Zip code 21157: Westminster, Maryland

Q: What city is zip code 21157?

21157 is assigned to Westminster, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 21157 in?

21157 is in Carroll County, Maryland.

Q: What is the population of 21157?

About 38,984 people live in 21157, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 21157?

The median household income in 21157 is $104,966.

Q: What zip codes are near 21157?

The closest zip codes to 21157 are 21048, 21776, 21158, 21074, 21155.

Residential delivery areaCarroll CountyEastern Time

Population

38,984

Median household income

$105K

U.S. $81K

Median home value

$424K

U.S. $333K

Median rent

$1,331/mo

U.S. $1,413

Median age

43.2

U.S. 38.9

Land area

78 sq mi

502 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 21157

21157 is a suburban zip code in Westminster, Maryland (Carroll County), covering 78 sq mi of land. About 38,984 people live here, or 502 per square mile. The median resident is 43.2 years old, compared with 38.9 nationally.

The median household earns $104,966 a year, 30% above the national median of $80,734. 6.7% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $424,100, or 4.0 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 77% of occupied homes are lived in by their owners, and renters pay a median of $1,331 a month.

38% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 31 minutes each way, and 18% of workers work from home. The most common jobs among working residents are in management; office and administrative support; and construction and repair.

How 21157 compares

Sorted from highest to lowest national percentile

Government workers20.4%
85th
U.S. 14.5% · MD 22.5%247th of 444 in MD
Average commute31 min
79th
U.S. 26.4 min · MD 31.1 min219th of 421 in MD
Median age43.2
78th
U.S. 38.9 · MD 39.4182nd of 446 in MD
Tech workers4.9%
78th
U.S. 3.8% · MD 6.4%215th of 444 in MD
Median household income$104,966
75th
U.S. $80,734 · MD $103,678211th of 414 in MD
Per capita income$49,793
72nd
U.S. $44,673 · MD $52,979241st of 446 in MD
Veterans7.5%
72nd
U.S. 6.2% · MD 6.8%196th of 446 in MD
Homeownership rate76.8%
71st
U.S. 65.2% · MD 67.6%263rd of 441 in MD
Work from home17.9%
71st
U.S. 15.1% · MD 19.3%200th of 444 in MD
Residents 65 and older19.5%
71st
U.S. 17.2% · MD 16.7%172nd of 446 in MD
Median earnings per worker$57,517
71st
U.S. $49,666 · MD $61,200252nd of 443 in MD
Population38,984
66th
U.S. 334,922,499 · MD 6,206,01147th of 446 in MD
Median home value$424,100
65th
U.S. $332,700 · MD $419,900211th of 421 in MD
Bachelor's degree or higher37.9%
62nd
U.S. 35.7% · MD 43.4%222nd of 445 in MD
Rent-burdened renters53.6%
61st
U.S. 51.1% · MD 51.5%157th of 404 in MD
Self-employed workers10.2%
61st
U.S. 10% · MD 8.7%168th of 444 in MD
Healthcare workers9.3%
47th
U.S. 9.7% · MD 9%169th of 444 in MD
Median gross rent$1,331
45th
U.S. $1,413 · MD $1,705242nd of 338 in MD
Income inequality (Gini)0.423
40th
U.S. 0.483 · MD 0.456155th of 438 in MD
Broadband access90.5%
37th
U.S. 91% · MD 92.4%282nd of 441 in MD
Unemployment rate4.1%
36th
U.S. 5.2% · MD 4.9%204th of 444 in MD
Population density502/sq mi
33rd
U.S. 95/sq mi · MD 639/sq mi212th of 446 in MD
Foreign-born residents5.9%
33rd
U.S. 14.1% · MD 16.6%236th of 446 in MD
Housing vacancy4.4%
27th
U.S. 10.1% · MD 7.7%267th of 441 in MD
Residents under 1819.2%
26th
U.S. 22% · MD 22.2%305th of 446 in MD
Poverty rate6.7%
23rd
U.S. 12.5% · MD 9.4%222nd of 441 in MD
Uninsured rate4%
22nd
U.S. 8.4% · MD 6.3%203rd of 444 in MD
Diversity index27.8
21st
U.S. 61.4 · MD 67.7316th of 446 in MD

Measure	21157	Carroll	MD	U.S.	National percentile	Rank in MD
Government workers	20.4%	19.7%	22.5%	14.5%	85th	247th of 444
Average commute	31 min	34.4 min	31.1 min	26.4 min	79th	219th of 421
Median age	43.2	41.3	39.4	38.9	78th	182nd of 446
Tech workers	4.9%	5.1%	6.4%	3.8%	78th	215th of 444
Median household income	$104,966	$118,211	$103,678	$80,734	75th	211th of 414
Per capita income	$49,793	$53,124	$52,979	$44,673	72nd	241st of 446
Veterans	7.5%	7.5%	6.8%	6.2%	72nd	196th of 446
Homeownership rate	76.8%	84.3%	67.6%	65.2%	71st	263rd of 441
Work from home	17.9%	17.3%	19.3%	15.1%	71st	200th of 444
Residents 65 and older	19.5%	17.9%	16.7%	17.2%	71st	172nd of 446
Median earnings per worker	$57,517	$65,314	$61,200	$49,666	71st	252nd of 443
Population	38,984	175,321	6,206,011	334,922,499	66th	47th of 446
Median home value	$424,100	$434,000	$419,900	$332,700	65th	211th of 421
Bachelor's degree or higher	37.9%	40.7%	43.4%	35.7%	62nd	222nd of 445
Rent-burdened renters	53.6%	49.1%	51.5%	51.1%	61st	157th of 404
Self-employed workers	10.2%	9.2%	8.7%	10%	61st	168th of 444
Healthcare workers	9.3%	8.7%	9%	9.7%	47th	169th of 444
Median gross rent	$1,331	$1,427	$1,705	$1,413	45th	242nd of 338
Income inequality (Gini)	0.423	0.403	0.456	0.483	40th	155th of 438
Broadband access	90.5%	92.5%	92.4%	91%	37th	282nd of 441
Unemployment rate	4.1%	3.5%	4.9%	5.2%	36th	204th of 444
Population density	502/sq mi	392/sq mi	639/sq mi	95/sq mi	33rd	212th of 446
Foreign-born residents	5.9%	5.5%	16.6%	14.1%	33rd	236th of 446
Housing vacancy	4.4%	3.7%	7.7%	10.1%	27th	267th of 441
Residents under 18	19.2%	22%	22.2%	22%	26th	305th of 446
Poverty rate	6.7%	5.2%	9.4%	12.5%	23rd	222nd of 441
Uninsured rate	4%	2.9%	6.3%	8.4%	22nd	203rd of 444
Diversity index	27.8	28.1	67.7	61.4	21st	316th of 446

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

15%

5–17

11%

18–24

10%

25–34

13%

35–44

14%

45–54

14%

55–64

11%

65–74

75+

Median age

43.2

Under 18

19.2%

65 and over

19.5%

Race and ethnicity

White85%
Black4%
Hispanic6%
Asian1%
Native American0.0%
Pacific Islander0%
Other0.8%
Multiracial3%

Diversity index

27.8

U.S. 61.4

Foreign-born

5.9%

U.S. 14.1%

Born in state

63.9%

Language spoken at home (households)

English only

92%

Spanish

Other Indo-European

Asian / Pacific

0.4%

Other

0.2%

Households

Households: 14,785
Average household size: 2.5
Family households: 70.3%
Married couples: 57%
Living alone: 25.3%
Veterans (of adults): 7.5%
Male / female: 48% / 52%

Income and poverty

Household income distribution

<$25k

$25–50k

14%

$50–75k

14%

$75–100k

10%

$100–150k

19%

$150–200k

14%

$200k+

19%

Median household income

21157

$104,966

Carroll Co.

$118,211

Maryland

$103,678

United States

$80,734

Per capita income

$49,793

U.S. $44,673

Poverty rate

6.7%

U.S. 12.5%

Households earning $150K+

33.1%

U.S. 23%

Income inequality (Gini)

0.423

U.S. 0.483

Housing

Median home value

21157

$424,100

Carroll Co.

$434,000

Maryland

$419,900

United States

$332,700

Median gross rent

21157

$1,331

Carroll Co.

$1,427

Maryland

$1,705

United States

$1,413

Types of housing

Single-family

82%

2–4 units

5–19 units

20+ units

Mobile home

0.1%

Boat, RV, van

Housing units: 15,471
Owner-occupied: 76.8%
Vacant: 4.4%
Median year built: 1978
Median rooms: 6.9
Renters paying 30%+ of income: 53.6%
Renters paying 50%+ of income: 21.1%
Home value to income: 4.0× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

71%

Carpooled

Transit

0.2%

Walked

Bicycle

0.4%

Worked from home

18%

Other

0.8%

Commute time (one way)

<10 min

16%

10–19

24%

20–29

13%

30–44

14%

45–59

16%

60+

17%

Average commute

31 min

U.S. 26.4 min

Unemployment

4.1%

U.S. 5.2%

In labor force

66%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

14%

Office and admin

10%

Construction and repair

10%

Healthcare

Sales

Education

Business and finance

Transportation and moving

Computer and math

Production

Cleaning and personal care

Food service

Engineering and science

Police and fire

Legal and social services

Arts, media and sports

Farming, fishing and forestry

0.2%

Industries

Health care and social assistance

14%

Education

13%

Retail

10%

Professional and technical services

10%

Construction

Public administration

Finance, insurance and real estate

Other services

Restaurants and hotels

Transportation, warehousing and utilities

Manufacturing

Admin, support and management

Information

Wholesale

Arts and recreation

Agriculture and mining

0.6%

Median earnings per worker

$57,517

U.S. $49,666

Self-employed

10.2%

U.S. 10%

Government workers

20.4%

U.S. 14.5%

Nonprofit workers

10.1%

U.S. 8.8%

Median earnings by type of work

Type of work	21157	U.S.
Management, business, science and arts	$82,612	$74,888
Service	$29,458	$26,804
Sales and office	$36,022	$40,476
Construction and maintenance	$54,900	$49,199
Production and transportation	$46,431	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

29%

Some college

19%

Associate's

Bachelor's

23%

Graduate

15%

High school graduate or higher: 93.8%
Bachelor's degree or higher: 37.9%
Graduate or professional degree: 14.6%
Households with broadband: 90.5%
Cable, fiber or DSL: 78.8%
No internet access: 7.7%
Without health insurance: 4%
Limited-English households: 0.5%

Geography

City (USPS): Westminster
State: Maryland
County: Carroll County
Center point: 39.5486° N, 76.9836° W
Land area: 78 sq mi
Water area: 0.2 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Westminster4% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 21157

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
21048	Finksburg, MD	4.6 mi	10,481	$131,921	$459,000
21776	New Windsor, MD	6.5 mi	6,261	$133,409	$461,600
21158	Westminster, MD	7.8 mi	22,083	$109,827	$384,700
21074	Hampstead, MD	9.2 mi	14,777	$108,536	$378,100
21155	Upperco, MD	9.6 mi	3,313	$123,158	$479,500
21020	Boring, MD · PO box	9.7 mi	—	—	—
21784	Sykesville, MD	10 mi	39,258	$139,395	$491,800
21071	Glyndon, MD	10 mi	404	$213,500	$450,500
21136	Reisterstown, MD	11 mi	32,088	$118,500	$422,100
21791	Union Bridge, MD	11 mi	5,340	$93,015	$379,800
21792	Unionville, MD · PO box	12 mi	—	—	—
21102	Manchester, MD	12 mi	12,162	$135,069	$392,800

Zip codes like 21157 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 21157

What city is zip code 21157?

21157 is assigned to Westminster, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 21157 in?

21157 is in Carroll County, Maryland.

What is the population of 21157?

About 38,984 people live in 21157, according to the Census Bureau's American Community Survey.

What time zone is 21157 in?

21157 is in Eastern Time.

What is the median household income in 21157?

The median household income in 21157 is $104,966.

What zip codes are near 21157?

The closest zip codes to 21157 are 21048, 21776, 21158, 21074, 21155.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 21157, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.