Zip code 21640: Henderson, Maryland

Q: What city is zip code 21640?

21640 is assigned to Henderson, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 21640 in?

21640 is mostly in Caroline County, but it extends into 1 other county.

Q: What is the population of 21640?

About 1,163 people live in 21640, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 21640?

The median household income in 21640 is $53,558.

Q: What zip codes are near 21640?

The closest zip codes to 21640 are 21636, 21644, 21607, 19964, 21670.

Residential delivery areaCaroline CountyEastern Time

Population

1,163

Median household income

$54K

U.S. $81K

Median home value

$269K

U.S. $333K

Median rent

—

U.S. $1,413

Median age

39.9

U.S. 38.9

Land area

26 sq mi

45 people/sq mi

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

About 21640

21640 is a rural zip code in Henderson, Maryland (Caroline County), covering 26 sq mi of land. About 1,163 people live here, or 45 per square mile. The median resident is 39.9 years old, compared with 38.9 nationally.

The median household earns $53,558 a year, 34% below the national median of $80,734. 7.2% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $268,500, or 5.0 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 92% of occupied homes are lived in by their owners.

14% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 36 minutes each way, and 2% of workers work from home. The most common jobs among working residents are in construction and repair; cleaning and personal care; and office and administrative support. 30% of them are self-employed (U.S.: 10%).

How 21640 compares

Sorted from highest to lowest national percentile

Self-employed workers30.2%
99th
U.S. 10% · MD 8.7%15th of 444 in MD
Homeownership rate92.4%
98th
StrengthU.S. 65.2% · MD 67.6%92nd of 441 in MD
Uninsured rate18.6%
94th
WeaknessU.S. 8.4% · MD 6.3%14th of 444 in MD
Average commute36 min
93rd
WeaknessU.S. 26.4 min · MD 31.1 min101st of 421 in MD
Residents 65 and older24.8%
91st
U.S. 17.2% · MD 16.7%84th of 446 in MD
Residents under 1826.6%
84th
U.S. 22% · MD 22.2%62nd of 446 in MD
Healthcare workers11.6%
78th
U.S. 9.7% · MD 9%79th of 444 in MD
Median earnings per worker$53,005
63rd
U.S. $49,666 · MD $61,200292nd of 443 in MD
Median age39.9
56th
U.S. 38.9 · MD 39.4274th of 446 in MD
Foreign-born residents7.1%
39th
U.S. 14.1% · MD 16.6%205th of 446 in MD
Median home value$268,500
37th
U.S. $332,700 · MD $419,900349th of 421 in MD
Diversity index34.7
29th
U.S. 61.4 · MD 67.7270th of 446 in MD
Government workers11.2%
28th
U.S. 14.5% · MD 22.5%402nd of 444 in MD
Poverty rate7.2%
26th
U.S. 12.5% · MD 9.4%207th of 441 in MD
Income inequality (Gini)0.407
26th
U.S. 0.483 · MD 0.456213th of 438 in MD
Per capita income$30,254
20th
WeaknessU.S. $44,673 · MD $52,979414th of 446 in MD
Veterans3.4%
19th
U.S. 6.2% · MD 6.8%392nd of 446 in MD
Housing vacancy3.8%
19th
U.S. 10.1% · MD 7.7%293rd of 441 in MD
Median household income$53,558
12th
WeaknessU.S. $80,734 · MD $103,678397th of 414 in MD
Broadband access83.8%
10th
WeaknessU.S. 91% · MD 92.4%377th of 441 in MD
Bachelor's degree or higher13.9%
7th
WeaknessU.S. 35.7% · MD 43.4%417th of 445 in MD
Population density45/sq mi
6th
U.S. 95/sq mi · MD 639/sq mi402nd of 446 in MD
Unemployment rate2.1%
6th
StrengthU.S. 5.2% · MD 4.9%333rd of 444 in MD
Rent-burdened renters29.2%
4th
StrengthU.S. 51.1% · MD 51.5%331st of 404 in MD
Population1,163
1st
U.S. 334,922,499 · MD 6,206,011342nd of 446 in MD
Work from home1.7%
1st
U.S. 15.1% · MD 19.3%419th of 444 in MD
Tech workers0%
1st
U.S. 3.8% · MD 6.4%391st of 444 in MD

Measure	21640	Caroline	MD	U.S.	National percentile	Rank in MD
Self-employed workers	30.2%	9.5%	8.7%	10%	99th	15th of 444
Homeownership rateStrength	92.4%	71.9%	67.6%	65.2%	98th	92nd of 441
Uninsured rateWeakness	18.6%	7.3%	6.3%	8.4%	94th	14th of 444
Average commuteWeakness	36 min	33.4 min	31.1 min	26.4 min	93rd	101st of 421
Residents 65 and older	24.8%	17.3%	16.7%	17.2%	91st	84th of 446
Residents under 18	26.6%	23.9%	22.2%	22%	84th	62nd of 446
Healthcare workers	11.6%	10%	9%	9.7%	78th	79th of 444
Median earnings per worker	$53,005	$46,014	$61,200	$49,666	63rd	292nd of 443
Median age	39.9	39.9	39.4	38.9	56th	274th of 446
Foreign-born residents	7.1%	6.1%	16.6%	14.1%	39th	205th of 446
Median home value	$268,500	$290,100	$419,900	$332,700	37th	349th of 421
Diversity index	34.7	44.8	67.7	61.4	29th	270th of 446
Government workers	11.2%	17.2%	22.5%	14.5%	28th	402nd of 444
Poverty rate	7.2%	12.2%	9.4%	12.5%	26th	207th of 441
Income inequality (Gini)	0.407	0.425	0.456	0.483	26th	213th of 438
Per capita incomeWeakness	$30,254	$34,341	$52,979	$44,673	20th	414th of 446
Veterans	3.4%	6.2%	6.8%	6.2%	19th	392nd of 446
Housing vacancy	3.8%	7.7%	7.7%	10.1%	19th	293rd of 441
Median household incomeWeakness	$53,558	$68,457	$103,678	$80,734	12th	397th of 414
Broadband accessWeakness	83.8%	88.3%	92.4%	91%	10th	377th of 441
Bachelor's degree or higherWeakness	13.9%	16.2%	43.4%	35.7%	7th	417th of 445
Population density	45/sq mi	105/sq mi	639/sq mi	95/sq mi	6th	402nd of 446
Unemployment rateStrength	2.1%	5.7%	4.9%	5.2%	6th	333rd of 444
Rent-burdened rentersStrength	29.2%	55.8%	51.5%	51.1%	4th	331st of 404
Population	1,163	33,669	6,206,011	334,922,499	1st	342nd of 446
Work from home	1.7%	6.9%	19.3%	15.1%	1st	419th of 444
Tech workers	0%	1.5%	6.4%	3.8%	1st	391st of 444

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

18%

5–17

18–24

12%

25–34

11%

35–44

10%

45–54

13%

55–64

12%

65–74

13%

75+

Median age

39.9

Under 18

26.6%

65 and over

24.8%

Race and ethnicity

White78%
Black0%
Hispanic21%
Asian0%
Native American0%
Pacific Islander0%
Other0%
Multiracial1%

Diversity index

34.7

U.S. 61.4

Foreign-born

7.1%

U.S. 14.1%

Born in state

70.5%

Language spoken at home (households)

English only

87%

Spanish

10%

Other Indo-European

Asian / Pacific

Other

Households

Households: 511
Average household size: 2.3
Family households: 60.3%
Married couples: 35.2%
Living alone: 34.2%
Veterans (of adults): 3.4%
Male / female: 48% / 52%

Income and poverty

Household income distribution

<$25k

25%

$25–50k

19%

$50–75k

15%

$75–100k

17%

$100–150k

17%

$150–200k

$200k+

Median household income

21640

$53,558

Caroline Co.

$68,457

Maryland

$103,678

United States

$80,734

Per capita income

$30,254

U.S. $44,673

Poverty rate

7.2%

U.S. 12.5%

Households earning $150K+

6.7%

U.S. 23%

Income inequality (Gini)

0.407

U.S. 0.483

Housing

Median home value

21640

$268,500

Caroline Co.

$290,100

Maryland

$419,900

United States

$332,700

Median gross rent

21640

—

Caroline Co.

$1,105

Maryland

$1,705

United States

$1,413

Types of housing

Single-family

52%

2–4 units

0.9%

5–19 units

20+ units

Mobile home

47%

Boat, RV, van

Housing units: 531
Owner-occupied: 92.4%
Vacant: 3.8%
Median year built: 1986
Median rooms: 5.9
Renters paying 30%+ of income: 29.2%
Renters paying 50%+ of income: 16.7%
Home value to income: 5.0× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

96%

Carpooled

Transit

Walked

Bicycle

Worked from home

Other

Commute time (one way)

<10 min

10–19

16%

20–29

13%

30–44

40%

45–59

16%

60+

15%

Average commute

36 min

U.S. 26.4 min

Unemployment

2.1%

U.S. 5.2%

In labor force

52.1%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Construction and repair

18%

Cleaning and personal care

17%

Office and admin

14%

Healthcare

12%

Management

10%

Transportation and moving

Sales

Food service

Business and finance

Production

Police and fire

Legal and social services

Education

0.2%

Computer and math

Engineering and science

Arts, media and sports

Farming, fishing and forestry

Industries

Construction

18%

Health care and social assistance

17%

Retail

14%

Admin, support and management

10%

Public administration

Agriculture and mining

Restaurants and hotels

Other services

Manufacturing

Finance, insurance and real estate

Wholesale

Professional and technical services

Education

0.2%

Transportation, warehousing and utilities

Information

Arts and recreation

Median earnings per worker

$53,005

U.S. $49,666

Self-employed

30.2%

U.S. 10%

Government workers

11.2%

U.S. 14.5%

Nonprofit workers

5.9%

U.S. 8.8%

Median earnings by type of work

Type of work	21640	U.S.
Management, business, science and arts	$54,630	$74,888
Service	$24,857	$26,804
Sales and office	$66,375	$40,476
Construction and maintenance	$17,426	$49,199
Production and transportation	$53,200	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

16%

High school

52%

Some college

10%

Associate's

Bachelor's

12%

Graduate

High school graduate or higher: 83.6%
Bachelor's degree or higher: 13.9%
Graduate or professional degree: 1.8%
Households with broadband: 83.8%
Cable, fiber or DSL: 42.3%
No internet access: 16.2%
Without health insurance: 18.6%
Limited-English households: 3.7%

Geography

City (USPS): Henderson
State: Maryland
County: Caroline County
Center point: 39.0681° N, 75.8209° W
Land area: 26 sq mi
Water area: 0.1 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

21640 spans 2 counties

Caroline County80% of land
Queen Anne's County20% of land

Zip codes near 21640

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
21636	Goldsboro, MD	3.9 mi	1,097	$73,426	$320,000
21644	Ingleside, MD	4.4 mi	81	—	—
21607	Barclay, MD	4.9 mi	597	$91,250	$404,500
19964	Marydel, DE	5.5 mi	1,418	$99,402	$329,900
21670	Templeville, MD · PO box	5.5 mi	—	—	—
21649	Marydel, MD	5.7 mi	1,890	$68,542	$222,700
21639	Greensboro, MD	7.8 mi	4,682	$62,772	$269,400
21660	Ridgely, MD	8.6 mi	4,132	$80,469	$359,300
21668	Sudlersville, MD	8.6 mi	2,011	$78,672	$348,400
21623	Church Hill, MD	8.7 mi	2,669	$78,345	$391,400
19953	Hartly, DE	9 mi	5,255	$81,792	$246,700
19934	Camden Wyoming, DE	10 mi	14,061	$87,125	$336,300

Zip codes like 21640 elsewhere

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

Questions about 21640

What city is zip code 21640?

21640 is assigned to Henderson, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 21640 in?

21640 is mostly in Caroline County, but it extends into 1 other county.

What is the population of 21640?

About 1,163 people live in 21640, according to the Census Bureau's American Community Survey.

What time zone is 21640 in?

21640 is in Eastern Time.

What is the median household income in 21640?

The median household income in 21640 is $53,558.

What zip codes are near 21640?

The closest zip codes to 21640 are 21636, 21644, 21607, 19964, 21670.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 21640, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.