21810 ZIP Code — Allen, MD

Wicomico County, Maryland

ZIP code 21810 is located in Allen, Maryland, within Wicomico County. It covers approximately 0.48 square miles and serves a population of 160 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 667.

160

population

0.48

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21810 ZIP code map

Cities in ZIP code 21810

Below are the cities the US Postal Service accepts for ZIP code 21810. Using any city not on this list may result in mail delivery delays.

City	Status
Allen	Acceptable

Demographics updated 05/2026

Population
Total population	160
Population density	333 / sq mi
State FIPS	24
County FIPS	045

Geography
Land area	0.48 sq mi
Water area	0.01 sq mi
Latitude	38.2931
Longitude	-75.6877
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	0.0%	42.5%	28.2%
$50k – $100k	25.3%	31.8%	28.2%
$100k – $200k	67.0%	21.8%	30.1%
Over $200k	7.7%	4.0%	13.4%

Demographics & statistics

160

Population

333

People per sq mi

69.9

Median age

$127,891

Median household income

$51,768

Per capita income

$226,600

Median home value

Median monthly rent

100.0%

Home ownership

0.0%

Poverty rate

0.0%

Unemployment

Housing units

50.6%

Bachelor's or higher

Age distribution

Male Female

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	0	0.0%
18 and over	160	100.0%
65 and over	160	100.0%
Median age	69.9 years

Race & ethnicity

White 90.6%

Two or more races 9.4%

Group	Count	%
White	145	90.6%
Two or more races	15	9.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	0.0%	42.5%	28.2%
$50k – $100k	25.3%	31.8%	28.2%
$100k – $200k	67.0%	21.8%	30.1%
Over $200k	7.7%	4.0%	13.4%

$35k–$50k 18.5%

$100k–$150k 81.5%

Range	% of households
$35k–$50k	18.5%
$100k–$150k	81.5%
Median income	$127,891

Housing

Home values

$100k–$150k 18.5%

$200k–$300k 59.3%

$300k–$500k 22.2%

Housing overview

Metric	Value
Median home value	$226,600
Median rent / month	$0
Owner occupied	100.0%
Renter occupied	0.0%
Vacant	0.0%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	7.0
Avg household size (owned)	1.98

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	59.3%
1980–1989	0.0%
1970–1979	0.0%
1960–1969	0.0%
1950–1959	0.0%
1940–1949	0.0%
1939 or earlier	40.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	59.3%
3 bedrooms	40.7%
4 bedrooms	0.0%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	0.0%
2 vehicles	100.0%
3 or more	0.0%

Heating fuel

Fuel type	%
Electricity	59.3%
Propane / LP gas	40.7%

Households & families

Household type	Count	%
Married-couple family	81	100.0%
Cohabiting couple	0	0.0%
Male householder, no spouse	0	0.0%
Female householder, no spouse	0	0.0%
Households with children under 18	0	0.0%
Households with seniors (65+)	81	100.0%
Average household size	1.98

Marital status

Status	Male	Female
Never married	0.0%	0.0%
Married	100.0%	100.0%
Separated	0.0%	0.0%
Widowed	0.0%	0.0%
Divorced	0.0%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.0%

HS graduate 49.4%

Some college, no degree 0.0%

Associate's degree 0.0%

Bachelor's degree 50.6%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	100.0%
Bachelor's or higher	50.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	0	0.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Education & healthcare 100.0%

Occupation

Category	%
Management, business & arts	100.0%
Service	0.0%
Sales & office	0.0%
Natural resources & construction	0.0%
Production & transportation	0.0%

Employment type

Type	%
Private sector	100.0%
Government	0.0%
Self-employed	0.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	100.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 0.0%

Under 18 years 0.0%

18 and over 0.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	100.0%
Retirement income	40.7%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	36.0%
High blood pressure	40.5%
High cholesterol	36.6%
Diabetes	12.1%
Heart disease	6.2%
Stroke	3.4%
Asthma	10.2%
Arthritis	27.8%
Kidney disease	3.1%
Pulmonary disease	6.1%
Cancer	7.3%

Behavior / access	%
Smoking	14.8%
Binge drinking	15.3%
No physical activity	20.7%
Less than 7 hrs sleep	33.6%
Depression	18.2%
Fair or poor health	12.6%
Poor mental health	13.2%
Poor physical health	8.8%
No health insurance	9.6%
Visited doctor (checkup)	79.8%
Visited dentist	63.6%
Cholesterol screening	93.6%
Teeth loss	11.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	48	30.0%

Disability	%
Any disability	9.4%
Under 18	0.0%
18–64 years	0.0%
65 and over	9.4%

Health insurance coverage

Type	%
Private insurance	78.1%
Public insurance	100.0%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	160	100.0%
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)	160	100.0%
Born in same state	160	100.0%
Born in different state	97	60.6%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	160	100%

Ancestry	Count	%
Italian	35	21.9%

Technology access

Metric	% of households
Computer access	50.6%
Internet access	100.0%

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

Frequently asked questions about ZIP code 21810

What city is ZIP code 21810 in?

ZIP code 21810 is primarily assigned to Allen, Maryland.

What county is ZIP code 21810 in?

ZIP code 21810 falls within Wicomico County, Maryland.

Does ZIP code 21810 have an older population?

100% of residents in ZIP code 21810 are 65 or older, above the national average of ~17%.

Does ZIP code 21810 have a large retiree population?

100% of households in ZIP code 21810 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 21810 have a large veteran population?

30% of civilians in ZIP code 21810 are veterans, above the national average of ~7%.

How educated is the population of ZIP code 21810?

51% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What timezone is ZIP code 21810 in?

ZIP code 21810 observes the EST timezone.