Zip code 21664: Secretary, Maryland

Q: What city is zip code 21664?

21664 is assigned to Secretary, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 21664 in?

21664 is in Dorchester County, Maryland.

Q: What is the population of 21664?

About 635 people live in 21664, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 21664?

The median household income in 21664 is $82,721.

Q: What zip codes are near 21664?

The closest zip codes to 21664 are 21631, 21643, 21835, 21673, 21659.

Residential delivery areaDorchester CountyEastern Time

Population

635

Median household income

$83K

U.S. $81K

Median home value

$172K

U.S. $333K

Median rent

$1,175/mo

U.S. $1,413

Median age

U.S. 38.9

Land area

0.3 sq mi

2,182 people/sq mi

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

About 21664

21664 is a suburban zip code in Secretary, Maryland (Dorchester County), covering 0.3 sq mi of land. About 635 people live here, or 2,182 per square mile. The median resident is 34 years old, compared with 38.9 nationally.

The median household earns $82,721 a year, close to the national median of $80,734. 5.5% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $172,000, or 2.1 years of median household income (U.S.: 4.1 years), which makes homes relatively affordable for local earners. 70% of occupied homes are lived in by their owners, and renters pay a median of $1,175 a month.

20% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 25.4 minutes each way, and 3% of workers work from home. The most common jobs among working residents are in office and administrative support; transportation and moving goods; and healthcare.

How 21664 compares

Sorted from highest to lowest national percentile

Residents under 1834.8%
99th
U.S. 22% · MD 22.2%6th of 446 in MD
Housing vacancy15.6%
87th
U.S. 10.1% · MD 7.7%84th of 441 in MD
Healthcare workers12.6%
86th
U.S. 9.7% · MD 9%62nd of 444 in MD
Unemployment rate6.7%
76th
U.S. 5.2% · MD 4.9%87th of 444 in MD
Government workers17.7%
75th
U.S. 14.5% · MD 22.5%312th of 444 in MD
Veterans7%
66th
U.S. 6.2% · MD 6.8%228th of 446 in MD
Population density2,182/sq mi
59th
U.S. 95/sq mi · MD 639/sq mi111th of 446 in MD
Uninsured rate8%
59th
U.S. 8.4% · MD 6.3%66th of 444 in MD
Foreign-born residents11%
54th
U.S. 14.1% · MD 16.6%141st of 446 in MD
Median household income$82,721
53rd
U.S. $80,734 · MD $103,678311th of 414 in MD
Homeownership rate70%
53rd
U.S. 65.2% · MD 67.6%303rd of 441 in MD
Self-employed workers9.5%
53rd
U.S. 10% · MD 8.7%191st of 444 in MD
Average commute25.4 min
46th
U.S. 26.4 min · MD 31.1 min356th of 421 in MD
Diversity index42.7
40th
U.S. 61.4 · MD 67.7218th of 446 in MD
Median earnings per worker$43,529
35th
U.S. $49,666 · MD $61,200378th of 443 in MD
Median gross rent$1,175
34th
U.S. $1,413 · MD $1,705271st of 338 in MD
Residents 65 and older12.8%
22nd
U.S. 17.2% · MD 16.7%370th of 446 in MD
Bachelor's degree or higher20.3%
21st
U.S. 35.7% · MD 43.4%373rd of 445 in MD
Per capita income$29,251
17th
WeaknessU.S. $44,673 · MD $52,979418th of 446 in MD
Broadband access86.6%
17th
WeaknessU.S. 91% · MD 92.4%349th of 441 in MD
Median age34
16th
U.S. 38.9 · MD 39.4406th of 446 in MD
Median home value$172,000
15th
U.S. $332,700 · MD $419,900402nd of 421 in MD
Poverty rate5.5%
15th
StrengthU.S. 12.5% · MD 9.4%263rd of 441 in MD
Rent-burdened renters29.2%
4th
StrengthU.S. 51.1% · MD 51.5%332nd of 404 in MD
Work from home3.4%
3rd
U.S. 15.1% · MD 19.3%410th of 444 in MD
Population635
1st
U.S. 334,922,499 · MD 6,206,011380th of 446 in MD
Tech workers0%
1st
U.S. 3.8% · MD 6.4%403rd of 444 in MD
Income inequality (Gini)0.319
1st
StrengthU.S. 0.483 · MD 0.456392nd of 438 in MD

Measure	21664	Dorchester	MD	U.S.	National percentile	Rank in MD
Residents under 18	34.8%	21%	22.2%	22%	99th	6th of 446
Housing vacancy	15.6%	17.6%	7.7%	10.1%	87th	84th of 441
Healthcare workers	12.6%	10.4%	9%	9.7%	86th	62nd of 444
Unemployment rate	6.7%	5.7%	4.9%	5.2%	76th	87th of 444
Government workers	17.7%	19.8%	22.5%	14.5%	75th	312th of 444
Veterans	7%	7.9%	6.8%	6.2%	66th	228th of 446
Population density	2,182/sq mi	61/sq mi	639/sq mi	95/sq mi	59th	111th of 446
Uninsured rate	8%	5.5%	6.3%	8.4%	59th	66th of 444
Foreign-born residents	11%	4.5%	16.6%	14.1%	54th	141st of 446
Median household income	$82,721	$61,839	$103,678	$80,734	53rd	311th of 414
Homeownership rate	70%	65.6%	67.6%	65.2%	53rd	303rd of 441
Self-employed workers	9.5%	12%	8.7%	10%	53rd	191st of 444
Average commute	25.4 min	26.9 min	31.1 min	26.4 min	46th	356th of 421
Diversity index	42.7	56.2	67.7	61.4	40th	218th of 446
Median earnings per worker	$43,529	$43,263	$61,200	$49,666	35th	378th of 443
Median gross rent	$1,175	$1,032	$1,705	$1,413	34th	271st of 338
Residents 65 and older	12.8%	23%	16.7%	17.2%	22nd	370th of 446
Bachelor's degree or higher	20.3%	19.4%	43.4%	35.7%	21st	373rd of 445
Per capita incomeWeakness	$29,251	$35,605	$52,979	$44,673	17th	418th of 446
Broadband accessWeakness	86.6%	85.8%	92.4%	91%	17th	349th of 441
Median age	34	43.5	39.4	38.9	16th	406th of 446
Median home value	$172,000	$262,400	$419,900	$332,700	15th	402nd of 421
Poverty rateStrength	5.5%	17.1%	9.4%	12.5%	15th	263rd of 441
Rent-burdened rentersStrength	29.2%	56%	51.5%	51.1%	4th	332nd of 404
Work from home	3.4%	7.3%	19.3%	15.1%	3rd	410th of 444
Population	635	32,754	6,206,011	334,922,499	1st	380th of 446
Tech workers	0%	2.1%	6.4%	3.8%	1st	403rd of 444
Income inequality (Gini)Strength	0.319	0.470	0.456	0.483	1st	392nd of 438

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

31%

5–17

18–24

25–34

16%

35–44

10%

45–54

11%

55–64

65–74

75+

Median age

Under 18

34.8%

65 and over

12.8%

Race and ethnicity

White72%
Black1%
Hispanic21%
Asian0%
Native American0%
Pacific Islander0.9%
Other0%
Multiracial4%

Diversity index

42.7

U.S. 61.4

Foreign-born

11%

U.S. 14.1%

Born in state

56.9%

Language spoken at home (households)

English only

86%

Spanish

13%

Other Indo-European

Asian / Pacific

Other

Households

Households: 217
Average household size: 2.9
Family households: 64.5%
Married couples: 49.8%
Living alone: 29%
Veterans (of adults): 7%
Male / female: 47% / 53%

Income and poverty

Household income distribution

<$25k

$25–50k

18%

$50–75k

21%

$75–100k

20%

$100–150k

18%

$150–200k

12%

$200k+

Median household income

21664

$82,721

Dorchester Co.

$61,839

Maryland

$103,678

United States

$80,734

Per capita income

$29,251

U.S. $44,673

Poverty rate

5.5%

U.S. 12.5%

Households earning $150K+

13.8%

U.S. 23%

Income inequality (Gini)

0.319

U.S. 0.483

Housing

Median home value

21664

$172,000

Dorchester Co.

$262,400

Maryland

$419,900

United States

$332,700

Median gross rent

21664

$1,175

Dorchester Co.

$1,032

Maryland

$1,705

United States

$1,413

Types of housing

Single-family

96%

2–4 units

0.8%

5–19 units

20+ units

Mobile home

Boat, RV, van

Housing units: 257
Owner-occupied: 70%
Vacant: 15.6%
Median year built: 1973
Median rooms: 5.4
Renters paying 30%+ of income: 29.2%
Renters paying 50%+ of income: 3.1%
Home value to income: 2.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

86%

Carpooled

Transit

Walked

Bicycle

Worked from home

Other

Commute time (one way)

<10 min

10–19

37%

20–29

16%

30–44

21%

45–59

60+

12%

Average commute

25.4 min

U.S. 26.4 min

Unemployment

6.7%

U.S. 5.2%

In labor force

71.8%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Office and admin

19%

Transportation and moving

13%

Healthcare

13%

Police and fire

10%

Food service

Business and finance

Cleaning and personal care

Construction and repair

Management

Education

Arts, media and sports

Production

Sales

0.7%

Legal and social services

0.3%

Computer and math

Engineering and science

Farming, fishing and forestry

Industries

Health care and social assistance

21%

Admin, support and management

18%

Transportation, warehousing and utilities

10%

Public administration

Restaurants and hotels

Construction

Manufacturing

Education

Retail

Finance, insurance and real estate

Other services

Information

Professional and technical services

Agriculture and mining

Wholesale

0.7%

Arts and recreation

0.3%

Median earnings per worker

$43,529

U.S. $49,666

Self-employed

9.5%

U.S. 10%

Government workers

17.7%

U.S. 14.5%

Nonprofit workers

6.8%

U.S. 8.8%

Median earnings by type of work

Type of work	21664	U.S.
Management, business, science and arts	$49,792	$74,888
Service	$42,986	$26,804
Sales and office	$39,861	$40,476
Construction and maintenance	$58,250	$49,199
Production and transportation	$21,000	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

47%

Some college

14%

Associate's

Bachelor's

Graduate

12%

High school graduate or higher: 90.6%
Bachelor's degree or higher: 20.3%
Graduate or professional degree: 12.3%
Households with broadband: 86.6%
Cable, fiber or DSL: 63.1%
No internet access: 13.4%
Without health insurance: 8%
Limited-English households: 0%

Geography

City (USPS): Secretary
State: Maryland
County: Dorchester County
Center point: 38.6076° N, 75.9471° W
Land area: 0.3 sq mi
Water area: under 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

Secretary100% of zip

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

Zip codes near 21664

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
21631	East New Market, MD	1.8 mi	2,429	$73,864	$306,700
21643	Hurlock, MD	4.9 mi	5,392	$67,219	$230,000
21835	Linkwood, MD	5.1 mi	312	$47,083	$51,100
21673	Trappe, MD	5.7 mi	2,843	$68,194	$363,100
21659	Rhodesdale, MD	8.2 mi	1,601	$73,750	$259,900
21609	Bethlehem, MD · PO box	9.2 mi	—	—	—
21655	Preston, MD	9.7 mi	5,053	$90,385	$289,200
21613	Cambridge, MD	10 mi	17,926	$53,890	$283,900
21654	Oxford, MD	12 mi	1,179	$82,772	$840,000
21632	Federalsburg, MD	13 mi	6,436	$61,316	$216,000
21861	Sharptown, MD	13 mi	920	$86,027	$192,100
21837	Mardela Springs, MD	14 mi	2,891	$62,880	$227,400

Questions about 21664

What city is zip code 21664?

21664 is assigned to Secretary, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 21664 in?

21664 is in Dorchester County, Maryland.

What is the population of 21664?

About 635 people live in 21664, according to the Census Bureau's American Community Survey.

What time zone is 21664 in?

21664 is in Eastern Time.

What is the median household income in 21664?

The median household income in 21664 is $82,721.

What zip codes are near 21664?

The closest zip codes to 21664 are 21631, 21643, 21835, 21673, 21659.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 21664, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.