21133 ZIP Code — Randallstown, MD
Baltimore County, Maryland
ZIP code 21133 is located in Randallstown, Maryland, within Baltimore County. It covers approximately 8.96 square miles and serves a population of 32,070 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410.
About ZIP code 21133
The housing stock consists of a mix of housing types. Most homes were built in the 1960s, giving the area an established character. Median home value is $284,900. Owner-occupancy sits near the national average at 69%.
Median household income is $83,305. 37% 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 33 minutes is near the national average.
Educational attainment is near the national average, with 36% of residents holding a bachelor's degree or higher.
32,070
population
8.96
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
21133 ZIP code map
Cities in ZIP code 21133
Below are the cities the US Postal Service accepts for ZIP code 21133. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Randallstown | Acceptable |
| Randallstown | Preferred |
Nearby ZIP codes
21244 Windsor Mill (3.3 mi)
21163 Woodstock (3.4 mi)
21117 Owings Mills (4 mi)
21208 Pikesville (4.7 mi)
21104 Marriottsville (5.3 mi)
21235 Baltimore (6.2 mi)
21207 Gwynn Oak (6.3 mi)
21215 Baltimore (7.2 mi)
21136 Reisterstown (7.7 mi)
21136 Reisterstown (7.7 mi)
21209 Baltimore (7.7 mi)
21042 Ellicott City (8.2 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 32,070 |
| Population density | 3,579 / sq mi |
| State FIPS | 24 |
| County FIPS | 005 |
| Geography | |
|---|---|
| Land area | 8.96 sq mi |
| Water area | 0.01 sq mi |
| Latitude | 39.3752 |
| Longitude | -76.8138 |
| Timezone | Eastern (ET) |
| Area code | 443/410 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 31.6% | 31.4% | 28.2% |
| $50k – $100k | 34.3% | 30.7% | 28.2% |
| $100k – $200k | 28.9% | 28.5% | 30.1% |
| Over $200k | 5.2% | 9.5% | 13.4% |
Demographics & statistics
32,070
Population
3,579
People per sq mi
45.1
Median age
$83,305
Median household income
$38,898
Per capita income
$284,900
Median home value
$1,460
Median monthly rent
69.3%
Home ownership
10.8%
Poverty rate
6.2%
Unemployment
8,644
Housing units
36.4%
Bachelor's or higher
Age distribution
Male
Female
594
Under 5
746
644
5–9
808
977
10–14
1,226
848
15–19
1,063
899
20–24
1,127
1,400
25–34
1,757
1,725
35–44
2,165
2,145
45–54
2,691
1,172
55–59
1,470
1,152
60–64
1,446
1,639
65–74
2,056
770
75–84
966
259
85+
325
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 6,047 | 18.9% |
| 18 and over | 26,023 | 81.1% |
| 65 and over | 6,015 | 18.8% |
| Median age | 45.1 years | |
Race & ethnicity
Black or African American
76.3%
White
11.4%
Two or more races
4.5%
Hispanic or Latino
3.3%
Other race
2.3%
Asian
2%
American Indian / Alaska Native
0.2%
| Group | Count | % |
|---|---|---|
| Black or African American | 25,312 | 76.3% |
| White | 3,778 | 11.4% |
| Two or more races | 1,493 | 4.5% |
| Hispanic or Latino | 1,103 | 3.3% |
| Other race | 761 | 2.3% |
| Asian | 648 | 2% |
| American Indian / Alaska Native | 73 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 31.6% | 31.4% | 28.2% |
| $50k – $100k | 34.3% | 30.7% | 28.2% |
| $100k – $200k | 28.9% | 28.5% | 30.1% |
| Over $200k | 5.2% | 9.5% | 13.4% |
Under $10k
3.0%
$10k–$15k
2.6%
$15k–$25k
6.2%
$25k–$35k
9.3%
$35k–$50k
8.5%
$50k–$75k
15.3%
$75k–$100k
15.1%
$100k–$150k
20.0%
$150k–$200k
11.3%
$200k+
8.6%
| Range | % of households |
|---|---|
| Under $10k | 3.0% |
| $10k–$15k | 2.6% |
| $15k–$25k | 6.2% |
| $25k–$35k | 9.3% |
| $35k–$50k | 8.5% |
| $50k–$75k | 15.3% |
| $75k–$100k | 15.1% |
| $100k–$150k | 20.0% |
| $150k–$200k | 11.3% |
| $200k+ | 8.6% |
| Median income | $83,305 |
Housing
Home values
Under $50k
3.8%
$50k–$100k
0.7%
$100k–$150k
1.4%
$150k–$200k
4.8%
$200k–$300k
47.3%
$300k–$500k
38.4%
$500k–$1M
3.0%
$1M+
0.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $284,900 |
| Median rent / month | $1,460 |
| Owner occupied | 69.3% |
| Renter occupied | 30.7% |
| Vacant | 2.4% |
| Single-family detached | 52.8% |
| Large apartment buildings | 5.3% |
| Mobile homes | 0.1% |
| Median rooms | 6.7 |
| Avg household size (owned) | 2.79 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 3.8% |
| 2000–2009 | 9.2% |
| 1990–1999 | 17.7% |
| 1980–1989 | 13.7% |
| 1970–1979 | 17.8% |
| 1960–1969 | 20.2% |
| 1950–1959 | 11.1% |
| 1940–1949 | 3.7% |
| 1939 or earlier | 2.8% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.3% |
| 1 bedroom | 11.1% |
| 2 bedrooms | 15.3% |
| 3 bedrooms | 41.5% |
| 4 bedrooms | 26.7% |
| 5+ bedrooms | 4.1% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 9.2% |
| 1 vehicle | 36.0% |
| 2 vehicles | 32.0% |
| 3 or more | 22.8% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 59.7% |
| Electricity | 35.6% |
| Propane / LP gas | 1.0% |
| Fuel oil | 2.1% |
| Wood | 0.1% |
| Solar | 0.3% |
| No fuel used | 1.1% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 4,866 | 40.4% |
| Cohabiting couple | 482 | 4.0% |
| Male householder, no spouse | 1,379 | 11.4% |
| Female householder, no spouse | 5,324 | 44.2% |
| Households with children under 18 | 3,064 | 25.4% |
| Households with seniors (65+) | 4,306 | 35.7% |
| Average household size | 2.61 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 41.4% | 33.2% |
| Married | 46.3% | 36.3% |
| Separated | 2.6% | 6.3% |
| Widowed | 3.9% | 11.3% |
| Divorced | 5.8% | 12.9% |
Education
Less than 9th grade
3.5%
Some HS, no diploma
5.8%
HS graduate
24.5%
Some college, no degree
22.2%
Associate's degree
7.7%
Bachelor's degree
22.2%
Graduate / professional
14.2%
| Metric | % |
|---|---|
| HS diploma or higher | 90.7% |
| Bachelor's or higher | 36.4% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 211 | 2.7% |
| Kindergarten | 313 | 3.9% |
| Elementary school | 2,793 | 35.1% |
| High school | 1,583 | 19.9% |
| College / grad school | 3,049 | 38.4% |
Employment
Industry of employment
Education & healthcare
29.9%
Public administration
13.2%
Retail trade
10.4%
Professional & management
9.5%
Transportation & utilities
8.3%
Arts, food & hospitality
8.2%
Finance & real estate
5.7%
Other services
4.0%
Manufacturing
3.5%
Construction
3.1%
Information
2.5%
Wholesale trade
1.3%
Agriculture & mining
0.3%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 44.8% |
| Service | 19.5% |
| Sales & office | 19.7% |
| Natural resources & construction | 3.1% |
| Production & transportation | 13.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 68.9% |
| Government | 26.2% |
| Self-employed | 4.8% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 73.6% |
| Carpool | 8.5% |
| Public transit | 5.9% |
| Walk | 0.7% |
| Work from home | 9.4% |
| Other means | 1.9% |
| Avg commute (minutes) | 33.0 |
Poverty
All people
10.8%
Under 18 years
22.8%
18 and over
7.9%
Married-couple families
5.1%
Female-led households
13.6%
Income support
| Source | % of households |
|---|---|
| Social Security | 36.8% |
| Retirement income | 30.6% |
| Supplemental Security | 5.6% |
| Cash public assistance | 3.2% |
| Food stamps / SNAP | 13.7% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 37.8% |
| High blood pressure | 40.7% |
| High cholesterol | 30.6% |
| Diabetes | 11.9% |
| Heart disease | 5.0% |
| Stroke | 3.4% |
| Asthma | 11.1% |
| Arthritis | 24.7% |
| Kidney disease | 3.0% |
| Pulmonary disease | 4.7% |
| Cancer | 6.0% |
| Behavior / access | % |
|---|---|
| Smoking | 13.9% |
| Binge drinking | 12.3% |
| No physical activity | 24.4% |
| Less than 7 hrs sleep | 38.8% |
| Depression | 15.9% |
| Fair or poor health | 14.3% |
| Poor mental health | 14.2% |
| Poor physical health | 8.4% |
| No health insurance | 10.9% |
| Visited doctor (checkup) | 81.7% |
| Visited dentist | 63.1% |
| Cholesterol screening | 94.3% |
| Teeth loss | 11.5% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 2,189 | 8.4% |
| Disability | % |
|---|---|
| Any disability | 12.6% |
| Under 18 | 2.3% |
| 18–64 years | 9.6% |
| 65 and over | 33.9% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 71.0% |
| Public insurance | 41.1% |
| No insurance | 6.0% |
| Uninsured under 19 | 4.4% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 30,730 | 95.8% |
| Spanish | 1,584 | 5.2% |
| Other Indo-European | 745 | 2.4% |
| Asian & Pacific Islander | 266 | 0.9% |
| Other languages | 101 | 0.3% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 27,488 | 85.7% |
| Born in same state | 26,784 | 83.5% |
| Born in different state | 20,273 | 63.2% |
| Foreign born | 704 | 2.2% |
| Naturalized citizen | 4,582 | 14.3% |
| Not a US citizen | 2,729 | 59.6% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Arab | 1,069 | 3.3% |
| Italian | 701 | 2.2% |
| French | 660 | 2.1% |
| Irish | 54 | 0.2% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 27 | 0.1% |
| Dutch | 16 | 0% |
| English | 12 | 0% |
| German | 2 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 37.6% |
| Internet access | 96.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 21133
What city is ZIP code 21133 in?
ZIP code 21133 is primarily assigned to Randallstown, Maryland.
What county is ZIP code 21133 in?
ZIP code 21133 falls within Baltimore County, Maryland.
Does ZIP code 21133 have a large retiree population?
37% of households in ZIP code 21133 receive Social Security income, suggesting a significant retiree or disability population.
What is the population of ZIP code 21133?
ZIP code 21133 has an estimated population of 32,070 residents, with a density of 3,579 people per square mile.
What is the typical home value in ZIP code 21133?
The median home value in ZIP code 21133 is $284,900.
What is the median household income in ZIP code 21133?
The median household income in ZIP code 21133 is $83,305, above the national median of ~$75,000.
What timezone is ZIP code 21133 in?
ZIP code 21133 observes the EST timezone.