Zip Code 21237
Rosedale, Maryland — Baltimore County
📍 ZIP code 21237 is in Rosedale, Baltimore County, Maryland.
ZIP code 21237 is located in Rosedale, Baltimore County, Maryland. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 30,851. The area code for ZIP code 21237 is 410.
Quick Answer
Zip code 21237 is in Rosedale, Maryland (Baltimore County). It has a population of 30,851, median household income of $90,269, and median home value of $280,400.
Population
30,851
Income
$90,269
Home Value
$280,400
Climate
90°F / 30°F
About Zip Code 21237
Zip code 21237 is located in Rosedale, Maryland, within Baltimore County. Home to approximately 30,851 residents, this area sits at an elevation of 146 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 410.
The median household income is $90,269 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $280,400, and the cost of living index is 102 (2% above the national average of 100).
Summers average a high of 90°F while winters drop to 30°F. The area receives about 44 in of rain and 8 in of snow annually. The zip code covers 11.5 square miles of land area and 0.3 square miles of water.
Key Statistics
30,851
$90,269
$280,400
Eastern (EST/EDT)
410
146 ft
11.5 sq mi
42.3
13,171
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Compare With Nearby Zip Codes
| Metric | 21237 | 21206 | 21236 | 21214 | 21234 | 21205 |
|---|---|---|---|---|---|---|
| City | Rosedale, MD | Baltimore, MD | Nottingham, MD | Baltimore, MD | Parkville, MD | Baltimore, MD |
| Population | 30,851 | 49,901 | 39,653 | 21,295 | 65,010 | 13,665 |
| Median Income | $90,269 | $62,965 | $92,130 | $82,093 | $83,139 | $38,723 |
| Home Value | $280,400 | $213,700 | $306,800 | $250,700 | $276,000 | $94,900 |
| Cost of Living | 102 | 75 | 111 | 91 | 99 | 60 |
| Median Age | 42.3 | 36.5 | 38.2 | 41.6 | 40.7 | 34.8 |
Cost of Living
100 = National Average. Rosedale's cost of living is 2% above the national average.
vs. State Avg
Above
Affordability
Moderate
Income-to-Home
3.1x
Demographics
Zip code 21237 has a population of 30,851 people with a median age of 42.3. There are 13,171 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Rosedale (21237) population trend from 2010 to 2024
↑ 49.4%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
90°F
30°F
44 in
8 in
Rosedale experiences hot summers with average highs around 90°F. Winters are cool with lows averaging 30°F. The area receives about 8 in of snow per year.
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Housing & Economy
Median Home Value
$280,400
Median Household Income
$90,269
With 13,171 housing units across 11.5 square miles, 21237 has a housing density of 1,145 units per square mile. The home price-to-income ratio is 3.1x.
Location & Geography
Latitude
39.3415°
Longitude
-76.4953°
Land Area
11.5 sq mi
Water Area
0.3 sq mi
Nearby Zip Codes
Zip codes closest to 21237 (Rosedale, MD) with distances:
Related Cities in Maryland
Explore zip codes in other Maryland cities:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 21237's $90,269. A way to compare Rosedale 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 21237 (Rosedale, 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 Rosedale, Maryland?
Rosedale, Maryland uses zip code 21237.
What county is zip code 21237 in?
Zip code 21237 is located in Baltimore County, Maryland.
What is the population of zip code 21237?
The population of zip code 21237 is 30,851 with a median age of 42.3.
Is 21237 in Rosedale, Maryland?
Yes, zip code 21237 is in Rosedale, Baltimore County, Maryland. The area code is 410.
Frequently Asked Questions
What city is zip code 21237 in?
Zip code 21237 is in Rosedale, Maryland. It is part of Baltimore County and uses the Eastern (EST/EDT) timezone.
What is zip code 21237?
Zip code 21237 is a U.S. postal code in Rosedale, Maryland (Baltimore County). It has a population of 30,851 and covers 11.5 square miles.
What is the population of zip code 21237?
The population of zip code 21237 (Rosedale, MD) is 30,851 with a median age of 42.3. There are approximately 13,171 housing units in this area.
What is the median income in zip code 21237?
The median household income in zip code 21237 (Rosedale, MD) is $90,269 per year. The cost of living index is 102 (100 = national average).
What is the average home price in zip code 21237?
The median home value in zip code 21237 (Rosedale, MD) is $280,400. The cost of living index is 102 compared to the national average of 100.
What county is zip code 21237 in?
Zip code 21237 is located in Baltimore County, Maryland. The primary city is Rosedale.
What is the area code for zip code 21237?
Zip code 21237 in Rosedale, MD uses area code 410. It is located in the Eastern (EST/EDT) timezone.
Is zip code 21237 a good place to live?
Zip code 21237 (Rosedale, MD) has a cost of living index of 102 (100 = national average), a median household income of $90,269, and median home values of $280,400. The median age is 42.3. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 21237?
The cost of living index for zip code 21237 (Rosedale, MD) is 102, where 100 represents the national average. This area is above the national average. Median home value: $280,400.
What schools serve zip code 21237?
Zip code 21237 in Rosedale, 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.