Zip Code 21207
Gwynn Oak, Maryland — Baltimore County
📍 ZIP code 21207 is in Gwynn Oak, Baltimore County, Maryland.
ZIP code 21207 is located in Gwynn Oak, Baltimore County, Maryland. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 49,599. The area code for ZIP code 21207 is 410.
Quick Answer
Zip code 21207 is in Gwynn Oak, Maryland (Baltimore County). It has a population of 49,599, median household income of $64,284, and median home value of $248,400.
Population
49,599
Income
$64,284
Home Value
$248,400
Climate
87°F / 27°F
About Zip Code 21207
Zip code 21207 is located in Gwynn Oak, Maryland, within Baltimore County. Home to approximately 49,599 residents, this area sits at an elevation of 367 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 410.
The median household income is $64,284 per year, which is below the national median of $70,784. Homes in this zip code have a median value of $248,400, and the cost of living index is 83 (17% below the national average of 100).
Summers average a high of 87°F while winters drop to 27°F. The area receives about 45 in of rain and 9 in of snow annually. The zip code covers 10.3 square miles of land area.
Key Statistics
49,599
$64,284
$248,400
Eastern (EST/EDT)
410
367 ft
10.3 sq mi
38.5
20,974
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Compare With Nearby Zip Codes
| Metric | 21207 | 21215 | 21216 | 21229 | 21244 | 21228 |
|---|---|---|---|---|---|---|
| City | Gwynn Oak, MD | Baltimore, MD | Baltimore, MD | Baltimore, MD | Windsor Mill, MD | Catonsville, MD |
| Population | 49,599 | 52,078 | 27,296 | 44,687 | 39,545 | 49,417 |
| Median Income | $64,284 | $47,606 | $46,440 | $55,457 | $84,849 | $107,714 |
| Home Value | $248,400 | $189,900 | $148,800 | $184,900 | $271,200 | $389,200 |
| Cost of Living | 83 | 64 | 60 | 64 | 98 | 133 |
| Median Age | 38.5 | 40.3 | 36.7 | 38 | 35.3 | 43.1 |
Cost of Living
100 = National Average. Gwynn Oak's cost of living is 17% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
3.9x
Demographics
Zip code 21207 has a population of 49,599 people with a median age of 38.5. There are 20,974 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Gwynn Oak (21207) population trend from 2010 to 2024
↓ -30.9%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
87°F
27°F
45 in
9 in
Gwynn Oak experiences warm summers with average highs around 87°F. Winters are cool with lows averaging 27°F. The area receives about 9 in of snow per year.
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Housing & Economy
Median Home Value
$248,400
Median Household Income
$64,284
With 20,974 housing units across 10.3 square miles, 21207 has a housing density of 2,036 units per square mile. The home price-to-income ratio is 3.9x.
Location & Geography
Latitude
39.3242°
Longitude
-76.7195°
Land Area
10.3 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 21207 (Gwynn Oak, MD) with distances:
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 21207's $64,284. A way to compare Gwynn Oak to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 21207 (Gwynn Oak, MD). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Gwynn Oak, Maryland?
Gwynn Oak, Maryland uses zip code 21207.
What county is zip code 21207 in?
Zip code 21207 is located in Baltimore County, Maryland.
What is the population of zip code 21207?
The population of zip code 21207 is 49,599 with a median age of 38.5.
Is 21207 in Gwynn Oak, Maryland?
Yes, zip code 21207 is in Gwynn Oak, Baltimore County, Maryland. The area code is 410.
Frequently Asked Questions
What city is zip code 21207 in?
Zip code 21207 is in Gwynn Oak, Maryland. It is part of Baltimore County and uses the Eastern (EST/EDT) timezone.
What is zip code 21207?
Zip code 21207 is a U.S. postal code in Gwynn Oak, Maryland (Baltimore County). It has a population of 49,599 and covers 10.3 square miles.
What is the population of zip code 21207?
The population of zip code 21207 (Gwynn Oak, MD) is 49,599 with a median age of 38.5. There are approximately 20,974 housing units in this area.
What is the median income in zip code 21207?
The median household income in zip code 21207 (Gwynn Oak, MD) is $64,284 per year. The cost of living index is 83 (100 = national average).
What is the average home price in zip code 21207?
The median home value in zip code 21207 (Gwynn Oak, MD) is $248,400. The cost of living index is 83 compared to the national average of 100.
What county is zip code 21207 in?
Zip code 21207 is located in Baltimore County, Maryland. The primary city is Gwynn Oak.
What is the area code for zip code 21207?
Zip code 21207 in Gwynn Oak, MD uses area code 410. It is located in the Eastern (EST/EDT) timezone.
Is zip code 21207 a good place to live?
Zip code 21207 (Gwynn Oak, MD) has a cost of living index of 83 (100 = national average), a median household income of $64,284, and median home values of $248,400. The median age is 38.5. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 21207?
The cost of living index for zip code 21207 (Gwynn Oak, MD) is 83, where 100 represents the national average. This area is below the national average. Median home value: $248,400.
What schools serve zip code 21207?
Zip code 21207 in Gwynn Oak, Maryland is served by the local school district of Baltimore County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.