

Measure	21231	Baltimore city	MD	U.S.	National percentile	Rank in MD
Healthcare workers	16.3%	11%	9%	9.7%	97th	21st of 444
Population density	17,265/sq mi	7,082/sq mi	639/sq mi	95/sq mi	96th	2nd of 446
Bachelor's degree or higherStrength	64.3%	36.1%	43.4%	35.7%	92nd	47th of 445
Tech workers	6.8%	4.7%	6.4%	3.8%	90th	140th of 444
Work from home	25.5%	17.8%	19.3%	15.1%	89th	79th of 444
Per capita incomeStrength	$64,422	$40,604	$52,979	$44,673	88th	97th of 446
Median earnings per workerStrength	$70,202	$51,879	$61,200	$49,666	87th	162nd of 443
Poverty rateWeakness	20.6%	19.7%	9.4%	12.5%	86th	32nd of 441
Housing vacancy	14.5%	13.3%	7.7%	10.1%	85th	89th of 441
Income inequality (Gini)	0.474	0.508	0.456	0.483	78th	65th of 438
Median gross rent	$1,796	$1,331	$1,705	$1,413	74th	119th of 338
Diversity index	61	58.1	67.7	61.4	74th	97th of 446
Broadband access	93.2%	85.4%	92.4%	91%	59th	224th of 441
Median household income	$85,254	$62,177	$103,678	$80,734	56th	290th of 414
Median home value	$350,100	$229,600	$419,900	$332,700	53rd	282nd of 421
Government workers	13.7%	20.4%	22.5%	14.5%	50th	376th of 444
Foreign-born residents	9.5%	9.3%	16.6%	14.1%	49th	162nd of 446
Average commute	24.1 min	29.1 min	31.1 min	26.4 min	37th	368th of 421
Unemployment rate	4.2%	6.5%	4.9%	5.2%	37th	201st of 444
Veterans	4.7%	4.7%	6.8%	6.2%	35th	343rd of 446
Rent-burdened renters	43.3%	53.7%	51.5%	51.1%	24th	267th of 404
Population	14,969	573,243	6,206,011	334,922,499	23rd	151st of 446
Self-employed workers	6.8%	6.4%	8.7%	10%	17th	314th of 444
Uninsured rateStrength	3%	5.9%	6.3%	8.4%	12th	269th of 444
Median age	32.7	36.2	39.4	38.9	10th	419th of 446
Homeownership rateWeakness	34.2%	47.5%	67.6%	65.2%	6th	422nd of 441
Residents 65 and older	9.2%	15.3%	16.7%	17.2%	6th	413th of 446
Residents under 18	13.5%	20.9%	22.2%	22%	5th	391st of 446

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

5–17

18–24

33%

25–34

17%

35–44

10%

45–54

55–64

65–74

75+

Median age

32.7

Under 18

13.5%

65 and over

9.2%

Race and ethnicity

White56%
Black27%
Hispanic7%
Asian5%
Native American0.1%
Pacific Islander0%
Other0.6%
Multiracial5%

Diversity index

U.S. 61.4

Foreign-born

9.5%

U.S. 14.1%

Born in state

44.1%

Language spoken at home (households)

English only

82%

Spanish

Other Indo-European

Asian / Pacific

Other

Households

Households: 8,136
Average household size: 1.8
Family households: 35.9%
Married couples: 22.2%
Living alone: 46.2%
Veterans (of adults): 4.7%
Male / female: 49% / 51%

Income and poverty

Household income distribution

<$25k

17%

$25–50k

12%

$50–75k

16%

$75–100k

11%

$100–150k

17%

$150–200k

10%

$200k+

18%

Median household income

21231

$85,254

Baltimore city

$62,177

Maryland

$103,678

United States

$80,734

Per capita income

$64,422

U.S. $44,673

Poverty rate

20.6%

U.S. 12.5%

Households earning $150K+

28.1%

U.S. 23%

Income inequality (Gini)

0.474

U.S. 0.483

Housing

Median home value

21231

$350,100

Baltimore city

$229,600

Maryland

$419,900

United States

$332,700

Median gross rent

21231

$1,796

Baltimore city

$1,331

Maryland

$1,705

United States

$1,413

Types of housing

Single-family

51%

2–4 units

12%

5–19 units

20+ units

28%

Mobile home

0.1%

Boat, RV, van

Housing units: 9,514
Owner-occupied: 34.2%
Vacant: 14.5%
Median year built: 1939 or earlier
Median rooms: 4.2
Renters paying 30%+ of income: 43.3%
Renters paying 50%+ of income: 22.7%
Home value to income: 4.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

46%

Carpooled

Transit

Walked

19%

Bicycle

Worked from home

25%

Other

Commute time (one way)

<10 min

10–19

35%

20–29

25%

30–44

24%

45–59

60+

Average commute

24.1 min

U.S. 26.4 min

Unemployment

4.2%

U.S. 5.2%

In labor force

76.2%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Healthcare

16%

Management

16%

Business and finance

12%

Engineering and science

11%

Education

Computer and math

Sales

Office and admin

Legal and social services

Food service

Transportation and moving

Arts, media and sports

Cleaning and personal care

Production

0.8%

Construction and repair

0.6%

Police and fire

0.4%

Farming, fishing and forestry

Industries

Health care and social assistance

24%

Professional and technical services

17%

Education

15%

Finance, insurance and real estate

Public administration

Manufacturing

Retail

Restaurants and hotels

Other services

Arts and recreation

Admin, support and management

Information

Transportation, warehousing and utilities

Construction

Wholesale

0.7%

Agriculture and mining

0.1%

Median earnings per worker

$70,202

U.S. $49,666

Self-employed

6.8%

U.S. 10%

Government workers

13.7%

U.S. 14.5%

Nonprofit workers

25.4%

U.S. 8.8%

Median earnings by type of work

Type of work	21231	U.S.
Management, business, science and arts	$80,844	$74,888
Service	$31,667	$26,804
Sales and office	$50,321	$40,476
Construction and maintenance	$24,583	$49,199
Production and transportation	$36,921	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

15%

Some college

12%

Associate's

Bachelor's

32%

Graduate

32%

High school graduate or higher: 94.4%
Bachelor's degree or higher: 64.3%
Graduate or professional degree: 31.9%
Households with broadband: 93.2%
Cable, fiber or DSL: 80.1%
No internet access: 3.2%
Without health insurance: 3%
Limited-English households: 2%

Geography

City (USPS): Baltimore
State: Maryland
County: Baltimore city
Center point: 39.2885° N, 76.5920° W
Land area: 0.9 sq mi
Water area: 0.1 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Baltimore100% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 21231

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
21233	Baltimore, MD	0.7 mi	0	—	—
21287	Baltimore, MD	0.8 mi	0	—	—
21202	Baltimore, MD	1 mi	20,683	$59,377	$271,800
21203	Baltimore, MD · PO box	1.5 mi	—	—	—
21235	Baltimore, MD · PO box	1.5 mi	—	—	—
21241	Baltimore, MD · PO box	1.5 mi	—	—	—
21263	Baltimore, MD · PO box	1.5 mi	—	—	—
21264	Baltimore, MD · PO box	1.5 mi	—	—	—
21270	Baltimore, MD · PO box	1.5 mi	—	—	—
21273	Baltimore, MD · PO box	1.5 mi	—	—	—
21275	Baltimore, MD · PO box	1.5 mi	—	—	—
21278	Baltimore, MD · PO box	1.5 mi	—	—	—

Zip codes like 21231 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 21231

What city is zip code 21231?

21231 is assigned to Baltimore, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 21231 in?

21231 is in Baltimore city, Maryland.

What is the population of 21231?

About 14,969 people live in 21231, according to the Census Bureau's American Community Survey.

What time zone is 21231 in?

21231 is in Eastern Time.

What is the median household income in 21231?

The median household income in 21231 is $85,254.

What zip codes are near 21231?

The closest zip codes to 21231 are 21233, 21287, 21202, 21203, 21235.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 21231, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.