21207 ZIP Code, Gwynn Oak, MD
21207 is a ZIP code in Gwynn Oak, Maryland — mostly in Baltimore County (72% of its land), with smaller parts in Baltimore city County. It covers 10 square miles of land. The closest ZIP codes are 21215, 21216 and 21229. 47,099 people live here in 18,976 households, more than in 9 of every 10 Maryland ZIP codes. At about 4,553 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (61% own). Median household income is $67,060, well below the Maryland median of $103,678.
Quick facts
- Mailing city: Gwynn Oak, MD
- County: Baltimore County
- Land area: 10 sq mi
- Population: 47,099
- Median household income: $67,060
- Carrier routes: 34 (19,296 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 47,099 |
| Households | 18,976 |
| Median household income | $67,060 |
| Income per person | $35,387 |
| Median age | 39.5 |
| Homeowners | 60.7% |
| Median home value | $260,300 |
| Median rent | $1,432 |
| Bachelor's degree or higher | 29.3% |
| Average commute (minutes) | 29.7 |
| Households with kids under 18 | 29.2% |
| Moved in the past year | 11.5% |
| Below the poverty line | 13.5% |
| Broadband internet | 82.5% |
| Speak a non-English language at home | 14.3% |
Household income
| % of households | Value |
|---|---|
| <$10K | 8.1% |
| $10–15K | 3.2% |
| $15–25K | 5.8% |
| $25–35K | 7.6% |
| $35–50K | 13.0% |
| $50–75K | 17.3% |
| $75–100K | 13.7% |
| $100–150K | 16.0% |
| $150–200K | 8.0% |
| $200K+ | 7.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.7% |
| 10–19 | 12.1% |
| 20–24 | 5.2% |
| 25–34 | 13.4% |
| 35–44 | 13.3% |
| 45–54 | 11.6% |
| 55–64 | 13.0% |
| 65–74 | 10.4% |
| 75+ | 8.3% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 40.7% |
| Owned outright | 17.2% |
| Rented | 36.1% |
| Vacant | 5.9% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 50.7% |
| Townhome | 21.0% |
| 2–4 units | 4.3% |
| 5–19 units | 17.4% |
| 20+ units | 6.1% |
| Mobile / other | 0.5% |
Businesses in 21207
498 business establishments with 6,909 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 76
- Retail Trade: 70
- Other Services (except Public Administration): 66
- Accommodation and Food Services: 60
- Professional, Scientific, and Technical Services: 46
- Administrative and Support and Waste Management and Remediation Services: 38
- Construction: 37
- Real Estate and Rental and Leasing: 29
EDDM carrier routes
21207 has 34 USPS carrier routes with 19,296 residential and 623 business mailboxes. Open the EDDM route map.
Carrier routes in 21207
21207 has 34 USPS carrier routes (34 city (C)) with 19,296 residential and 623 business mailboxes. Routes range from 56 homes (C038) to 1,069 homes (C004); the median route has 518 homes. The Census counted 18,976 households in 21207 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 13 |
| 500–749 | 16 |
| 750–999 | 3 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Best routes in 21207 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C038 — USPS business mailboxes 198, 56 homes
- Route C053 — USPS business mailboxes 57, 409 homes
- Route C049 — USPS business mailboxes 49, 829 homes
- Route C094 — USPS business mailboxes 46, 517 homes
- Route C089 — USPS business mailboxes 29, 724 homes
Select these 5 routes on the route map
Every carrier route in 21207
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 685 | 1 | $65,532 | — | — | — |
| C002 | City | 602 | 29 | $48,351 | — | — | — |
| C003 | City | 380 | 15 | $90,252 | — | — | — |
| C004 | City | 1,069 | 13 | $73,169 | — | — | — |
| C005 | City | 700 | 3 | $64,263 | — | — | — |
| C006 | City | 444 | 6 | $78,911 | — | — | — |
| C008 | City | 454 | 2 | $80,437 | — | — | — |
| C009 | City | 655 | 6 | $50,118 | — | — | — |
| C014 | City | 464 | 19 | $33,118 | — | — | — |
| C017 | City | 619 | 2 | $54,655 | — | — | — |
| C024 | City | 453 | 2 | $82,711 | — | — | — |
| C025 | City | 479 | 2 | $88,975 | — | — | — |
| C032 | City | 471 | 4 | $83,142 | — | — | — |
| C033 | City | 415 | 17 | $53,737 | — | — | — |
| C034 | City | 566 | 27 | $77,312 | — | — | — |
| C035 | City | 628 | 15 | $77,994 | — | — | — |
| C036 | City | 424 | 14 | $109,231 | — | — | — |
| C038 | City | 56 | 198 | $63,901 | — | — | — |
| C044 | City | 445 | 11 | $77,418 | — | — | — |
| C045 | City | 518 | 2 | $58,673 | — | — | — |
| C047 | City | 650 | 8 | $73,169 | — | — | — |
| C049 | City | 829 | 49 | $58,673 | — | — | — |
| C053 | City | 409 | 57 | $163,369 | — | — | — |
| C055 | City | 642 | 2 | $50,056 | — | — | — |
| C056 | City | 477 | 4 | $82,711 | — | — | — |
| C075 | City | 505 | 18 | $32,552 | — | — | — |
| C086 | City | 799 | 6 | $90,252 | — | — | — |
| C089 | City | 724 | 29 | $63,901 | — | — | — |
| C090 | City | 731 | 1 | $58,673 | — | — | — |
| C094 | City | 517 | 46 | $51,353 | — | — | — |
| C096 | City | 782 | 5 | $69,218 | — | — | — |
| C097 | City | 507 | 2 | $83,672 | — | — | — |
| C098 | City | 708 | 2 | $58,673 | — | — | — |
| C099 | City | 489 | 6 | $75,187 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21207 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
- 21215 — Baltimore city, MD (2.5 mi)
- 21216 — Baltimore city, MD (2.7 mi)
- 21229 — Baltimore city, MD (3.1 mi)
- 21244 — Milford Mill CDP, MD (3.1 mi)
- 21228 — Catonsville CDP, MD (3.9 mi)
- 21208 — Pikesville CDP, MD (4.1 mi)
- 21211 — Baltimore city, MD (4.3 mi)
- 21217 — Baltimore city, MD (4.5 mi)
Areas that include 21207
- Baltimore, MD ZIP codes — 28 ZIP codes
- Woodlawn, MD ZIP codes — 3 ZIP codes
- Lochearn, MD ZIP codes — 2 ZIP codes
- Gwynn Oak, MD ZIP codes — 1 ZIP code
- Baltimore city County ZIP codes — 26 ZIP codes
- Baltimore County ZIP codes — 54 ZIP codes
- Maryland ZIP code data
Where it ranks
Mail every home in 21207
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.
Baltimore EDDM mailing
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 21207, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 21207 in?
- 21207 is a Gwynn Oak, MD mailing address. By land area, 39% lies inside Lochearn, 33% lies inside Woodlawn and 28% lies inside Baltimore.
- What county is 21207 in?
- 21207 is mostly in Baltimore County (72% of its land), with smaller parts in Baltimore city County.
- What is the population of 21207?
- About 47,099 people (±2,836), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 46,595.
- What is the median household income in 21207?
- $67,060 (±$4,884), 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 21207?
- 34 USPS carrier routes with 19,296 residential and 623 business mailboxes (19,919 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 21207?
- The closest, measured center to center: 21215 (2.5 mi, Baltimore), 21216 (2.7 mi, Baltimore), 21229 (3.1 mi, Baltimore), 21244 (3.1 mi, Milford Mill), 21228 (3.9 mi, Catonsville) and 21208 (4.1 mi, Pikesville).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.