21157 ZIP Code — Westminster, MD
Carroll County, Maryland
ZIP code 21157 is located in Westminster, Maryland, within Carroll County. It covers approximately 77.69 square miles and serves a population of 39,816 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410/667.
About ZIP code 21157
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $375,700. Owner-occupancy sits near the national average at 74%.
Median household income is $96,406. 35% 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 31 minutes is near the national average.
Educational attainment is near the national average, with 36% of residents holding a bachelor's degree or higher.
39,816
population
77.69
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
21157 ZIP code map
Cities in ZIP code 21157
Below are the cities the US Postal Service accepts for ZIP code 21157. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Westminster | Acceptable |
| Westminster | Preferred |
Nearby ZIP codes
21158 Westminster (5.8 mi)
21048 Finksburg (6.1 mi)
21776 New Windsor (6.6 mi)
21074 Hampstead (8.4 mi)
21155 Upperco (9.9 mi)
21791 Union Bridge (10.6 mi)
21136 Reisterstown (11.3 mi)
21136 Reisterstown (11.3 mi)
21784 Sykesville (11.3 mi)
21102 Manchester (11.8 mi)
21787 Taneytown (12.1 mi)
21117 Owings Mills (13.6 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 39,816 |
| Population density | 512 / sq mi |
| State FIPS | 24 |
| County FIPS | 013 |
| Geography | |
|---|---|
| Land area | 77.69 sq mi |
| Water area | 0.15 sq mi |
| Latitude | 39.5553 |
| Longitude | -76.9905 |
| Timezone | Eastern (ET) |
| Area code | 443/410/667 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 30.2% | 23.8% | 28.2% |
| $50k – $100k | 24.7% | 26.3% | 28.2% |
| $100k – $200k | 35.9% | 37.1% | 30.1% |
| Over $200k | 9.1% | 12.8% | 13.4% |
Demographics & statistics
39,816
Population
512
People per sq mi
41.1
Median age
$96,406
Median household income
$43,729
Per capita income
$375,700
Median home value
$1,147
Median monthly rent
74.2%
Home ownership
7.7%
Poverty rate
3.6%
Unemployment
11,555
Housing units
35.9%
Bachelor's or higher
Age distribution
Male
Female
800
Under 5
829
946
5–9
980
1,416
10–14
1,468
1,515
15–19
1,570
1,553
20–24
1,609
2,125
25–34
2,202
2,346
35–44
2,431
2,511
45–54
2,603
1,412
55–59
1,464
1,330
60–64
1,378
2,102
65–74
2,178
917
75–84
951
579
85+
601
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 7,831 | 19.7% |
| 18 and over | 31,985 | 80.3% |
| 65 and over | 7,328 | 18.4% |
| Median age | 41.1 years | |
Race & ethnicity
White
85.5%
Hispanic or Latino
4.2%
Black or African American
3.7%
Two or more races
3.6%
Other race
1.9%
Asian
0.8%
American Indian / Alaska Native
0.2%
| Group | Count | % |
|---|---|---|
| White | 35,549 | 85.5% |
| Hispanic or Latino | 1,766 | 4.2% |
| Black or African American | 1,538 | 3.7% |
| Two or more races | 1,512 | 3.6% |
| Other race | 810 | 1.9% |
| Asian | 329 | 0.8% |
| American Indian / Alaska Native | 75 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 30.2% | 23.8% | 28.2% |
| $50k – $100k | 24.7% | 26.3% | 28.2% |
| $100k – $200k | 35.9% | 37.1% | 30.1% |
| Over $200k | 9.1% | 12.8% | 13.4% |
Under $10k
3.3%
$10k–$15k
3.3%
$15k–$25k
5.1%
$25k–$35k
7.0%
$35k–$50k
8.4%
$50k–$75k
13.8%
$75k–$100k
10.7%
$100k–$150k
19.4%
$150k–$200k
14.6%
$200k+
14.4%
| Range | % of households |
|---|---|
| Under $10k | 3.3% |
| $10k–$15k | 3.3% |
| $15k–$25k | 5.1% |
| $25k–$35k | 7.0% |
| $35k–$50k | 8.4% |
| $50k–$75k | 13.8% |
| $75k–$100k | 10.7% |
| $100k–$150k | 19.4% |
| $150k–$200k | 14.6% |
| $200k+ | 14.4% |
| Median income | $96,406 |
Housing
Home values
Under $50k
1.1%
$50k–$100k
0.2%
$100k–$150k
2.3%
$150k–$200k
5.3%
$200k–$300k
20.4%
$300k–$500k
48.8%
$500k–$1M
19.0%
$1M+
2.9%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $375,700 |
| Median rent / month | $1,147 |
| Owner occupied | 74.2% |
| Renter occupied | 25.8% |
| Vacant | 4.6% |
| Single-family detached | 70.9% |
| Large apartment buildings | 4.2% |
| Mobile homes | 0.2% |
| Median rooms | 6.8 |
| Avg household size (owned) | 2.79 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.1% |
| 2010–2019 | 3.7% |
| 2000–2009 | 11.0% |
| 1990–1999 | 15.4% |
| 1980–1989 | 14.4% |
| 1970–1979 | 17.5% |
| 1960–1969 | 12.7% |
| 1950–1959 | 6.7% |
| 1940–1949 | 3.4% |
| 1939 or earlier | 15.1% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.3% |
| 1 bedroom | 10.9% |
| 2 bedrooms | 16.6% |
| 3 bedrooms | 40.6% |
| 4 bedrooms | 25.4% |
| 5+ bedrooms | 6.2% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 8.2% |
| 1 vehicle | 22.0% |
| 2 vehicles | 37.7% |
| 3 or more | 32.1% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 19.0% |
| Electricity | 49.0% |
| Propane / LP gas | 4.8% |
| Fuel oil | 21.3% |
| Wood | 2.7% |
| Solar | 0.1% |
| No fuel used | 1.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 8,255 | 56.4% |
| Cohabiting couple | 797 | 5.4% |
| Male householder, no spouse | 1,705 | 11.7% |
| Female householder, no spouse | 3,870 | 26.5% |
| Households with children under 18 | 4,182 | 28.6% |
| Households with seniors (65+) | 5,091 | 34.8% |
| Average household size | 2.58 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 33.4% | 26.9% |
| Married | 55.7% | 49.4% |
| Separated | 0.9% | 1.0% |
| Widowed | 3.1% | 11.0% |
| Divorced | 6.9% | 11.7% |
Education
Less than 9th grade
2.3%
Some HS, no diploma
5.7%
HS graduate
30.3%
Some college, no degree
18.4%
Associate's degree
7.4%
Bachelor's degree
22.1%
Graduate / professional
13.9%
| Metric | % |
|---|---|
| HS diploma or higher | 91.9% |
| Bachelor's or higher | 35.9% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 612 | 5.8% |
| Kindergarten | 352 | 3.4% |
| Elementary school | 4,092 | 39.1% |
| High school | 1,884 | 18.0% |
| College / grad school | 3,530 | 33.7% |
Employment
Industry of employment
Education & healthcare
24.6%
Retail trade
11.3%
Professional & management
10.6%
Construction
10.4%
Finance & real estate
7.8%
Public administration
7.8%
Arts, food & hospitality
7.2%
Other services
5.4%
Manufacturing
4.7%
Transportation & utilities
3.9%
Wholesale trade
3.0%
Information
2.4%
Agriculture & mining
0.8%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 45.4% |
| Service | 14.5% |
| Sales & office | 19.5% |
| Natural resources & construction | 10.4% |
| Production & transportation | 10.3% |
Employment type
| Type | % |
|---|---|
| Private sector | 77.6% |
| Government | 17.5% |
| Self-employed | 4.7% |
| Unpaid family workers | 0.2% |
Commute
| Method | % |
|---|---|
| Drive alone | 76.1% |
| Carpool | 8.6% |
| Public transit | 0.3% |
| Walk | 2.1% |
| Work from home | 12.1% |
| Other means | 0.7% |
| Avg commute (minutes) | 31.3 |
Poverty
All people
7.7%
Under 18 years
8.2%
18 and over
7.5%
Married-couple families
2.5%
Female-led households
15.4%
Income support
| Source | % of households |
|---|---|
| Social Security | 35.2% |
| Retirement income | 26.6% |
| Supplemental Security | 4.1% |
| Cash public assistance | 1.2% |
| Food stamps / SNAP | 9.7% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 30.5% |
| High blood pressure | 32.4% |
| High cholesterol | 34.2% |
| Diabetes | 9.0% |
| Heart disease | 5.5% |
| Stroke | 2.6% |
| Asthma | 9.4% |
| Arthritis | 24.8% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.9% |
| Cancer | 7.0% |
| Behavior / access | % |
|---|---|
| Smoking | 14.6% |
| Binge drinking | 16.1% |
| No physical activity | 19.4% |
| Less than 7 hrs sleep | 27.6% |
| Depression | 18.7% |
| Fair or poor health | 11.2% |
| Poor mental health | 13.7% |
| Poor physical health | 8.4% |
| No health insurance | 9.2% |
| Visited doctor (checkup) | 77.1% |
| Visited dentist | 67.9% |
| Cholesterol screening | 91.6% |
| Teeth loss | 9.9% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 2,201 | 6.9% |
| Disability | % |
|---|---|
| Any disability | 14.9% |
| Under 18 | 6.9% |
| 18–64 years | 11.7% |
| 65 and over | 34.5% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 80.4% |
| Public insurance | 32.1% |
| No insurance | 3.8% |
| Uninsured under 19 | 1.4% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 38,187 | 95.9% |
| Spanish | 499 | 1.3% |
| Other Indo-European | 396 | 1.0% |
| Asian & Pacific Islander | 50 | 0.1% |
| Other languages | 29 | 0.1% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 38,018 | 95.5% |
| Born in same state | 37,618 | 94.5% |
| Born in different state | 26,773 | 67.2% |
| Foreign born | 400 | 1.0% |
| Naturalized citizen | 1,798 | 4.5% |
| Not a US citizen | 665 | 37.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 7,184 | 18% |
| French | 5,612 | 14.1% |
| Arab | 4,529 | 11.4% |
| English | 367 | 0.9% |
| German | 130 | 0.3% |
| Ancestry | Count | % |
|---|---|---|
| Norwegian | 130 | 0.3% |
| Polish | 115 | 0.3% |
| Irish | 101 | 0.3% |
| Dutch | 92 | 0.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 36.7% |
| Internet access | 90.3% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 21157
What city is ZIP code 21157 in?
ZIP code 21157 is primarily assigned to Westminster, Maryland.
What county is ZIP code 21157 in?
ZIP code 21157 falls within Carroll County, Maryland.
What is the typical home value in ZIP code 21157?
The median home value in ZIP code 21157 is $375,700.
Does ZIP code 21157 have a large retiree population?
35% of households in ZIP code 21157 receive Social Security income, suggesting a significant retiree or disability population.
What is the population of ZIP code 21157?
ZIP code 21157 has an estimated population of 39,816 residents, with a density of 512 people per square mile.
What is the median household income in ZIP code 21157?
The median household income in ZIP code 21157 is $96,406, above the national median of ~$75,000.
What timezone is ZIP code 21157 in?
ZIP code 21157 observes the EST timezone.