21078 ZIP Code, Havre De Grace, MD
21078 is a ZIP code in Havre De Grace, Maryland in Harford County. It covers 30 square miles of land. The closest ZIP codes are 21902, 21001 and 21903. 20,030 people live here in 8,476 households. With about 665 people per square mile it is lightly settled, and most homes are owner-occupied (77%). Median household income is $106,667, close to the Maryland median of $103,678; the median age is 46.8, older than most ZIP codes.
Quick facts
- Mailing city: Havre De Grace, MD
- County: Harford County
- Land area: 30 sq mi
- Population: 20,030
- Median household income: $106,667
- Carrier routes: 16 (9,237 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 20,030 |
| Households | 8,476 |
| Median household income | $106,667 |
| Income per person | $53,163 |
| Median age | 46.8 |
| Homeowners | 77.0% |
| Median home value | $385,600 |
| Median rent | $1,433 |
| Bachelor's degree or higher | 41.6% |
| Average commute (minutes) | 28.4 |
| Households with kids under 18 | 25.2% |
| Moved in the past year | 7.9% |
| Below the poverty line | 8.5% |
| Broadband internet | 92.7% |
| Speak a non-English language at home | 6.6% |
Household income
| % of households | Value |
|---|---|
| <$10K | 3.7% |
| $10–15K | 3.4% |
| $15–25K | 3.8% |
| $25–35K | 5.7% |
| $35–50K | 8.1% |
| $50–75K | 12.1% |
| $75–100K | 10.3% |
| $100–150K | 19.0% |
| $150–200K | 16.9% |
| $200K+ | 16.9% |
Age
| % of all residents | Value |
|---|---|
| <10 | 7.5% |
| 10–19 | 13.6% |
| 20–24 | 4.2% |
| 25–34 | 12.0% |
| 35–44 | 10.8% |
| 45–54 | 12.9% |
| 55–64 | 16.3% |
| 65–74 | 13.9% |
| 75+ | 8.9% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 48.8% |
| Owned outright | 25.1% |
| Rented | 21.7% |
| Vacant | 4.4% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 60.1% |
| Townhome | 15.6% |
| 2–4 units | 7.7% |
| 5–19 units | 8.6% |
| 20+ units | 3.4% |
| Mobile / other | 4.6% |
Businesses in 21078
397 business establishments with 5,525 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 64
- Professional, Scientific, and Technical Services: 45
- Other Services (except Public Administration): 45
- Retail Trade: 40
- Accommodation and Food Services: 39
- Construction: 37
- Administrative and Support and Waste Management and Remediation Services: 21
- Real Estate and Rental and Leasing: 18
EDDM carrier routes
21078 has 16 USPS carrier routes with 9,237 residential and 463 business mailboxes. Open the EDDM route map.
Carrier routes in 21078
21078 has 16 USPS carrier routes (7 city (C), 9 rural (R)) with 9,237 residential and 463 business mailboxes. Routes range from 355 homes (C001) to 854 homes (R003); the median route has 542 homes. The Census counted 8,476 households in 21078 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 7 |
| 500–749 | 6 |
| 750–999 | 3 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 21078 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C003 — USPS business mailboxes 81, 453 homes
- Route R001 — USPS business mailboxes 80, 732 homes
- Route C006 — USPS business mailboxes 76, 531 homes
- Route R003 — USPS business mailboxes 63, 854 homes
- Route C002 — USPS business mailboxes 53, 456 homes
Select these 5 routes on the route map
Every carrier route in 21078
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 355 | 27 | $100,000 | — | — | — |
| C002 | City | 456 | 53 | $100,000 | — | — | — |
| C003 | City | 453 | 81 | $58,828 | — | — | — |
| C004 | City | 428 | 1 | $49,306 | — | — | — |
| C005 | City | 478 | 21 | $50,460 | — | — | — |
| C006 | City | 531 | 76 | $50,460 | — | — | — |
| C007 | City | 375 | 31 | $49,306 | — | — | — |
| R001 | Rural | 732 | 80 | $34,113 | — | — | — |
| R002 | Rural | 570 | 9 | $117,777 | — | — | — |
| R003 | Rural | 854 | 63 | $34,113 | — | — | — |
| R004 | Rural | 553 | 13 | $135,843 | — | — | — |
| R005 | Rural | 670 | 0 | $145,559 | — | — | — |
| R006 | Rural | 827 | 2 | $100,559 | — | — | — |
| R007 | Rural | 725 | 0 | $165,923 | — | — | — |
| R008 | Rural | 853 | 3 | $136,486 | — | — | — |
| R009 | Rural | 377 | 3 | $112,515 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21078 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 21902 (4.2 mi)
- 21001 — Aberdeen city, MD (4.9 mi)
- 21903 — Perryville town, MD (5.2 mi)
- 21904 — Port Deposit town, MD (5.5 mi)
- 21028 (5.8 mi)
- 21005 — Aberdeen Proving Ground CDP, MD (6.2 mi)
- 21130 — Perryman CDP, MD (6.4 mi)
- 21034 — Darlington CDP, MD (7.1 mi)
Areas that include 21078
- Havre de Grace, MD ZIP codes — 1 ZIP code
- Harford County ZIP codes — 22 ZIP codes
- Maryland ZIP code data
Where it ranks
Mail every home in 21078
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 21078, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 21078 in?
- 21078 is a Havre De Grace, MD mailing address. By land area, 19% lies inside Havre de Grace; the rest is outside any Census-defined city or community.
- What county is 21078 in?
- 21078 is in Harford County.
- What is the population of 21078?
- About 20,030 people (±745), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 20,321.
- What is the median household income in 21078?
- $106,667 (±$10,243), compared with $103,678 for Maryland as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 21078?
- 16 USPS carrier routes with 9,237 residential and 463 business mailboxes (9,700 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 21078?
- The closest, measured center to center: 21902 (4.2 mi), 21001 (4.9 mi, Aberdeen), 21903 (5.2 mi, Perryville), 21904 (5.5 mi, Port Deposit), 21028 (5.8 mi) and 21005 (6.2 mi, Aberdeen Proving Ground).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.