21555 ZIP Code — Oldtown, MD

Allegany County, Maryland

ZIP code 21555 is located in Oldtown, Maryland, within Allegany County. It covers approximately 98.29 square miles and serves a population of 1,515 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 240/301.

About ZIP code 21555

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $174,300. Owner-occupancy sits near the national average at 74%.

Median household income is $47,917. SNAP benefit usage at 22% of households reflects economic stress in the area. 49% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. An above-average commute of 47 minutes suggests many residents work outside the immediate area.

College attainment at 11% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (21%) compared to national benchmarks.

Notable community characteristics include disability rates above the national average at 23%.

Overall, ZIP code 21555 reflects a community defined by a trades-oriented workforce, a significant Social Security-dependent population, and elevated reliance on food assistance.

1,515

population

98.29

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21555 ZIP code map

Cities in ZIP code 21555

Below are the cities the US Postal Service accepts for ZIP code 21555. Using any city not on this list may result in mail delivery delays.

City	Status
Oldtown	Preferred

Nearby ZIP codes

21530 Flintstone (6.4 mi) 26722 Green Spring (7.7 mi) 21766 Little Orleans (9.3 mi) 25437 Points (9.7 mi) 25434 Paw Paw (9.7 mi) 26763 Springfield (10.6 mi) 26767 Wiley Ford (10.7 mi) 25422 Great Cacapon (11.2 mi) 21502 Cumberland (11.2 mi) 25444 Slanesville (13.5 mi) 26719 Fort Ashby (13.6 mi) 26753 Ridgeley (13.7 mi)

Demographics updated 06/2026

Population
Total population	1,515
Population density	15 / sq mi
State FIPS	24
County FIPS	001

Geography
Land area	98.29 sq mi
Water area	1.98 sq mi
Latitude	39.5923
Longitude	-78.5612
Timezone	Eastern (ET)
Area code	240/301

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	43.3%	49.9%	28.2%
$50k – $100k	36.9%	33.2%	28.2%
$100k – $200k	18.2%	14.9%	30.1%
Over $200k	1.6%	2.0%	13.4%

Demographics & statistics

1,515

Population

People per sq mi

48.4

Median age

$47,917

Median household income

$26,813

Per capita income

$174,300

Median home value

$918

Median monthly rent

74.1%

Home ownership

16.8%

Poverty rate

12.7%

Unemployment

851

Housing units

10.7%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

118

35–44

115

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	325	21.5%
18 and over	1,190	78.5%
65 and over	283	18.7%
Median age	48.4 years

Race & ethnicity

White 98.9%

Two or more races 0.9%

Black or African American 0.2%

Group	Count	%
White	1,498	98.9%
Two or more races	14	0.9%
Black or African American	3	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	43.3%	49.9%	28.2%
$50k – $100k	36.9%	33.2%	28.2%
$100k – $200k	18.2%	14.9%	30.1%
Over $200k	1.6%	2.0%	13.4%

Under $10k 5.4%

$10k–$15k 2.5%

$15k–$25k 6.0%

$25k–$35k 30.9%

$35k–$50k 7.1%

$50k–$75k 12.5%

$75k–$100k 12.4%

$100k–$150k 17.9%

$150k–$200k 5.4%

Range	% of households
Under $10k	5.4%
$10k–$15k	2.5%
$15k–$25k	6.0%
$25k–$35k	30.9%
$35k–$50k	7.1%
$50k–$75k	12.5%
$75k–$100k	12.4%
$100k–$150k	17.9%
$150k–$200k	5.4%
Median income	$47,917

Housing

Home values

Under $50k 10.2%

$50k–$100k 5.1%

$100k–$150k 24.8%

$150k–$200k 32.0%

$200k–$300k 19.8%

$300k–$500k 8.1%

Housing overview

Metric	Value
Median home value	$174,300
Median rent / month	$918
Owner occupied	74.1%
Renter occupied	25.9%
Vacant	33.2%
Single-family detached	81.0%
Large apartment buildings	0.0%
Mobile homes	14.4%
Median rooms	5.9
Avg household size (owned)	2.09

Year built

Era	%
2020 or later	0.0%
2010–2019	1.9%
2000–2009	9.7%
1990–1999	20.8%
1980–1989	6.8%
1970–1979	18.2%
1960–1969	15.0%
1950–1959	13.4%
1940–1949	2.0%
1939 or earlier	12.1%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	13.7%
2 bedrooms	17.9%
3 bedrooms	40.7%
4 bedrooms	22.4%
5+ bedrooms	3.9%

Vehicles per household

Vehicles	% of households
No vehicle	2.6%
1 vehicle	16.9%
2 vehicles	47.2%
3 or more	33.3%

Heating fuel

Fuel type	%
Utility gas	1.5%
Electricity	53.6%
Propane / LP gas	1.6%
Fuel oil	21.8%
Wood	20.4%

Households & families

Household type	Count	%
Married-couple family	479	69.7%
Cohabiting couple	17	2.5%
Male householder, no spouse	110	16.0%
Female householder, no spouse	81	11.8%
Households with children under 18	174	25.3%
Households with seniors (65+)	278	40.5%
Average household size	2.20

Marital status

Status	Male	Female
Never married	20.7%	5.2%
Married	64.0%	79.8%
Separated	7.6%	0.0%
Widowed	1.4%	7.4%
Divorced	6.3%	7.6%

Education

Less than 9th grade 1.6%

Some HS, no diploma 10.5%

HS graduate 57.6%

Some college, no degree 10.2%

Associate's degree 9.5%

Bachelor's degree 6.4%

Graduate / professional 4.3%

Metric	%
HS diploma or higher	87.9%
Bachelor's or higher	10.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	10	3.8%
Elementary school	215	82.1%
High school	37	14.1%
College / grad school	0	0.0%

Employment

Industry of employment

Manufacturing 20.3%

Professional & management 16.7%

Retail trade 15.6%

Education & healthcare 12.2%

Construction 7.0%

Other services 6.8%

Transportation & utilities 6.5%

Finance & real estate 6.5%

Wholesale trade 5.4%

Public administration 2.9%

Occupation

Category	%
Management, business & arts	27.2%
Service	14.2%
Sales & office	11.9%
Natural resources & construction	14.7%
Production & transportation	32.0%

Employment type

Type	%
Private sector	88.3%
Government	8.6%
Self-employed	3.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	88.8%
Carpool	1.8%
Public transit	2.7%
Walk	0.0%
Work from home	4.1%
Other means	2.5%
Avg commute (minutes)	47.1

Poverty

All people 16.8%

Under 18 years 37.8%

18 and over 11.1%

Married-couple families 4.2%

Female-led households 100.0%

Income support

Source	% of households
Social Security	48.5%
Retirement income	18.9%
Supplemental Security	3.8%
Cash public assistance	1.0%
Food stamps / SNAP	21.7%

Health indicators

Condition	%
Obesity	35.0%
High blood pressure	40.7%
High cholesterol	33.7%
Diabetes	12.1%
Heart disease	7.7%
Stroke	3.7%
Asthma	10.7%
Arthritis	31.8%
Kidney disease	3.3%
Pulmonary disease	9.2%
Cancer	7.7%

Behavior / access	%
Smoking	20.5%
Binge drinking	14.2%
No physical activity	27.1%
Less than 7 hrs sleep	33.7%
Depression	24.0%
Fair or poor health	16.9%
Poor mental health	15.5%
Poor physical health	11.6%
No health insurance	11.2%
Visited doctor (checkup)	77.7%
Visited dentist	59.3%
Cholesterol screening	91.3%
Teeth loss	15.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	126	10.6%

Disability	%
Any disability	23.2%
Under 18	8.9%
18–64 years	25.2%
65 and over	32.9%

Health insurance coverage

Type	%
Private insurance	69.1%
Public insurance	49.0%
No insurance	4.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,468	96.9%
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)	1,514	99.9%
Born in same state	1,514	99.9%
Born in different state	1,032	68.1%
Foreign born	0	0.0%
Naturalized citizen	1	0.1%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	163	10.8%
Arab	149	9.8%

Ancestry	Count	%
Italian	82	5.4%
English	17	1.1%

Technology access

Metric	% of households
Computer access	45.3%
Internet access	84.6%

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

Frequently asked questions about ZIP code 21555

What city is ZIP code 21555 in?

ZIP code 21555 is primarily assigned to Oldtown, Maryland.

What county is ZIP code 21555 in?

ZIP code 21555 falls within Allegany County, Maryland.

Does ZIP code 21555 have a large retiree population?

49% of households in ZIP code 21555 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 21555?

11% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the poverty rate in ZIP code 21555?

17% of residents in ZIP code 21555 live below the poverty line, above the national average.

Does ZIP code 21555 have a large veteran population?

11% of civilians in ZIP code 21555 are veterans, above the national average of ~7%.

What timezone is ZIP code 21555 in?

ZIP code 21555 observes the EST timezone.