21237 ZIP Code — Rosedale, MD
Baltimore County, Maryland
ZIP code 21237 is located in Rosedale, Maryland, within Baltimore County. It covers approximately 11.25 square miles and serves a population of 30,983 residents. This is a po box ZIP code in the Eastern (ET) timezone, served by area code 410/443.
About ZIP code 21237
The housing stock consists of a mix of housing types. Most homes were built in the 1950s, giving the area an established character. Median home value is $268,400. Owner-occupancy sits near the national average at 64%.
Median household income is $84,118. 31% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 28 minutes is near the national average.
Educational attainment is near the national average, with 28% of residents holding a bachelor's degree or higher.
30,983
population
11.25
sq mi land
PO Box
ZIP type
Eastern (ET)
timezone
21237 ZIP code map
Cities in ZIP code 21237
Below are the cities the US Postal Service accepts for ZIP code 21237. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Rosedale | Acceptable |
| Rosedale | Preferred |
Nearby ZIP codes
21206 Baltimore (2.2 mi)
21236 Nottingham (3.5 mi)
21214 Baltimore (3.7 mi)
21234 Parkville (4.1 mi)
21221 Essex (4.4 mi)
21205 Baltimore (4.5 mi)
21213 Baltimore (4.5 mi)
21251 Baltimore (4.7 mi)
21224 Baltimore (4.7 mi)
21220 Middle River (5 mi)
21239 Baltimore (5.2 mi)
21128 Perry Hall (5.4 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 30,983 |
| Population density | 2,754 / sq mi |
| State FIPS | 24 |
| County FIPS | 005 |
| Geography | |
|---|---|
| Land area | 11.25 sq mi |
| Water area | 0.24 sq mi |
| Latitude | 39.3391 |
| Longitude | -76.4950 |
| Timezone | Eastern (ET) |
| Area code | 410/443 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 26.5% | 31.4% | 28.2% |
| $50k – $100k | 36.1% | 30.7% | 28.2% |
| $100k – $200k | 33.4% | 28.5% | 30.1% |
| Over $200k | 4.0% | 9.5% | 13.4% |
Demographics & statistics
30,983
Population
2,754
People per sq mi
40.5
Median age
$84,118
Median household income
$40,463
Per capita income
$268,400
Median home value
$1,396
Median monthly rent
64.2%
Home ownership
9.0%
Poverty rate
5.4%
Unemployment
8,736
Housing units
27.6%
Bachelor's or higher
Age distribution
Male
Female
853
Under 5
918
667
5–9
717
753
10–14
811
611
15–19
657
1,021
20–24
1,100
2,322
25–34
2,499
2,138
35–44
2,302
1,905
45–54
2,050
971
55–59
1,045
1,124
60–64
1,210
1,603
65–74
1,725
599
75–84
645
355
85+
382
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 5,524 | 17.8% |
| 18 and over | 25,459 | 82.2% |
| 65 and over | 5,309 | 17.1% |
| Median age | 40.5 years | |
Race & ethnicity
White
42.2%
Black or African American
36.5%
Asian
8.1%
Hispanic or Latino
5%
Two or more races
4.7%
Other race
2.7%
Native Hawaiian / Pacific Islander
0.4%
American Indian / Alaska Native
0.3%
| Group | Count | % |
|---|---|---|
| White | 13,767 | 42.2% |
| Black or African American | 11,904 | 36.5% |
| Asian | 2,630 | 8.1% |
| Hispanic or Latino | 1,616 | 5% |
| Two or more races | 1,541 | 4.7% |
| Other race | 895 | 2.7% |
| Native Hawaiian / Pacific Islander | 132 | 0.4% |
| American Indian / Alaska Native | 114 | 0.3% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 26.5% | 31.4% | 28.2% |
| $50k – $100k | 36.1% | 30.7% | 28.2% |
| $100k – $200k | 33.4% | 28.5% | 30.1% |
| Over $200k | 4.0% | 9.5% | 13.4% |
Under $10k
5.4%
$10k–$15k
1.5%
$15k–$25k
6.6%
$25k–$35k
4.5%
$35k–$50k
8.9%
$50k–$75k
17.5%
$75k–$100k
14.0%
$100k–$150k
22.9%
$150k–$200k
10.8%
$200k+
7.8%
| Range | % of households |
|---|---|
| Under $10k | 5.4% |
| $10k–$15k | 1.5% |
| $15k–$25k | 6.6% |
| $25k–$35k | 4.5% |
| $35k–$50k | 8.9% |
| $50k–$75k | 17.5% |
| $75k–$100k | 14.0% |
| $100k–$150k | 22.9% |
| $150k–$200k | 10.8% |
| $200k+ | 7.8% |
| Median income | $84,118 |
Housing
Home values
Under $50k
4.6%
$50k–$100k
1.2%
$100k–$150k
3.4%
$150k–$200k
11.6%
$200k–$300k
45.2%
$300k–$500k
27.9%
$500k–$1M
4.5%
$1M+
1.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $268,400 |
| Median rent / month | $1,396 |
| Owner occupied | 64.2% |
| Renter occupied | 35.8% |
| Vacant | 7.5% |
| Single-family detached | 50.9% |
| Large apartment buildings | 5.1% |
| Mobile homes | 0.6% |
| Median rooms | 6.1 |
| Avg household size (owned) | 2.74 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.8% |
| 2010–2019 | 3.8% |
| 2000–2009 | 11.0% |
| 1990–1999 | 16.8% |
| 1980–1989 | 14.6% |
| 1970–1979 | 17.1% |
| 1960–1969 | 12.7% |
| 1950–1959 | 17.3% |
| 1940–1949 | 2.2% |
| 1939 or earlier | 3.9% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.3% |
| 1 bedroom | 15.2% |
| 2 bedrooms | 25.7% |
| 3 bedrooms | 38.4% |
| 4 bedrooms | 16.7% |
| 5+ bedrooms | 3.8% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 6.6% |
| 1 vehicle | 35.9% |
| 2 vehicles | 37.0% |
| 3 or more | 20.5% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 56.2% |
| Electricity | 36.8% |
| Propane / LP gas | 1.8% |
| Fuel oil | 4.5% |
| Wood | 0.2% |
| No fuel used | 0.5% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 5,024 | 41.6% |
| Cohabiting couple | 668 | 5.5% |
| Male householder, no spouse | 2,347 | 19.4% |
| Female householder, no spouse | 4,034 | 33.4% |
| Households with children under 18 | 3,475 | 28.8% |
| Households with seniors (65+) | 3,852 | 31.9% |
| Average household size | 2.53 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 37.9% | 36.7% |
| Married | 44.4% | 42.2% |
| Separated | 1.1% | 1.1% |
| Widowed | 5.6% | 9.6% |
| Divorced | 11.1% | 10.3% |
Education
Less than 9th grade
3.8%
Some HS, no diploma
5.2%
HS graduate
29.7%
Some college, no degree
24.3%
Associate's degree
9.4%
Bachelor's degree
16.6%
Graduate / professional
11.0%
| Metric | % |
|---|---|
| HS diploma or higher | 91.1% |
| Bachelor's or higher | 27.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 437 | 6.6% |
| Kindergarten | 261 | 3.9% |
| Elementary school | 2,276 | 34.4% |
| High school | 1,209 | 18.3% |
| College / grad school | 2,425 | 36.7% |
Employment
Industry of employment
Education & healthcare
28.6%
Retail trade
12.3%
Professional & management
11.7%
Transportation & utilities
9.8%
Public administration
7.6%
Construction
7.2%
Other services
6.8%
Manufacturing
5.7%
Finance & real estate
4.0%
Arts, food & hospitality
3.3%
Information
1.7%
Wholesale trade
1.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 39.3% |
| Service | 17.0% |
| Sales & office | 20.9% |
| Natural resources & construction | 8.8% |
| Production & transportation | 14.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 79.0% |
| Government | 16.7% |
| Self-employed | 4.1% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 73.0% |
| Carpool | 9.1% |
| Public transit | 2.8% |
| Walk | 3.1% |
| Work from home | 9.3% |
| Other means | 2.8% |
| Avg commute (minutes) | 27.7 |
Poverty
All people
9.0%
Under 18 years
9.3%
18 and over
8.9%
Married-couple families
3.6%
Female-led households
8.7%
Income support
| Source | % of households |
|---|---|
| Social Security | 31.0% |
| Retirement income | 26.3% |
| Supplemental Security | 4.5% |
| Cash public assistance | 4.9% |
| Food stamps / SNAP | 12.4% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 31.0% |
| High blood pressure | 33.1% |
| High cholesterol | 31.7% |
| Diabetes | 8.8% |
| Heart disease | 5.3% |
| Stroke | 2.7% |
| Asthma | 9.9% |
| Arthritis | 23.4% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.4% |
| Cancer | 6.3% |
| Behavior / access | % |
|---|---|
| Smoking | 15.0% |
| Binge drinking | 15.1% |
| No physical activity | 23.0% |
| Less than 7 hrs sleep | 33.7% |
| Depression | 18.6% |
| Fair or poor health | 12.7% |
| Poor mental health | 14.8% |
| Poor physical health | 8.2% |
| No health insurance | 11.5% |
| Visited doctor (checkup) | 76.1% |
| Visited dentist | 63.7% |
| Cholesterol screening | 91.8% |
| Teeth loss | 11.2% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,854 | 7.3% |
| Disability | % |
|---|---|
| Any disability | 12.9% |
| Under 18 | 4.5% |
| 18–64 years | 11.8% |
| 65 and over | 26.2% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 71.7% |
| Public insurance | 37.6% |
| No insurance | 5.7% |
| Uninsured under 19 | 7.4% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 29,212 | 94.3% |
| Spanish | 2,216 | 7.6% |
| Other Indo-European | 584 | 2.0% |
| Asian & Pacific Islander | 853 | 2.9% |
| Other languages | 382 | 1.3% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 25,327 | 81.7% |
| Born in same state | 24,880 | 80.3% |
| Born in different state | 19,455 | 62.8% |
| Foreign born | 447 | 1.4% |
| Naturalized citizen | 5,656 | 18.3% |
| Not a US citizen | 3,473 | 61.4% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 2,871 | 9.3% |
| Arab | 1,223 | 3.9% |
| French | 1,121 | 3.6% |
| English | 202 | 0.7% |
| Ancestry | Count | % |
|---|---|---|
| Irish | 55 | 0.2% |
| Polish | 33 | 0.1% |
| Norwegian | 31 | 0.1% |
| German | 13 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 39.0% |
| Internet access | 94.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 21237
What city is ZIP code 21237 in?
ZIP code 21237 is primarily assigned to Rosedale, Maryland.
What county is ZIP code 21237 in?
ZIP code 21237 falls within Baltimore County, Maryland.
What is the population of ZIP code 21237?
ZIP code 21237 has an estimated population of 30,983 residents, with a density of 2,753 people per square mile.
What is the median household income in ZIP code 21237?
The median household income in ZIP code 21237 is $84,118, above the national median of ~$75,000.
What is the typical home value in ZIP code 21237?
The median home value in ZIP code 21237 is $268,400.
What timezone is ZIP code 21237 in?
ZIP code 21237 observes the EST timezone.