ZIP Code 21084
standardSource:
Jarrettsville · Harford County · Maryland
- Population
- 7,652
- Median income
- $121,509
- Median home value
- $448,400
- Bachelor's or higher
- 42.9%
- Land area
- 63.5 sq mi
121/sq mi
▲ 59% vs US
higher than 91% of US ZIPs
▲ 61% vs US
higher than 84% of US ZIPs
Median age 44
New York
ZIP code 21084 in Jarrettsville, Maryland has a population of 7,652. The median household income is $121,509, which is 59% above the national average. Median home value is $448,400, 61% above the US average. 42.9% of residents hold a bachelor's degree or higher.
ZIP code 21084 is classified by USPS as a standard delivery area and covers roughly 63.5 square miles in Jarrettsville, Harford County, Maryland. The area is home to 7,652 residents, producing a population density of 121 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 21084 against Maryland and the nation.
On the economic side, the median household income for ZIP 21084 sits at $121,509 (6% above the Maryland average), while per-capita income is $58,001. The poverty rate stands at 5.7% and the unemployment rate at 5.5%. On housing, the median home value is $448,400 (0% above the state average) with median rent at — per month, and 93.6% of occupied units are owner-occupied, a direct signal of whether 21084 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 42.9% of adults hold a bachelor's degree or higher, the median age is 44, and the average commute is 39 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Harford County, so you can benchmark 21084 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 21084
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 21084.
- Construction
Construction
58 establishments
- Professional, scientific, and technical services 21
Professional, scientific, and technical services
21 establishments
- Retail trade 19
Retail trade
19 establishments
- Administrative and support and waste management and remediation services 19
Administrative and support and waste management and remediation services
19 establishments
- Other services (except public administration) 19
Other services (except public administration)
19 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 21084, Jarrettsville, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
7,652
Population
63.5
Area (sq mi)
121
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21084?
44.0
Median Age
51.8%
Male
48.2%
Female
3.1%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$121,509
Median Household Income
+6% vs state
$58,001
Per Capita Income
5.7%
Poverty Rate
5.5%
Unemployment Rate
39.2 min
Mean Commute Time
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
2,765
Total Housing Units
2,724
Occupied Units
41
Vacant Units
2.59
Avg Household Size
Occupancy Type
$448,400
Median Home Value
+0% vs state
1978
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+4.6%
YoY Change (2024)
240
HPI Index (2000 = 100)
+140%
Total Change Since 2000
Home values in ZIP 21084 have increased 4.6% over the past year (2024). Since 2000, this ZIP has seen +140% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +3.7% | 176 |
| 2021 | +8.2% | 190 |
| 2022 | +13.3% | 215 |
| 2023 | +6.5% | 229 |
| 2024 | +4.6% | 240 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 191 business establishments in ZIP 21084, employing approximately 1,044 people with a combined annual payroll of $52,539,000.
191
Businesses
1,044
Employees
$52.5M
Annual Payroll
13
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 58 | 30.4% |
| Professional, scientific, and technical services | 21 | 11.0% |
| Retail trade | 19 | 9.9% |
| Administrative and support and waste management and remediation services | 19 | 9.9% |
| Other services (except public administration) | 19 | 9.9% |
| Health care and social assistance | 14 | 7.3% |
| Real estate and rental and leasing | 10 | 5.2% |
| Finance and insurance | 6 | 3.1% |
| Accommodation and food services | 6 | 3.1% |
| Transportation and warehousing | 5 | 2.6% |
| Wholesale trade | 4 | 2.1% |
| Information | 3 | 1.6% |
| Educational services | 3 | 1.6% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 21084 vs 21050 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 21050 | Forest Hill, MD | 18,202 | 4.4 mi |
| 21047 | Fallston, MD | 11,873 | 6.2 mi |
| 21132 | Pylesville, MD | 2,634 | 5.8 mi |
| 21013 | Baldwin, MD | 4,653 | 7.5 mi |
| 21154 | Street, MD | 6,464 | 6.3 mi |
| 21161 | White Hall, MD | 5,490 | 6.2 mi |
| 21082 | Hydes, MD | 654 | 9.5 mi |
| 21051 | Fork, MD | 279 | 10.0 mi |
| 17321 | Fawn Grove, PA | 2,238 | 9.6 mi |
| 21111 | Monkton, MD | 4,903 | 6.8 mi |
More ZIP Codes in Harford County
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Frequently Asked Questions
What county is ZIP code 21084 in? ▼
What is the population of ZIP code 21084? ▼
What is the median household income in ZIP 21084? ▼
What is the average home value in ZIP 21084? ▼
What is the demographic makeup of ZIP 21084? ▼
How many businesses are in ZIP code 21084? ▼
What are the main industries in ZIP code 21084? ▼
How have home values changed in ZIP code 21084? ▼
What is the education level in ZIP code 21084? ▼
What is the average commute time in ZIP 21084? ▼
What percentage of residents own vs. rent in ZIP 21084? ▼
What is the poverty rate in ZIP code 21084? ▼
ZIP Code Research Guides
Official Data Resources for Jarrettsville, MD
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.