21120 ZIP Code — Parkton, MD

Baltimore County, Maryland

ZIP code 21120 is located in Parkton, Maryland, within Baltimore County. It covers approximately 42.00 square miles and serves a population of 7,319 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410.

About ZIP code 21120

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $527,100. Owner-occupancy is high at 96%, well above the national average.

The gap between median ($148,090) and mean household income suggests income inequality — a small number of higher earners pull the average up.

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.

Educational attainment is high — 61% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 21120 reflects a community defined by a highly educated population and high homeownership.

7,319

population

42.00

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21120 ZIP code map

Cities in ZIP code 21120

Below are the cities the US Postal Service accepts for ZIP code 21120. Using any city not on this list may result in mail delivery delays.

City	Status
Parkton	Acceptable
Parkton	Preferred

Nearby ZIP codes

21053 Freeland (3.2 mi) 21161 White Hall (5.6 mi) 21111 Monkton (6.8 mi) 21152 Sparks Glencoe (6.9 mi) 17361 Shrewsbury (8.3 mi) 21155 Upperco (8.6 mi) 21102 Manchester (8.8 mi) 17349 New Freedom (8.9 mi) 21074 Hampstead (9.5 mi) 17363 Stewartstown (9.9 mi) 17327 Glen Rock (10.5 mi) 21131 Phoenix (11.7 mi)

Demographics updated 05/2026

Population
Total population	7,319
Population density	174 / sq mi
State FIPS	24
County FIPS	005

Geography
Land area	42.00 sq mi
Water area	0.72 sq mi
Latitude	39.6475
Longitude	-76.6796
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	10.5%	31.4%	28.2%
$50k – $100k	24.8%	30.7%	28.2%
$100k – $200k	39.6%	28.5%	30.1%
Over $200k	25.2%	9.5%	13.4%

Demographics & statistics

7,319

Population

174

People per sq mi

44.0

Median age

$148,090

Median household income

$64,523

Per capita income

$527,100

Median home value

$1,630

Median monthly rent

95.9%

Home ownership

1.5%

Poverty rate

4.2%

Unemployment

2,535

Housing units

60.8%

Bachelor's or higher

Age distribution

Male Female

257

Under 5

238

269

5–9

250

329

10–14

305

235

15–19

219

20–24

298

25–34

277

507

35–44

470

569

45–54

528

313

55–59

291

331

60–64

307

437

65–74

406

131

75–84

121

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,969	26.9%
18 and over	5,350	73.1%
65 and over	1,204	16.5%
Median age	44.0 years

Race & ethnicity

White 85.3%

Hispanic or Latino 4.2%

Two or more races 4.1%

Asian 2.7%

Black or African American 2%

Other race 1.6%

Group	Count	%
White	6,520	85.3%
Hispanic or Latino	323	4.2%
Two or more races	314	4.1%
Asian	207	2.7%
Black or African American	156	2%
Other race	122	1.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	10.5%	31.4%	28.2%
$50k – $100k	24.8%	30.7%	28.2%
$100k – $200k	39.6%	28.5%	30.1%
Over $200k	25.2%	9.5%	13.4%

$15k–$25k 0.9%

$25k–$35k 3.8%

$35k–$50k 3.3%

$50k–$75k 8.2%

$75k–$100k 10.7%

$100k–$150k 26.2%

$150k–$200k 12.7%

$200k+ 34.1%

Range	% of households
$15k–$25k	0.9%
$25k–$35k	3.8%
$35k–$50k	3.3%
$50k–$75k	8.2%
$75k–$100k	10.7%
$100k–$150k	26.2%
$150k–$200k	12.7%
$200k+	34.1%
Median income	$148,090

Housing

Home values

Under $50k 0.3%

$50k–$100k 0.4%

$100k–$150k 1.0%

$200k–$300k 7.4%

$300k–$500k 36.4%

$500k–$1M 48.6%

$1M+ 5.9%

Housing overview

Metric	Value
Median home value	$527,100
Median rent / month	$1,630
Owner occupied	95.9%
Renter occupied	4.1%
Vacant	3.3%
Single-family detached	97.4%
Large apartment buildings	0.0%
Mobile homes	0.3%
Median rooms	10.0
Avg household size (owned)	2.87

Year built

Era	%
2020 or later	1.8%
2010–2019	6.9%
2000–2009	19.1%
1990–1999	17.6%
1980–1989	18.8%
1970–1979	13.9%
1960–1969	6.0%
1950–1959	6.1%
1940–1949	0.3%
1939 or earlier	9.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.5%
2 bedrooms	4.7%
3 bedrooms	30.9%
4 bedrooms	48.9%
5+ bedrooms	15.0%

Vehicles per household

Vehicles	% of households
No vehicle	1.0%
1 vehicle	11.1%
2 vehicles	50.7%
3 or more	37.2%

Heating fuel

Fuel type	%
Utility gas	1.9%
Electricity	37.4%
Propane / LP gas	21.0%
Fuel oil	25.7%
Wood	4.2%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	1,952	76.4%
Cohabiting couple	175	6.9%
Male householder, no spouse	158	6.2%
Female householder, no spouse	269	10.5%
Households with children under 18	954	37.4%
Households with seniors (65+)	773	30.3%
Average household size	2.85

Marital status

Status	Male	Female
Never married	18.4%	16.0%
Married	70.1%	71.7%
Separated	0.4%	0.0%
Widowed	3.3%	3.5%
Divorced	7.8%	8.8%

Education

Less than 9th grade 1.0%

Some HS, no diploma 1.4%

HS graduate 15.3%

Some college, no degree 15.4%

Associate's degree 6.1%

Bachelor's degree 35.3%

Graduate / professional 25.6%

Metric	%
HS diploma or higher	97.6%
Bachelor's or higher	60.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	302	14.7%
Kindergarten	125	6.1%
Elementary school	878	42.7%
High school	454	22.1%
College / grad school	297	14.4%

Employment

Industry of employment

Education & healthcare 26.3%

Professional & management 16.8%

Finance & real estate 10.3%

Manufacturing 9.0%

Retail trade 7.7%

Arts, food & hospitality 7.4%

Construction 6.3%

Other services 5.2%

Transportation & utilities 4.2%

Public administration 3.3%

Wholesale trade 1.3%

Information 1.3%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	60.9%
Service	8.9%
Sales & office	18.4%
Natural resources & construction	6.3%
Production & transportation	5.5%

Employment type

Type	%
Private sector	81.5%
Government	15.9%
Self-employed	2.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	71.6%
Carpool	7.5%
Public transit	1.4%
Walk	0.2%
Work from home	18.9%
Other means	0.4%
Avg commute (minutes)	34.8

Poverty

All people 1.5%

Under 18 years 3.6%

18 and over 0.7%

Married-couple families 0.3%

Female-led households 0.0%

Income support

Source	% of households
Social Security	29.1%
Retirement income	28.0%
Supplemental Security	0.3%
Cash public assistance	0.2%
Food stamps / SNAP	0.2%

Health indicators

Condition	%
Obesity	28.7%
High blood pressure	32.4%
High cholesterol	35.1%
Diabetes	8.0%
Heart disease	5.4%
Stroke	2.4%
Asthma	9.2%
Arthritis	25.4%
Kidney disease	2.5%
Pulmonary disease	5.2%
Cancer	7.5%

Behavior / access	%
Smoking	12.8%
Binge drinking	16.2%
No physical activity	18.4%
Less than 7 hrs sleep	29.6%
Depression	19.1%
Fair or poor health	10.1%
Poor mental health	13.2%
Poor physical health	7.6%
No health insurance	7.4%
Visited doctor (checkup)	76.2%
Visited dentist	72.1%
Cholesterol screening	94.2%
Teeth loss	7.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	351	6.6%

Disability	%
Any disability	7.6%
Under 18	1.5%
18–64 years	5.7%
65 and over	23.8%

Health insurance coverage

Type	%
Private insurance	92.5%
Public insurance	18.0%
No insurance	1.4%
Uninsured under 19	1.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	6,824	93.2%
Spanish	33	0.5%
Other Indo-European	10	0.1%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	7,075	96.7%
Born in same state	6,995	95.6%
Born in different state	4,994	68.2%
Foreign born	80	1.1%
Naturalized citizen	244	3.3%
Not a US citizen	202	82.8%

Ancestry

Ancestry	Count	%
Italian	1,404	19.2%
French	1,251	17.1%
Norwegian	181	2.5%

Ancestry	Count	%
Arab	170	2.3%
Irish	72	1%
Polish	47	0.6%

Technology access

Metric	% of households
Computer access	34.9%
Internet access	98.7%

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

Frequently asked questions about ZIP code 21120

What city is ZIP code 21120 in?

ZIP code 21120 is primarily assigned to Parkton, Maryland.

What county is ZIP code 21120 in?

ZIP code 21120 falls within Baltimore County, Maryland.

Is ZIP code 21120 mostly owner-occupied?

96% of occupied units in ZIP code 21120 are owner-occupied, well above the national average.

How educated is the population of ZIP code 21120?

61% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 21120?

The median household income in ZIP code 21120 is $148,090, above the national median of ~$75,000.

What is the typical home value in ZIP code 21120?

The median home value in ZIP code 21120 is $527,100.

What timezone is ZIP code 21120 in?

ZIP code 21120 observes the EST timezone.