21920 ZIP Code — Elk Mills, MD

Cecil County, Maryland

ZIP code 21920 is located in Elk Mills, Maryland, within Cecil County. It covers approximately 0.99 square miles and serves a population of 1,089 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410/667.

About ZIP code 21920

The housing stock consists of predominantly single-family detached homes. Much of the housing stock is relatively new, reflecting recent development activity. Median home value is $360,300. Owner-occupancy is high at 82%, well above the national average.

Median household income is $113,687. The poverty rate of 7% is below the national average. 56% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is sales and office, with retail trade as the leading industry. The average commute of 31 minutes is near the national average. Remote work is prevalent — 26% of workers work from home.

College attainment at 20% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 21920 reflects a community defined by high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

1,089

population

0.99

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21920 ZIP code map

Cities in ZIP code 21920

Below are the cities the US Postal Service accepts for ZIP code 21920. Using any city not on this list may result in mail delivery delays.

City	Status
Elk Mills	Acceptable

Demographics updated 05/2026

Population
Total population	1,089
Population density	1,100 / sq mi
State FIPS	24
County FIPS	015

Geography
Land area	0.99 sq mi
Water area	0.01 sq mi
Latitude	39.6610
Longitude	-75.8284
Timezone	Eastern (ET)
Area code	443/410/667

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	37.8%	31.4%	28.2%
$50k – $100k	17.6%	31.8%	28.2%
$100k – $200k	44.7%	29.7%	30.1%
Over $200k	0.0%	7.1%	13.4%

Demographics & statistics

1,089

Population

1,100

People per sq mi

34.6

Median age

$113,687

Median household income

$30,395

Per capita income

$360,300

Median home value

Median monthly rent

81.5%

Home ownership

7.3%

Poverty rate

0.0%

Unemployment

268

Housing units

20.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

112

35–44

45–54

107

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	247	22.7%
18 and over	842	77.3%
65 and over	206	18.9%
Median age	34.6 years

Race & ethnicity

White 70%

Hispanic or Latino 14.8%

Other race 12.4%

Two or more races 2.9%

Group	Count	%
White	894	70%
Hispanic or Latino	189	14.8%
Other race	158	12.4%
Two or more races	37	2.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	37.8%	31.4%	28.2%
$50k – $100k	17.6%	31.8%	28.2%
$100k – $200k	44.7%	29.7%	30.1%
Over $200k	0.0%	7.1%	13.4%

$10k–$15k 3.3%

$15k–$25k 15.8%

$35k–$50k 3.0%

$50k–$75k 7.6%

$75k–$100k 6.1%

$100k–$150k 40.7%

$150k–$200k 21.6%

$200k+ 1.8%

Range	% of households
$10k–$15k	3.3%
$15k–$25k	15.8%
$35k–$50k	3.0%
$50k–$75k	7.6%
$75k–$100k	6.1%
$100k–$150k	40.7%
$150k–$200k	21.6%
$200k+	1.8%
Median income	$113,687

Housing

Home values

$100k–$150k 5.2%

$150k–$200k 4.1%

$200k–$300k 25.4%

$300k–$500k 54.9%

$500k–$1M 7.8%

$1M+ 2.6%

Housing overview

Metric	Value
Median home value	$360,300
Median rent / month	$0
Owner occupied	81.5%
Renter occupied	18.5%
Vacant	0.0%
Single-family detached	86.9%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	8.4
Avg household size (owned)	3.42

Year built

Era	%
2020 or later	0.0%
2010–2019	24.0%
2000–2009	6.7%
1990–1999	15.8%
1980–1989	5.2%
1970–1979	0.0%
1960–1969	21.6%
1950–1959	3.0%
1940–1949	3.0%
1939 or earlier	20.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	26.7%
3 bedrooms	15.8%
4 bedrooms	54.1%
5+ bedrooms	3.3%

Vehicles per household

Vehicles	% of households
No vehicle	4.3%
1 vehicle	7.9%
2 vehicles	48.9%
3 or more	38.9%

Heating fuel

Fuel type	%
Utility gas	13.1%
Electricity	5.2%
Propane / LP gas	22.2%
Fuel oil	59.6%

Households & families

Household type	Count	%
Married-couple family	70	21.3%
Cohabiting couple	43	13.1%
Male householder, no spouse	34	10.3%
Female householder, no spouse	182	55.3%
Households with children under 18	130	39.5%
Households with seniors (65+)	184	55.9%
Average household size	3.31

Marital status

Status	Male	Female
Never married	62.3%	20.0%
Married	35.0%	38.0%
Separated	0.0%	6.9%
Widowed	2.7%	16.8%
Divorced	0.0%	18.2%

Education

Less than 9th grade 0.0%

Some HS, no diploma 28.0%

HS graduate 38.5%

Some college, no degree 3.0%

Associate's degree 10.1%

Bachelor's degree 14.3%

Graduate / professional 6.0%

Metric	%
HS diploma or higher	72.0%
Bachelor's or higher	20.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	27	9.4%
Elementary school	183	63.8%
High school	32	11.1%
College / grad school	45	15.7%

Employment

Industry of employment

Retail trade 29.4%

Manufacturing 22.4%

Other services 18.9%

Professional & management 12.4%

Transportation & utilities 5.5%

Arts, food & hospitality 5.0%

Agriculture & mining 2.4%

Construction 1.9%

Finance & real estate 1.4%

Public administration 0.7%

Occupation

Category	%
Management, business & arts	21.7%
Service	23.9%
Sales & office	31.7%
Natural resources & construction	0.7%
Production & transportation	22.0%

Employment type

Type	%
Private sector	73.7%
Government	5.5%
Self-employed	20.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	70.4%
Carpool	3.3%
Public transit	0.0%
Walk	0.0%
Work from home	26.3%
Other means	0.0%
Avg commute (minutes)	30.6

Poverty

All people 7.3%

Under 18 years 0.0%

18 and over 9.5%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	55.9%
Retirement income	41.0%
Supplemental Security	0.0%
Cash public assistance	5.2%
Food stamps / SNAP	6.4%

Health indicators

Condition	%
Obesity	38.0%
High blood pressure	36.3%
High cholesterol	34.6%
Diabetes	9.7%
Heart disease	5.6%
Stroke	2.8%
Asthma	9.7%
Arthritis	26.3%
Kidney disease	2.5%
Pulmonary disease	6.6%
Cancer	6.6%

Behavior / access	%
Smoking	18.2%
Binge drinking	16.3%
No physical activity	23.6%
Less than 7 hrs sleep	35.5%
Depression	20.4%
Fair or poor health	12.5%
Poor mental health	14.6%
Poor physical health	9.3%
No health insurance	9.4%
Visited doctor (checkup)	74.4%
Visited dentist	65.1%
Cholesterol screening	92.0%
Teeth loss	11.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	32	3.8%

Disability	%
Any disability	9.8%
Under 18	4.9%
18–64 years	9.0%
65 and over	18.4%

Health insurance coverage

Type	%
Private insurance	77.8%
Public insurance	38.6%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,052	96.6%
Spanish	40	3.8%
Other Indo-European	40	3.8%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,002	92.0%
Born in same state	1,002	92.0%
Born in different state	403	37.0%
Foreign born	0	0.0%
Naturalized citizen	87	8.0%
Not a US citizen	87	100.0%

Ancestry

Ancestry	Count	%
French	448	41.1%
Italian	126	11.6%

Ancestry	Count	%
Irish	11	1%
German	7	0.6%

Technology access

Metric	% of households
Computer access	30.2%
Internet access	95.7%

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

Frequently asked questions about ZIP code 21920

What city is ZIP code 21920 in?

ZIP code 21920 is primarily assigned to Elk Mills, Maryland.

What county is ZIP code 21920 in?

ZIP code 21920 falls within Cecil County, Maryland.

Does ZIP code 21920 have a large retiree population?

56% of households in ZIP code 21920 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 21920 mostly owner-occupied?

82% of occupied units in ZIP code 21920 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 21920?

The median home value in ZIP code 21920 is $360,300.

What is the median household income in ZIP code 21920?

The median household income in ZIP code 21920 is $113,687, above the national median of ~$75,000.

What timezone is ZIP code 21920 in?

ZIP code 21920 observes the EST timezone.