21204 ZIP Code — Towson, MD
Baltimore County, Maryland
ZIP code 21204 is located in Towson, Maryland, within Baltimore County. It covers approximately 6.26 square miles and serves a population of 20,188 residents. This is a po box ZIP code in the Eastern (ET) timezone, served by area code 410/443/667.
About ZIP code 21204
The housing stock consists of a significant share of large multi-unit buildings. Most homes were built in the 1950s, giving the area an established character. Median home value is $524,900. Owner-occupancy sits near the national average at 48%.
The gap between median ($92,734) and mean household income suggests income inequality — a small number of higher earners pull the average up.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 26 minutes is near the national average.
Educational attainment is high — 68% of residents hold a bachelor's degree or higher, well above the national average of 33%.
20,188
population
6.26
sq mi land
PO Box
ZIP type
Eastern (ET)
timezone
21204 ZIP code map
Cities in ZIP code 21204
Below are the cities the US Postal Service accepts for ZIP code 21204. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Towson | Acceptable |
| Towson | Acceptable |
| Towson | Preferred |
Nearby ZIP codes
21252 Towson (1.3 mi)
21093 Lutherville Timonium (2.5 mi)
21212 Baltimore (2.6 mi)
21210 Baltimore (3.1 mi)
21209 Baltimore (3.1 mi)
21286 Towson (3.4 mi)
21239 Baltimore (3.6 mi)
21215 Baltimore (4.9 mi)
21251 Baltimore (4.9 mi)
21211 Baltimore (5.1 mi)
21208 Pikesville (5.1 mi)
21214 Baltimore (5.2 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 20,188 |
| Population density | 3,225 / sq mi |
| State FIPS | 24 |
| County FIPS | 005 |
| Geography | |
|---|---|
| Land area | 6.26 sq mi |
| Water area | 0.10 sq mi |
| Latitude | 39.4019 |
| Longitude | -76.6328 |
| Timezone | Eastern (ET) |
| Area code | 410/443/667 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 30.9% | 31.4% | 28.2% |
| $50k – $100k | 25.1% | 30.7% | 28.2% |
| $100k – $200k | 27.2% | 28.5% | 30.1% |
| Over $200k | 16.9% | 9.5% | 13.4% |
Demographics & statistics
20,188
Population
3,225
People per sq mi
34.8
Median age
$92,734
Median household income
$62,133
Per capita income
$524,900
Median home value
$1,849
Median monthly rent
48.4%
Home ownership
13.5%
Poverty rate
3.1%
Unemployment
5,054
Housing units
67.6%
Bachelor's or higher
Age distribution
Male
Female
258
Under 5
312
346
5–9
418
531
10–14
640
676
15–19
816
1,406
20–24
1,696
1,377
25–34
1,660
806
35–44
973
919
45–54
1,109
534
55–59
645
428
60–64
516
856
65–74
1,033
553
75–84
666
460
85+
554
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 3,206 | 15.9% |
| 18 and over | 16,982 | 84.1% |
| 65 and over | 4,122 | 20.4% |
| Median age | 34.8 years | |
Race & ethnicity
White
68.3%
Black or African American
17.1%
Asian
5.9%
Two or more races
5.5%
Hispanic or Latino
2.5%
Other race
0.6%
American Indian / Alaska Native
0.2%
| Group | Count | % |
|---|---|---|
| White | 14,131 | 68.3% |
| Black or African American | 3,534 | 17.1% |
| Asian | 1,222 | 5.9% |
| Two or more races | 1,129 | 5.5% |
| Hispanic or Latino | 509 | 2.5% |
| Other race | 120 | 0.6% |
| American Indian / Alaska Native | 47 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 30.9% | 31.4% | 28.2% |
| $50k – $100k | 25.1% | 30.7% | 28.2% |
| $100k – $200k | 27.2% | 28.5% | 30.1% |
| Over $200k | 16.9% | 9.5% | 13.4% |
Under $10k
9.2%
$10k–$15k
2.3%
$15k–$25k
3.5%
$25k–$35k
6.1%
$35k–$50k
5.6%
$50k–$75k
15.1%
$75k–$100k
12.3%
$100k–$150k
14.0%
$150k–$200k
11.2%
$200k+
20.7%
| Range | % of households |
|---|---|
| Under $10k | 9.2% |
| $10k–$15k | 2.3% |
| $15k–$25k | 3.5% |
| $25k–$35k | 6.1% |
| $35k–$50k | 5.6% |
| $50k–$75k | 15.1% |
| $75k–$100k | 12.3% |
| $100k–$150k | 14.0% |
| $150k–$200k | 11.2% |
| $200k+ | 20.7% |
| Median income | $92,734 |
Housing
Home values
Under $50k
0.8%
$50k–$100k
0.1%
$100k–$150k
1.2%
$150k–$200k
5.3%
$200k–$300k
10.7%
$300k–$500k
29.1%
$500k–$1M
42.9%
$1M+
9.9%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $524,900 |
| Median rent / month | $1,849 |
| Owner occupied | 48.4% |
| Renter occupied | 51.6% |
| Vacant | 10.0% |
| Single-family detached | 34.8% |
| Large apartment buildings | 33.9% |
| Mobile homes | 0.1% |
| Median rooms | 5.1 |
| Avg household size (owned) | 2.40 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 11.1% |
| 2000–2009 | 12.3% |
| 1990–1999 | 9.3% |
| 1980–1989 | 9.9% |
| 1970–1979 | 12.8% |
| 1960–1969 | 15.5% |
| 1950–1959 | 17.4% |
| 1940–1949 | 4.4% |
| 1939 or earlier | 7.3% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 5.2% |
| 1 bedroom | 20.7% |
| 2 bedrooms | 31.0% |
| 3 bedrooms | 21.0% |
| 4 bedrooms | 15.5% |
| 5+ bedrooms | 6.6% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 5.8% |
| 1 vehicle | 46.1% |
| 2 vehicles | 36.9% |
| 3 or more | 11.3% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 49.1% |
| Electricity | 42.8% |
| Propane / LP gas | 1.5% |
| Fuel oil | 5.8% |
| Wood | 0.1% |
| Solar | 0.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 3,059 | 36.0% |
| Cohabiting couple | 502 | 5.9% |
| Male householder, no spouse | 1,580 | 18.6% |
| Female householder, no spouse | 3,360 | 39.5% |
| Households with children under 18 | 1,860 | 21.9% |
| Households with seniors (65+) | 2,711 | 31.9% |
| Average household size | 2.10 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 46.4% | 43.5% |
| Married | 39.9% | 34.3% |
| Separated | 2.9% | 0.1% |
| Widowed | 1.6% | 14.0% |
| Divorced | 9.2% | 8.1% |
Education
Less than 9th grade
1.4%
Some HS, no diploma
3.1%
HS graduate
11.2%
Some college, no degree
12.0%
Associate's degree
4.8%
Bachelor's degree
33.7%
Graduate / professional
33.9%
| Metric | % |
|---|---|
| HS diploma or higher | 95.6% |
| Bachelor's or higher | 67.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 264 | 4.0% |
| Kindergarten | 160 | 2.5% |
| Elementary school | 1,617 | 24.8% |
| High school | 917 | 14.1% |
| College / grad school | 3,563 | 54.6% |
Employment
Industry of employment
Education & healthcare
33.1%
Professional & management
17.2%
Arts, food & hospitality
10.0%
Finance & real estate
7.6%
Retail trade
7.3%
Transportation & utilities
5.2%
Other services
5.0%
Public administration
4.3%
Manufacturing
3.6%
Construction
2.7%
Information
2.3%
Wholesale trade
1.6%
Agriculture & mining
0.3%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 61.7% |
| Service | 12.6% |
| Sales & office | 19.8% |
| Natural resources & construction | 2.2% |
| Production & transportation | 3.8% |
Employment type
| Type | % |
|---|---|
| Private sector | 82.7% |
| Government | 14.3% |
| Self-employed | 3.0% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 68.9% |
| Carpool | 5.7% |
| Public transit | 2.1% |
| Walk | 3.9% |
| Work from home | 18.0% |
| Other means | 1.4% |
| Avg commute (minutes) | 26.4 |
Poverty
All people
13.5%
Under 18 years
5.3%
18 and over
15.2%
Married-couple families
2.2%
Female-led households
6.1%
Income support
| Source | % of households |
|---|---|
| Social Security | 29.7% |
| Retirement income | 22.3% |
| Supplemental Security | 1.4% |
| Cash public assistance | 1.5% |
| Food stamps / SNAP | 3.1% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 26.5% |
| High blood pressure | 30.0% |
| High cholesterol | 30.5% |
| Diabetes | 7.2% |
| Heart disease | 5.4% |
| Stroke | 2.6% |
| Asthma | 10.1% |
| Arthritis | 22.3% |
| Kidney disease | 2.7% |
| Pulmonary disease | 5.0% |
| Cancer | 7.3% |
| Behavior / access | % |
|---|---|
| Smoking | 11.4% |
| Binge drinking | 15.0% |
| No physical activity | 20.7% |
| Less than 7 hrs sleep | 29.2% |
| Depression | 19.6% |
| Fair or poor health | 11.6% |
| Poor mental health | 15.4% |
| Poor physical health | 7.6% |
| No health insurance | 9.9% |
| Visited doctor (checkup) | 76.6% |
| Visited dentist | 66.2% |
| Cholesterol screening | 88.6% |
| Teeth loss | 8.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 829 | 4.9% |
| Disability | % |
|---|---|
| Any disability | 10.3% |
| Under 18 | 1.2% |
| 18–64 years | 6.7% |
| 65 and over | 30.2% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 89.3% |
| Public insurance | 23.9% |
| No insurance | 1.8% |
| Uninsured under 19 | 0.9% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 19,618 | 97.2% |
| Spanish | 406 | 2.1% |
| Other Indo-European | 69 | 0.4% |
| Asian & Pacific Islander | 149 | 0.8% |
| Other languages | 165 | 0.8% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 18,172 | 90.0% |
| Born in same state | 18,010 | 89.2% |
| Born in different state | 11,110 | 55.0% |
| Foreign born | 162 | 0.8% |
| Naturalized citizen | 2,016 | 10.0% |
| Not a US citizen | 1,170 | 58.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 3,200 | 15.9% |
| French | 2,664 | 13.2% |
| Arab | 950 | 4.7% |
| English | 335 | 1.7% |
| Polish | 156 | 0.8% |
| Ancestry | Count | % |
|---|---|---|
| Norwegian | 107 | 0.5% |
| Irish | 102 | 0.5% |
| Dutch | 100 | 0.5% |
| German | 19 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 42.1% |
| Internet access | 98.5% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 21204
What city is ZIP code 21204 in?
ZIP code 21204 is primarily assigned to Towson, Maryland.
What county is ZIP code 21204 in?
ZIP code 21204 falls within Baltimore County, Maryland.
How educated is the population of ZIP code 21204?
68% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.
What is the typical home value in ZIP code 21204?
The median home value in ZIP code 21204 is $524,900.
What is the population of ZIP code 21204?
ZIP code 21204 has an estimated population of 20,188 residents, with a density of 3,224 people per square mile.
What is the median household income in ZIP code 21204?
The median household income in ZIP code 21204 is $92,734, above the national median of ~$75,000.
What timezone is ZIP code 21204 in?
ZIP code 21204 observes the EST timezone.