21155 ZIP Code — Upperco, MD

Baltimore County, Maryland

ZIP code 21155 is located in Upperco, Maryland, within Baltimore County. It covers approximately 22.13 square miles and serves a population of 3,063 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410.

About ZIP code 21155

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 $500,400. Owner-occupancy is high at 81%, well above the national average.

The gap between median ($129,231) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 7% is below the national average. 37% 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 31 minutes is near the national average.

Educational attainment is high — 48% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 21155 reflects a community defined by high homeownership and a significant Social Security-dependent population.

3,063

population

22.13

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21155 ZIP code map

Cities in ZIP code 21155

Below are the cities the US Postal Service accepts for ZIP code 21155. Using any city not on this list may result in mail delivery delays.

City	Status
Upperco	Acceptable
Upperco	Preferred

Nearby ZIP codes

21074 Hampstead (4 mi) 21136 Reisterstown (5.8 mi) 21136 Reisterstown (5.8 mi) 21152 Sparks Glencoe (6.6 mi) 21048 Finksburg (7.8 mi) 21102 Manchester (7.8 mi) 21120 Parkton (8.6 mi) 21053 Freeland (9.2 mi) 21117 Owings Mills (9.6 mi) 21157 Westminster (9.9 mi) 21111 Monkton (11.3 mi) 21158 Westminster (12.6 mi)

Demographics updated 05/2026

Population
Total population	3,063
Population density	138 / sq mi
State FIPS	24
County FIPS	005

Geography
Land area	22.13 sq mi
Water area	0.06 sq mi
Latitude	39.5692
Longitude	-76.8054
Timezone	Eastern (ET)
Area code	443/410

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.0%	31.4%	28.2%
$50k – $100k	23.7%	30.7%	28.2%
$100k – $200k	36.6%	28.5%	30.1%
Over $200k	20.8%	9.5%	13.4%

Demographics & statistics

3,063

Population

138

People per sq mi

36.3

Median age

$129,231

Median household income

$59,433

Per capita income

$500,400

Median home value

$1,385

Median monthly rent

80.6%

Home ownership

6.9%

Poverty rate

1.9%

Unemployment

949

Housing units

47.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

125

5–9

124

10–14

15–19

20–24

282

25–34

282

127

35–44

126

191

45–54

191

103

55–59

102

60–64

101

133

65–74

132

110

75–84

109

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	736	24.0%
18 and over	2,327	76.0%
65 and over	520	17.0%
Median age	36.3 years

Race & ethnicity

White 94.8%

Black or African American 1.7%

Asian 1.3%

Two or more races 1.1%

Hispanic or Latino 0.6%

Other race 0.6%

Group	Count	%
White	2,919	94.8%
Black or African American	53	1.7%
Asian	39	1.3%
Two or more races	35	1.1%
Hispanic or Latino	17	0.6%
Other race	17	0.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.0%	31.4%	28.2%
$50k – $100k	23.7%	30.7%	28.2%
$100k – $200k	36.6%	28.5%	30.1%
Over $200k	20.8%	9.5%	13.4%

$10k–$15k 0.5%

$15k–$25k 9.0%

$25k–$35k 2.1%

$35k–$50k 6.1%

$50k–$75k 8.4%

$75k–$100k 13.2%

$100k–$150k 12.1%

$150k–$200k 13.5%

$200k+ 35.1%

Range	% of households
$10k–$15k	0.5%
$15k–$25k	9.0%
$25k–$35k	2.1%
$35k–$50k	6.1%
$50k–$75k	8.4%
$75k–$100k	13.2%
$100k–$150k	12.1%
$150k–$200k	13.5%
$200k+	35.1%
Median income	$129,231

Housing

Home values

Under $50k 1.1%

$200k–$300k 10.9%

$300k–$500k 38.0%

$500k–$1M 44.5%

$1M+ 5.6%

Housing overview

Metric	Value
Median home value	$500,400
Median rent / month	$1,385
Owner occupied	80.6%
Renter occupied	19.4%
Vacant	10.6%
Single-family detached	84.6%
Large apartment buildings	0.0%
Mobile homes	5.7%
Median rooms	7.3
Avg household size (owned)	3.06

Year built

Era	%
2020 or later	1.9%
2010–2019	6.6%
2000–2009	9.8%
1990–1999	11.8%
1980–1989	10.8%
1970–1979	14.5%
1960–1969	7.8%
1950–1959	3.1%
1940–1949	1.8%
1939 or earlier	31.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.5%
2 bedrooms	7.5%
3 bedrooms	48.0%
4 bedrooms	29.4%
5+ bedrooms	9.7%

Vehicles per household

Vehicles	% of households
No vehicle	1.9%
1 vehicle	18.0%
2 vehicles	30.0%
3 or more	50.1%

Heating fuel

Fuel type	%
Utility gas	4.6%
Electricity	30.8%
Propane / LP gas	13.5%
Fuel oil	46.9%
Wood	1.0%
No fuel used	3.3%

Households & families

Household type	Count	%
Married-couple family	585	57.0%
Cohabiting couple	65	6.3%
Male householder, no spouse	191	18.6%
Female householder, no spouse	185	18.0%
Households with children under 18	342	33.3%
Households with seniors (65+)	338	32.9%
Average household size	2.99

Marital status

Status	Male	Female
Never married	32.1%	28.8%
Married	55.2%	53.4%
Separated	1.2%	1.7%
Widowed	6.6%	4.8%
Divorced	4.9%	11.3%

Education

Less than 9th grade 1.7%

Some HS, no diploma 0.1%

HS graduate 27.3%

Some college, no degree 16.7%

Associate's degree 6.6%

Bachelor's degree 27.7%

Graduate / professional 19.8%

Metric	%
HS diploma or higher	98.1%
Bachelor's or higher	47.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	49	6.8%
Kindergarten	46	6.4%
Elementary school	321	44.6%
High school	175	24.3%
College / grad school	128	17.8%

Employment

Industry of employment

Education & healthcare 23.7%

Manufacturing 11.4%

Finance & real estate 9.5%

Professional & management 9.4%

Public administration 9.3%

Other services 8.4%

Retail trade 8.2%

Arts, food & hospitality 7.6%

Construction 5.9%

Information 2.9%

Transportation & utilities 2.0%

Wholesale trade 0.9%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	52.7%
Service	15.3%
Sales & office	15.6%
Natural resources & construction	7.4%
Production & transportation	9.0%

Employment type

Type	%
Private sector	77.8%
Government	17.4%
Self-employed	4.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	83.0%
Carpool	3.7%
Public transit	0.0%
Walk	1.4%
Work from home	11.4%
Other means	0.5%
Avg commute (minutes)	31.0

Poverty

All people 6.9%

Under 18 years 14.9%

18 and over 4.4%

Married-couple families 1.9%

Female-led households 56.3%

Income support

Source	% of households
Social Security	36.6%
Retirement income	22.4%
Supplemental Security	1.9%
Cash public assistance	0.0%
Food stamps / SNAP	7.5%

Health indicators

Condition	%
Obesity	28.8%
High blood pressure	35.1%
High cholesterol	37.9%
Diabetes	9.0%
Heart disease	6.3%
Stroke	2.8%
Asthma	9.1%
Arthritis	28.0%
Kidney disease	2.8%
Pulmonary disease	5.9%
Cancer	8.7%

Behavior / access	%
Smoking	12.2%
Binge drinking	14.9%
No physical activity	19.1%
Less than 7 hrs sleep	28.4%
Depression	18.7%
Fair or poor health	10.8%
Poor mental health	12.7%
Poor physical health	8.1%
No health insurance	7.8%
Visited doctor (checkup)	77.8%
Visited dentist	71.7%
Cholesterol screening	94.3%
Teeth loss	7.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	143	6.1%

Disability	%
Any disability	15.1%
Under 18	18.9%
18–64 years	8.0%
65 and over	34.4%

Health insurance coverage

Type	%
Private insurance	74.5%
Public insurance	34.1%
No insurance	5.4%
Uninsured under 19	8.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,891	94.4%
Spanish	61	2.1%
Other Indo-European	17	0.6%
Asian & Pacific Islander	44	1.5%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,911	95.0%
Born in same state	2,860	93.4%
Born in different state	2,076	67.8%
Foreign born	51	1.7%
Naturalized citizen	152	5.0%
Not a US citizen	5	3.3%

Ancestry

Ancestry	Count	%
Arab	774	25.3%
French	549	17.9%
Italian	385	12.6%
Polish	43	1.4%

Ancestry	Count	%
German	26	0.8%
English	22	0.7%
Irish	11	0.4%
Dutch	10	0.3%

Technology access

Metric	% of households
Computer access	33.5%
Internet access	93.9%

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

Frequently asked questions about ZIP code 21155

What city is ZIP code 21155 in?

ZIP code 21155 is primarily assigned to Upperco, Maryland.

What county is ZIP code 21155 in?

ZIP code 21155 falls within Baltimore County, Maryland.

Is ZIP code 21155 mostly owner-occupied?

81% of occupied units in ZIP code 21155 are owner-occupied, well above the national average.

How educated is the population of ZIP code 21155?

48% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Does ZIP code 21155 have a large retiree population?

37% of households in ZIP code 21155 receive Social Security income, suggesting a significant retiree or disability population.

What is the median household income in ZIP code 21155?

The median household income in ZIP code 21155 is $129,231, above the national median of ~$75,000.

What timezone is ZIP code 21155 in?

ZIP code 21155 observes the EST timezone.