PlainZIP

Darlington, MD · standard

ZIP Code 21034

Harford County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

3,387
52/sq mi
$78,047
Median income
$401,500
Median home value
22.8%
Bachelor's or higher

The verdict

Darlington pairs an above-median household income with upper-quartile home values, in a rural, homeowner-dominated area.

Top 41%
household income, US ZIPs
Top 20%
home value, US ZIPs
52
people per sq mi
90%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21034 against every reporting US ZIP.

ZIP code 21034 covers 65.1 square miles in Darlington, Harford County, Maryland (a standard USPS delivery area), with a modest 3,387 residents on file, a density of 52 people per square mile, in the New York time zone.

ZIP 21034 lands in the middle-income range, with a median household income of $78,047 (32% below the Maryland average), while per-capita income is $43,178. 9.7% of residents live below the poverty line, and the unemployment rate reads 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.

Educational attainment sits below the national norm: 22.8% of adults hold a bachelor's degree or higher, the median age is 45.1, and the average commute is 31 minutes. To put 21034 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Harford County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 21034

Top 5 sectors by establishment count in Darlington, MD

Which industries have the most business establishments in ZIP 21034.

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 · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, 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; 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

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 21034?

45.1

Median Age

56.5%

Male

43.5%

Female

2.2%

Foreign-Born

White 88.1%
African American 1.1%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 2.7%
Hispanic or Latino 8.4%

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

How ZIP 21034 ranks nationally

Darlington, MD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$78,047 Top 41% higher than 59% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 62.6%
Bachelor's Degree or Higher 22.8%

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

Owner 89.8%
Renter 10.2%

$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 21034 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 21034 ranks #9 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 21034 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 21034 ranks #null of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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

21014 standard
Bel Air, MD
Pop: 36,047
21009 standard
Abingdon, MD
Pop: 29,766
21015 standard
Bel Air, MD
Pop: 27,763
21040 standard
Edgewood, MD
Pop: 24,420
21001 standard
Aberdeen, MD
Pop: 21,487
21050 standard
Forest Hill, MD
Pop: 18,202

Related Areas

Harford County Darlington, MD Maryland

Frequently Asked Questions

What county is ZIP code 21034 in? ▼
ZIP code 21034 (Darlington) is located in Harford County, Maryland. Harford County contains multiple ZIP codes, see the full list at /counties/harford-md.
What is the population of ZIP code 21034? ▼
ZIP code 21034 in Darlington, MD has a population of 3,387 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21034? ▼
The median household income in ZIP 21034 is $78,047, which is 2% above the national average of $76,288.
What is the average home value in ZIP 21034? ▼
The median home value in ZIP 21034 is $401,500, which is 44% above the national average of $278,155.
What is the demographic makeup of ZIP 21034? ▼
The largest racial group in ZIP 21034 is White at 88.1%. Hispanic or Latino residents make up 8.4% of the population.
How many businesses are in ZIP code 21034? ▼
ZIP code 21034 has 80 business establishments employing approximately 611 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 21034? ▼
The top industries by establishment count in ZIP 21034 are: Construction (21), Administrative and support and waste management and remediation services (12), Retail trade (10). There are 9 industry sectors represented in total.
How have home values changed in ZIP code 21034? ▼
According to the FHFA House Price Index, home values in ZIP 21034 increased by 13.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 137%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 21034? ▼
In ZIP code 21034, 62.6% of residents aged 25+ have a high school diploma or higher, and 22.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 21034? ▼
The mean commute time for workers in ZIP code 21034 is 30.9 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 21034? ▼
In ZIP code 21034, approximately 89.8% of occupied housing units are owner-occupied and 10.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21034? ▼
The poverty rate in ZIP code 21034 is 9.7% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.