21077 ZIP Code, Harmans, MD
21077 is a ZIP code in Harmans, Maryland in Anne Arundel County. It covers 0.4 square miles of land. The closest ZIP codes are 21076, 21240 and 21144. 63 people live here in 35 households, fewer than in most Maryland ZIP codes. With about 144 people per square mile it is lightly settled, and most homes are owner-occupied (77%).
Quick facts
- Mailing city: Harmans, MD
- County: Anne Arundel County
- Land area: 0.4 sq mi
- Population: 63
- Carrier routes: 1 (142 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 63 |
| Households | 35 |
| Median household income | not published |
| Income per person | $48,338 |
| Median age | 29.9 |
| Homeowners | 77.1% |
| Median home value | not published |
| Median rent | not published |
| Bachelor's degree or higher | 44.4% |
| Average commute (minutes) | not published |
| Households with kids under 18 | 0.0% |
| Moved in the past year | 52.4% |
| Below the poverty line | 0.0% |
| Broadband internet | 100.0% |
| Speak a non-English language at home | 0.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 0.0% |
| $10–15K | 0.0% |
| $15–25K | 22.9% |
| $25–35K | 0.0% |
| $35–50K | 0.0% |
| $50–75K | 45.7% |
| $75–100K | 0.0% |
| $100–150K | 0.0% |
| $150–200K | 31.4% |
| $200K+ | 0.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 0.0% |
| 10–19 | 0.0% |
| 20–24 | 0.0% |
| 25–34 | 52.4% |
| 35–44 | 0.0% |
| 45–54 | 47.6% |
| 55–64 | 0.0% |
| 65–74 | 0.0% |
| 75+ | 0.0% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 77.1% |
| Owned outright | 0.0% |
| Rented | 22.9% |
| Vacant | 0.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 77.1% |
| Townhome | 0.0% |
| 2–4 units | 22.9% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 0.0% |
Businesses in 21077
23 business establishments with 1,107 employees (ZIP Codes Business Patterns 2023).
- Construction: 5
- Information: 3
- Other Services (except Public Administration): 3
EDDM carrier routes
21077 has 1 USPS carrier routes with 142 residential and 30 business mailboxes. Open the EDDM route map.
Carrier routes in 21077
21077 has 1 USPS carrier routes (1 rural (R)) with 142 residential and 30 business mailboxes. Routes range from 142 homes (R007) to 142 homes (R007); the median route has 142 homes. The Census counted 35 households in 21077 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 0 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Every carrier route in 21077
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R007 | Rural | 142 | 30 | $105,441 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21077 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
- 21076 — Severn CDP, MD (1.6 mi)
- 21240 (1.9 mi)
- 21144 — Severn CDP, MD (2.9 mi)
- 21061 — Glen Burnie CDP, MD (3.6 mi)
- 21090 — Linthicum CDP, MD (4 mi)
- 21075 — Elkridge CDP, MD (4.1 mi)
- 20755 — Fort Meade CDP, MD (4.8 mi)
- 20701 — Jessup CDP, MD (5.1 mi)
Areas that include 21077
- Severn, MD ZIP codes — 3 ZIP codes
- Harmans, MD ZIP codes — 1 ZIP code
- Anne Arundel County ZIP codes — 41 ZIP codes
- Maryland ZIP code data
Mail every home in 21077
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) 21077, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 21077 in?
- 21077 is a Harmans, MD mailing address. By land area, 62% lies inside Severn; the rest is outside any Census-defined city or community.
- What county is 21077 in?
- 21077 is in Anne Arundel County.
- What is the population of 21077?
- About 63 people (±68), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 336.
- How many carrier routes and mailboxes are in 21077?
- 1 USPS carrier routes with 142 residential and 30 business mailboxes (172 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 21077?
- The closest, measured center to center: 21076 (1.6 mi, Severn), 21240 (1.9 mi), 21144 (2.9 mi, Severn), 21061 (3.6 mi, Glen Burnie), 21090 (4 mi, Linthicum) and 21075 (4.1 mi, Elkridge).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.