ZIP code 21157 is in Carroll County, Maryland. About 38,984 people live here in 14,785 households. The median home value is $424,100 and the median household income $104,966. The average commute takes about 34 minutes.
ZIP code tabulation area · ACS 2020–2024 · Updated October 24, 2026
91%of households have broadbandhome internet subscription
21157 in MarylandZIP codes coloured by median household income
21157
<$45K$125K+
Sources: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates · U.S. Census Bureau, 2024 Gazetteer and 2020 ZCTA relationship files
People.
38,984 residents in 14,785 households, next to the Carroll County figure.
19%
under 18
HereCarroll County
21%
aged 18–34
HereCarroll County
20%
aged 65 and over
HereCarroll County
25%
of households are people living alone
HereCarroll County
57%
of households are married couples
HereCarroll County
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates
Homes.
15,471 housing units; the median owner-occupied home is valued at $424,100 (±$12,444).
77%
of households own their home
HereCarroll County
72%
of homes are detached single-family houses
HereCarroll County
12%
are in buildings with 5 or more units
HereCarroll County
0%
are mobile homes
HereCarroll County
4%
of housing units are vacant
HereCarroll County
$1,331
median gross rent a month
HereCarroll County
When homes were built
2020 or later1%
2010–20194%
2000–200913%
1990–199913%
1980–198915%
1970–197919%
1960–196913%
1950–19594%
1940–19493%
1939 or earlier16%
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates
Income and work.
Household income and work, in 2024 dollars; median household income ±$9,822.
$104,966
median household income
HereCarroll County
6.7%
of people live below the poverty line
HereCarroll County
4.1%
unemployment rate
HereCarroll County
38%
of adults 25+ hold a bachelor’s degree or higher
HereCarroll County
The poverty rate uses the federal poverty thresholds, which vary with family size. It says nothing on its own about what a neighborhood is like to live in.
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates
Getting around.
How workers aged 16 and over get to work, and how long it takes.
34 min
average commute to work
HereCarroll County
33%
of commuters travel 45 minutes or more
HereCarroll County
78%
of workers drive or carpool
HereCarroll County
0%
take public transportation
HereCarroll County
3%
walk or bike
HereCarroll County
18%
work from home
HereCarroll County
6%
of households have no car
HereCarroll County
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates
Internet.
Home internet subscriptions.
91%
of households have a broadband subscription
HereCarroll County
8%
have no internet access at home
HereCarroll County
American Community Survey figures are estimates from a rolling sample, averaged over 2020–2024. Each comes with a margin of error, which is wider in places with fewer people.
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates
Businesses in 21157.
1,303 business establishments with paid employees have an address in this ZIP code.
Grocery stores and supermarkets11
Convenience stores6
Pharmacies and drug stores4
Retail bakeries0
Full-service restaurants37
Limited-service restaurants36
Coffee shops and snack bars6
Bars0
Physicians’ offices57
Dentists’ offices25
Child care centers8
Gyms and fitness centers6
Movie theaters0
Museums0
Counts are business establishments with paid employees, by the ZIP code of their address. Self-employed people without staff, and public facilities such as libraries, are not included.
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023
Health.
Estimated share of adults in 21157, next to the national figure.
76%
had a routine checkup in the past year
HereUnited States
64%
visited a dentist in the past year
HereUnited States
7%
of 18–64s have no health insurance
HereUnited States
25%
get no leisure-time physical activity
HereUnited States
35%
usually sleep less than 7 hours
HereUnited States
12%
smoke
HereUnited States
38%
have obesity
HereUnited States
11%
have diagnosed diabetes
HereUnited States
35%
have high blood pressure
HereUnited States
16%
report fair or poor general health
HereUnited States
16%
report frequent mental distress
HereUnited States
32%
often feel lonely
HereUnited States
10%
faced food insecurity in the past year
HereUnited States
9%
faced housing insecurity in the past year
HereUnited States
6%
lacked reliable transportation in the past year
HereUnited States
These are model-based estimates for adults from the CDC’s PLACES project, combining national health surveys with local population data. They are not counts of local patients, and small differences between nearby ZIP codes are within the margin of the model.
Source: Centers for Disease Control and Prevention, PLACES 2025 release (ZCTA), public domain
Nearest public schools.
In a straight line from the center of the ZIP code. Attendance zones are set by each school district.
Westminster HighWestminster0.7 mi
Carroll County Career & Technology CenterWestminster0.8 mi
Post Secondary ProgramWestminster0.9 mi
Carroll Springs SchoolWestminster0.9 mi
Crossroads Middle SchoolWestminster1.0 mi
Source: National Center for Education Statistics, EDGE public school locations 2024–25
Nearby ZIP codes.
ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas, which closely match the postal ZIP codes used for addresses.
21157