21668 ZIP Code — Sudlersville, MD

Queen Annes County, Maryland

ZIP code 21668 is located in Sudlersville, Maryland, within Queen Annes County. It covers approximately 45.29 square miles and serves a population of 1,842 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 667.

About ZIP code 21668

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $331,800. Owner-occupancy is high at 77%, well above the national average.

The gap between median ($76,250) and mean household income suggests income inequality — a small number of higher earners pull the average up. 43% 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.

College attainment at 16% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (20%) compared to national benchmarks.

Overall, ZIP code 21668 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

1,842

population

45.29

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21668 ZIP code map

Cities in ZIP code 21668

Below are the cities the US Postal Service accepts for ZIP code 21668. Using any city not on this list may result in mail delivery delays.

City	Status
Sudlersville	Preferred

Nearby ZIP codes

21607 Barclay (3.3 mi) 21644 Ingleside (4.3 mi) 21651 Millington (4.9 mi) 21649 Marydel (5.6 mi) 21623 Church Hill (6.3 mi) 21640 Henderson (8 mi) 19953 Hartly (9.7 mi) 21650 Massey (10 mi) 21635 Galena (10.4 mi) 19938 Clayton (10.7 mi) 21690 Chestertown (11 mi) 21620 Chestertown (11.3 mi)

Demographics updated 05/2026

Population
Total population	1,842
Population density	41 / sq mi
State FIPS	24
County FIPS	035

Geography
Land area	45.29 sq mi
Water area	0.01 sq mi
Latitude	39.1785
Longitude	-75.8650
Timezone	Eastern (ET)
Area code	667

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	38.6%	22.7%	28.2%
$50k – $100k	28.7%	27.5%	28.2%
$100k – $200k	28.1%	35.4%	30.1%
Over $200k	4.6%	14.4%	13.4%

Demographics & statistics

1,842

Population

People per sq mi

47.8

Median age

$76,250

Median household income

$40,488

Per capita income

$331,800

Median home value

$1,076

Median monthly rent

76.8%

Home ownership

13.2%

Poverty rate

4.2%

Unemployment

579

Housing units

16.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

108

25–34

129

35–44

122

45–54

147

55–59

117

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	257	14.0%
18 and over	1,585	86.0%
65 and over	348	18.9%
Median age	47.8 years

Race & ethnicity

White 88.1%

Black or African American 4.4%

Hispanic or Latino 2.9%

Other race 2.9%

Two or more races 1.7%

Group	Count	%
White	1,672	88.1%
Black or African American	83	4.4%
Hispanic or Latino	55	2.9%
Other race	55	2.9%
Two or more races	32	1.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	38.6%	22.7%	28.2%
$50k – $100k	28.7%	27.5%	28.2%
$100k – $200k	28.1%	35.4%	30.1%
Over $200k	4.6%	14.4%	13.4%

Under $10k 2.0%

$10k–$15k 3.1%

$15k–$25k 7.0%

$25k–$35k 10.9%

$35k–$50k 5.5%

$50k–$75k 18.2%

$75k–$100k 18.1%

$100k–$150k 9.5%

$150k–$200k 14.3%

$200k+ 11.5%

Range	% of households
Under $10k	2.0%
$10k–$15k	3.1%
$15k–$25k	7.0%
$25k–$35k	10.9%
$35k–$50k	5.5%
$50k–$75k	18.2%
$75k–$100k	18.1%
$100k–$150k	9.5%
$150k–$200k	14.3%
$200k+	11.5%
Median income	$76,250

Housing

Home values

Under $50k 4.7%

$50k–$100k 2.0%

$100k–$150k 1.6%

$150k–$200k 15.3%

$200k–$300k 18.6%

$300k–$500k 41.2%

$500k–$1M 14.2%

$1M+ 2.2%

Housing overview

Metric	Value
Median home value	$331,800
Median rent / month	$1,076
Owner occupied	76.8%
Renter occupied	23.2%
Vacant	4.2%
Single-family detached	79.7%
Large apartment buildings	7.5%
Mobile homes	8.2%
Median rooms	6.7
Avg household size (owned)	2.57

Year built

Era	%
2020 or later	0.5%
2010–2019	3.9%
2000–2009	15.3%
1990–1999	21.6%
1980–1989	12.8%
1970–1979	12.2%
1960–1969	7.0%
1950–1959	1.5%
1940–1949	3.1%
1939 or earlier	22.1%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	11.4%
2 bedrooms	16.0%
3 bedrooms	45.6%
4 bedrooms	24.2%
5+ bedrooms	2.8%

Vehicles per household

Vehicles	% of households
No vehicle	2.2%
1 vehicle	17.6%
2 vehicles	45.7%
3 or more	34.5%

Heating fuel

Fuel type	%
Electricity	54.5%
Propane / LP gas	15.7%
Fuel oil	20.4%
Wood	8.7%
No fuel used	0.7%

Households & families

Household type	Count	%
Married-couple family	384	53.8%
Cohabiting couple	97	13.6%
Male householder, no spouse	62	8.7%
Female householder, no spouse	171	23.9%
Households with children under 18	174	24.4%
Households with seniors (65+)	268	37.5%
Average household size	2.56

Marital status

Status	Male	Female
Never married	37.1%	31.4%
Married	57.0%	48.1%
Separated	0.3%	1.6%
Widowed	0.8%	9.8%
Divorced	4.9%	9.1%

Education

Less than 9th grade 2.5%

Some HS, no diploma 3.4%

HS graduate 48.0%

Some college, no degree 18.7%

Associate's degree 11.2%

Bachelor's degree 10.1%

Graduate / professional 6.2%

Metric	%
HS diploma or higher	94.2%
Bachelor's or higher	16.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	73	19.0%
Kindergarten	0	0.0%
Elementary school	115	29.9%
High school	69	17.9%
College / grad school	128	33.2%

Employment

Industry of employment

Education & healthcare 19.8%

Public administration 13.4%

Construction 12.7%

Retail trade 12.2%

Arts, food & hospitality 10.8%

Professional & management 10.3%

Transportation & utilities 6.6%

Finance & real estate 6.6%

Agriculture & mining 2.6%

Wholesale trade 2.5%

Other services 1.9%

Manufacturing 0.7%

Occupation

Category	%
Management, business & arts	30.0%
Service	19.4%
Sales & office	29.4%
Natural resources & construction	13.3%
Production & transportation	7.9%

Employment type

Type	%
Private sector	72.2%
Government	22.6%
Self-employed	4.8%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	87.8%
Carpool	4.5%
Public transit	0.0%
Walk	0.2%
Work from home	7.5%
Other means	0.0%
Avg commute (minutes)	35.0

Poverty

All people 13.2%

Under 18 years 40.9%

18 and over 8.7%

Married-couple families 2.6%

Female-led households 35.0%

Income support

Source	% of households
Social Security	42.7%
Retirement income	33.3%
Supplemental Security	6.3%
Cash public assistance	4.8%
Food stamps / SNAP	13.3%

Health indicators

Condition	%
Obesity	33.5%
High blood pressure	38.3%
High cholesterol	33.1%
Diabetes	11.3%
Heart disease	7.2%
Stroke	3.5%
Asthma	10.0%
Arthritis	29.5%
Kidney disease	3.2%
Pulmonary disease	8.0%
Cancer	7.2%

Behavior / access	%
Smoking	20.1%
Binge drinking	15.5%
No physical activity	24.7%
Less than 7 hrs sleep	33.6%
Depression	19.4%
Fair or poor health	14.8%
Poor mental health	15.2%
Poor physical health	10.5%
No health insurance	12.3%
Visited doctor (checkup)	73.2%
Visited dentist	63.1%
Cholesterol screening	90.8%
Teeth loss	15.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	56	3.5%

Disability	%
Any disability	18.0%
Under 18	0.8%
18–64 years	16.0%
65 and over	37.9%

Health insurance coverage

Type	%
Private insurance	75.3%
Public insurance	39.4%
No insurance	5.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,797	97.6%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,815	98.5%
Born in same state	1,815	98.5%
Born in different state	1,058	57.4%
Foreign born	0	0.0%
Naturalized citizen	27	1.5%
Not a US citizen	4	14.8%

Ancestry

Ancestry	Count	%
French	513	27.9%
Italian	283	15.4%
Arab	141	7.7%

Ancestry	Count	%
Norwegian	34	1.8%
English	13	0.7%
Irish	11	0.6%

Technology access

Metric	% of households
Computer access	38.8%
Internet access	88.4%

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

Frequently asked questions about ZIP code 21668

What city is ZIP code 21668 in?

ZIP code 21668 is primarily assigned to Sudlersville, Maryland.

What county is ZIP code 21668 in?

ZIP code 21668 falls within Queen Annes County, Maryland.

Does ZIP code 21668 have a large retiree population?

43% of households in ZIP code 21668 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 21668?

The median home value in ZIP code 21668 is $331,800.

What is the population of ZIP code 21668?

ZIP code 21668 has an estimated population of 1,842 residents, with a density of 41 people per square mile.

What is the median household income in ZIP code 21668?

The median household income in ZIP code 21668 is $76,250, above the national median of ~$75,000.

What timezone is ZIP code 21668 in?

ZIP code 21668 observes the EST timezone.