21084 ZIP Code — Jarrettsville, MD

Harford County, Maryland

ZIP code 21084 is located in Jarrettsville, Maryland, within Harford County. It covers approximately 23.76 square miles and serves a population of 7,366 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410.

About ZIP code 21084

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $431,800. Owner-occupancy is high at 89%, well above the national average.

Median household income is $114,200. 43% 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. An above-average commute of 39 minutes suggests many residents work outside the immediate area.

Educational attainment is near the national average, with 35% of residents holding a bachelor's degree or higher.

Overall, ZIP code 21084 reflects a community defined by high homeownership and a significant Social Security-dependent population.

7,366

population

23.76

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21084 ZIP code map

Cities in ZIP code 21084

Below are the cities the US Postal Service accepts for ZIP code 21084. Using any city not on this list may result in mail delivery delays.

City	Status
Jarrettsville	Preferred

Nearby ZIP codes

21050 Forest Hill (3.9 mi) 21154 Street (4.8 mi) 21047 Fallston (5.6 mi) 21132 Pylesville (5.9 mi) 21013 Baldwin (6.9 mi) 21161 White Hall (7.1 mi) 21014 Bel Air (7.6 mi) 21111 Monkton (7.7 mi) 21051 Fork (9.4 mi) 21082 Hydes (9.5 mi) 21160 Whiteford (9.5 mi) 21015 Bel Air (9.8 mi)

Demographics updated 05/2026

Population
Total population	7,366
Population density	310 / sq mi
State FIPS	24
County FIPS	025

Geography
Land area	23.76 sq mi
Water area	0.08 sq mi
Latitude	39.6137
Longitude	-76.4573
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	26.5%	25.4%	28.2%
$50k – $100k	25.6%	28.0%	28.2%
$100k – $200k	35.6%	34.2%	30.1%
Over $200k	12.3%	12.4%	13.4%

Demographics & statistics

7,366

Population

310

People per sq mi

50.6

Median age

$114,200

Median household income

$52,396

Per capita income

$431,800

Median home value

$1,102

Median monthly rent

89.2%

Home ownership

7.6%

Poverty rate

6.1%

Unemployment

2,577

Housing units

35.2%

Bachelor's or higher

Age distribution

Male Female

139

Under 5

123

224

5–9

198

234

10–14

206

194

15–19

172

239

20–24

211

340

25–34

300

401

35–44

354

485

45–54

427

406

55–59

358

294

60–64

260

521

65–74

459

384

75–84

339

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,452	19.7%
18 and over	5,914	80.3%
65 and over	1,801	24.5%
Median age	50.6 years

Race & ethnicity

White 89.3%

Two or more races 3.7%

Asian 3.2%

Hispanic or Latino 2.5%

Black or African American 0.9%

Other race 0.4%

Group	Count	%
White	6,745	89.3%
Two or more races	281	3.7%
Asian	240	3.2%
Hispanic or Latino	190	2.5%
Black or African American	68	0.9%
Other race	32	0.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.5%	25.4%	28.2%
$50k – $100k	25.6%	28.0%	28.2%
$100k – $200k	35.6%	34.2%	30.1%
Over $200k	12.3%	12.4%	13.4%

Under $10k 3.0%

$10k–$15k 2.7%

$15k–$25k 3.3%

$25k–$35k 1.9%

$35k–$50k 10.3%

$50k–$75k 13.0%

$75k–$100k 6.4%

$100k–$150k 21.8%

$150k–$200k 16.0%

$200k+ 21.7%

Range	% of households
Under $10k	3.0%
$10k–$15k	2.7%
$15k–$25k	3.3%
$25k–$35k	1.9%
$35k–$50k	10.3%
$50k–$75k	13.0%
$75k–$100k	6.4%
$100k–$150k	21.8%
$150k–$200k	16.0%
$200k+	21.7%
Median income	$114,200

Housing

Home values

Under $50k 1.1%

$100k–$150k 0.4%

$200k–$300k 6.1%

$300k–$500k 62.2%

$500k–$1M 29.4%

$1M+ 0.8%

Housing overview

Metric	Value
Median home value	$431,800
Median rent / month	$1,102
Owner occupied	89.2%
Renter occupied	10.8%
Vacant	4.4%
Single-family detached	93.8%
Large apartment buildings	0.0%
Mobile homes	4.1%
Median rooms	7.9
Avg household size (owned)	2.76

Year built

Era	%
2020 or later	0.0%
2010–2019	2.9%
2000–2009	11.4%
1990–1999	9.9%
1980–1989	21.5%
1970–1979	27.8%
1960–1969	13.2%
1950–1959	6.0%
1940–1949	1.3%
1939 or earlier	5.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	3.1%
2 bedrooms	5.9%
3 bedrooms	47.7%
4 bedrooms	31.1%
5+ bedrooms	12.2%

Vehicles per household

Vehicles	% of households
No vehicle	1.3%
1 vehicle	10.3%
2 vehicles	42.3%
3 or more	46.1%

Heating fuel

Fuel type	%
Utility gas	4.7%
Electricity	46.8%
Propane / LP gas	8.7%
Fuel oil	33.3%
Wood	3.7%
Solar	0.8%

Households & families

Household type	Count	%
Married-couple family	1,882	68.5%
Cohabiting couple	136	4.9%
Male householder, no spouse	352	12.8%
Female householder, no spouse	378	13.8%
Households with children under 18	687	25.0%
Households with seniors (65+)	1,208	44.0%
Average household size	2.68

Marital status

Status	Male	Female
Never married	25.3%	14.2%
Married	61.1%	68.2%
Separated	1.2%	0.2%
Widowed	6.2%	9.9%
Divorced	6.3%	7.5%

Education

Less than 9th grade 1.1%

Some HS, no diploma 4.3%

HS graduate 27.4%

Some college, no degree 22.4%

Associate's degree 9.6%

Bachelor's degree 21.7%

Graduate / professional 13.6%

Metric	%
HS diploma or higher	94.7%
Bachelor's or higher	35.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	66	4.4%
Kindergarten	45	3.0%
Elementary school	764	50.8%
High school	351	23.3%
College / grad school	279	18.5%

Employment

Industry of employment

Education & healthcare 26.7%

Construction 13.7%

Public administration 10.9%

Professional & management 10.7%

Retail trade 9.9%

Finance & real estate 7.4%

Other services 5.7%

Manufacturing 4.9%

Arts, food & hospitality 4.5%

Transportation & utilities 3.0%

Information 1.6%

Wholesale trade 1.1%

Occupation

Category	%
Management, business & arts	51.8%
Service	12.0%
Sales & office	18.0%
Natural resources & construction	12.6%
Production & transportation	5.6%

Employment type

Type	%
Private sector	73.4%
Government	20.7%
Self-employed	6.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	80.3%
Carpool	6.3%
Public transit	0.0%
Walk	0.8%
Work from home	12.5%
Other means	0.0%
Avg commute (minutes)	39.4

Poverty

All people 7.6%

Under 18 years 5.0%

18 and over 8.3%

Married-couple families 6.2%

Female-led households 21.7%

Income support

Source	% of households
Social Security	43.3%
Retirement income	40.0%
Supplemental Security	3.0%
Cash public assistance	1.6%
Food stamps / SNAP	6.5%

Health indicators

Condition	%
Obesity	31.5%
High blood pressure	35.4%
High cholesterol	35.7%
Diabetes	9.2%
Heart disease	6.1%
Stroke	2.6%
Asthma	9.4%
Arthritis	25.2%
Kidney disease	2.6%
Pulmonary disease	6.1%
Cancer	7.4%

Behavior / access	%
Smoking	14.0%
Binge drinking	15.2%
No physical activity	18.5%
Less than 7 hrs sleep	30.3%
Depression	18.7%
Fair or poor health	10.6%
Poor mental health	12.8%
Poor physical health	8.3%
No health insurance	7.6%
Visited doctor (checkup)	78.4%
Visited dentist	71.3%
Cholesterol screening	93.3%
Teeth loss	8.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	444	7.5%

Disability	%
Any disability	13.2%
Under 18	9.8%
18–64 years	6.2%
65 and over	31.8%

Health insurance coverage

Type	%
Private insurance	83.2%
Public insurance	36.3%
No insurance	1.5%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	7,104	96.4%
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)	7,154	97.1%
Born in same state	7,120	96.7%
Born in different state	5,691	77.3%
Foreign born	34	0.5%
Naturalized citizen	212	2.9%
Not a US citizen	163	76.9%

Ancestry

Ancestry	Count	%
Italian	1,052	14.3%
Arab	1,012	13.7%
French	961	13%
English	104	1.4%

Ancestry	Count	%
Polish	98	1.3%
Irish	47	0.6%
Norwegian	10	0.1%
Dutch	8	0.1%

Technology access

Metric	% of households
Computer access	37.3%
Internet access	98.1%

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

Frequently asked questions about ZIP code 21084

What city is ZIP code 21084 in?

ZIP code 21084 is primarily assigned to Jarrettsville, Maryland.

What county is ZIP code 21084 in?

ZIP code 21084 falls within Harford County, Maryland.

Is ZIP code 21084 mostly owner-occupied?

89% of occupied units in ZIP code 21084 are owner-occupied, well above the national average.

Does ZIP code 21084 have a large retiree population?

43% of households in ZIP code 21084 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 21084?

The median home value in ZIP code 21084 is $431,800.

What is the median household income in ZIP code 21084?

The median household income in ZIP code 21084 is $114,200, above the national median of ~$75,000.

What timezone is ZIP code 21084 in?

ZIP code 21084 observes the EST timezone.