ZIP Code 21034
standardSource:
Darlington · Harford County · Maryland
- Population
- 3,387
- Median income
- $78,047
- Median home value
- $401,500
- Bachelor's or higher
- 22.8%
- Land area
- 65.1 sq mi
52/sq mi
▲ 2% vs US
higher than 59% of US ZIPs
▲ 44% vs US
higher than 80% of US ZIPs
Median age 45.1
New York
ZIP code 21034 in Darlington, Maryland has a population of 3,387. The median household income is $78,047, which is 2% above the national average. Median home value is $401,500, 44% above the US average. 22.8% of residents hold a bachelor's degree or higher.
ZIP code 21034 is classified by USPS as a standard delivery area and covers roughly 65.1 square miles in Darlington, Harford County, Maryland. The area is home to 3,387 residents, producing a population density of 52 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 21034 against Maryland and the nation.
On the economic side, the median household income for ZIP 21034 sits at $78,047 (32% below the Maryland average), while per-capita income is $43,178. The poverty rate stands at 9.7% and the unemployment rate at 0.4%. On housing, the median home value is $401,500 (10% below the state average) with median rent at $1,151 per month, and 89.8% of occupied units are owner-occupied, a direct signal of whether 21034 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 22.8% of adults hold a bachelor's degree or higher, the median age is 45.1, and the average commute is 31 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Harford County, so you can benchmark 21034 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 21034
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 21034.
- Construction
Construction
21 establishments
- Administrative and support and waste management and remediation services
Administrative and support and waste management and remediation services
12 establishments
- Retail trade
Retail trade
10 establishments
- Other services (except public administration)
Other services (except public administration)
10 establishments
- Professional, scientific, and technical services 5
Professional, scientific, and technical services
5 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 21034, Darlington, 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
3,387
Population
65.1
Area (sq mi)
52
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21034?
45.1
Median Age
56.5%
Male
43.5%
Female
2.2%
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?
$78,047
Median Household Income
-32% vs state
$43,178
Per Capita Income
9.7%
Poverty Rate
0.4%
Unemployment Rate
30.9 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?
1,151
Total Housing Units
1,132
Occupied Units
19
Vacant Units
2.51
Avg Household Size
Occupancy Type
$401,500
Median Home Value
-10% vs state
$1,151
Median Rent
1977
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
+13.0%
YoY Change (2024)
237
HPI Index (2000 = 100)
+137%
Total Change Since 2000
Home values in ZIP 21034 have increased 13.0% over the past year (2024). Since 2000, this ZIP has seen +137% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +3.6% | 165 |
| 2021 | +5.3% | 174 |
| 2022 | +11.3% | 194 |
| 2023 | +8.1% | 209 |
| 2024 | +13.0% | 237 |
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 80 business establishments in ZIP 21034, employing approximately 611 people with a combined annual payroll of $37,755,000.
80
Businesses
611
Employees
$37.8M
Annual Payroll
9
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 21 | 26.3% |
| Administrative and support and waste management and remediation services | 12 | 15.0% |
| Retail trade | 10 | 12.5% |
| Other services (except public administration) | 10 | 12.5% |
| Professional, scientific, and technical services | 5 | 6.3% |
| Wholesale trade | 4 | 5.0% |
| Transportation and warehousing | 4 | 5.0% |
| Arts, entertainment, and recreation | 3 | 3.8% |
| Accommodation and food services | 3 | 3.8% |
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 21034 vs 21918 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 21918 | Conowingo, MD | 4,284 | 3.7 mi |
| 21028 | Churchville, MD | 3,460 | 5.8 mi |
| 21154 | Street, MD | 6,464 | 7.2 mi |
| 21917 | Colora, MD | 2,520 | 6.7 mi |
| 21160 | Whiteford, MD | 2,408 | 6.1 mi |
| 17563 | Peach Bottom, PA | 3,849 | 8.1 mi |
| 21078 | Havre De Grace, MD | 17,603 | 6.8 mi |
| 21001 | Aberdeen, MD | 21,487 | 9.7 mi |
| 21904 | Port Deposit, MD | 7,252 | 7.8 mi |
| 21015 | Bel Air, MD | 27,763 | 8.2 mi |
More ZIP Codes in Harford County
Related Areas
Frequently Asked Questions
What county is ZIP code 21034 in? ▼
What is the population of ZIP code 21034? ▼
What is the median household income in ZIP 21034? ▼
What is the average home value in ZIP 21034? ▼
What is the demographic makeup of ZIP 21034? ▼
How many businesses are in ZIP code 21034? ▼
What are the main industries in ZIP code 21034? ▼
How have home values changed in ZIP code 21034? ▼
What is the education level in ZIP code 21034? ▼
What is the average commute time in ZIP 21034? ▼
What percentage of residents own vs. rent in ZIP 21034? ▼
What is the poverty rate in ZIP code 21034? ▼
ZIP Code Research Guides
Official Data Resources for Darlington, 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.