Zip Code 21158
Westminster, Maryland — Carroll County
📍 ZIP code 21158 is in Westminster, Carroll County, Maryland.
ZIP code 21158 is located in Westminster, Carroll County, Maryland. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 22,404. The area code for ZIP code 21158 is 410.
Quick Answer
Zip code 21158 is in Westminster, Maryland (Carroll County). It has a population of 22,404, median household income of $108,795, and median home value of $375,100.
Population
22,404
Income
$108,795
Home Value
$375,100
Climate
85°F / 21°F
About Zip Code 21158
Zip code 21158 is located in Westminster, Maryland, within Carroll County. Home to approximately 22,404 residents, this area sits at an elevation of 572 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 410.
The median household income is $108,795 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $375,100, and the cost of living index is 135 (35% above the national average of 100).
Summers average a high of 85°F while winters drop to 21°F. The area receives about 44 in of rain and 28 in of snow annually. The zip code covers 74.4 square miles of land area and 0.2 square miles of water.
Key Statistics
22,404
$108,795
$375,100
Eastern (EST/EDT)
410
572 ft
74.4 sq mi
42.6
8,818
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Compare With Nearby Zip Codes
| Metric | 21158 | 21787 | 21157 | 17340 | 17331 | 21776 |
|---|---|---|---|---|---|---|
| City | Westminster, MD | Taneytown, MD | Westminster, MD | Littlestown, PA | Hanover, PA | New Windsor, MD |
| Population | 22,404 | 11,549 | 40,191 | 11,403 | 55,374 | 5,905 |
| Median Income | $108,795 | $88,212 | $102,835 | $84,858 | $76,661 | $111,923 |
| Home Value | $375,100 | $344,800 | $394,100 | $276,700 | $228,700 | $433,600 |
| Cost of Living | 135 | 113 | 132 | 100 | 86 | 146 |
| Median Age | 42.6 | 39.5 | 41.8 | 40.8 | 41.8 | 43.9 |
Cost of Living
100 = National Average. Westminster's cost of living is 35% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.4x
Demographics
Zip code 21158 has a population of 22,404 people with a median age of 42.6. There are 8,818 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Westminster (21158) population trend from 2010 to 2024
↓ -33.2%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
85°F
21°F
44 in
28 in
Westminster experiences warm summers with average highs around 85°F. Winters are cool with lows averaging 21°F. The area receives about 28 in of snow per year.
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Housing & Economy
Median Home Value
$375,100
Median Household Income
$108,795
With 8,818 housing units across 74.4 square miles, 21158 has a housing density of 119 units per square mile. The home price-to-income ratio is 3.4x.
Location & Geography
Latitude
39.6537°
Longitude
-77.0351°
Land Area
74.4 sq mi
Water Area
0.2 sq mi
Nearby Zip Codes
Zip codes closest to 21158 (Westminster, MD) with distances:
All Zip Codes in Westminster, MD
Other zip codes serving Westminster:
Related Cities in Maryland
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 21158's $108,795. A way to compare Westminster to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 21158 (Westminster, MD). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Westminster, Maryland?
Westminster, Maryland uses zip code 21158 along with 1 other zip codes.
What county is zip code 21158 in?
Zip code 21158 is located in Carroll County, Maryland.
What is the population of zip code 21158?
The population of zip code 21158 is 22,404 with a median age of 42.6.
Is 21158 in Westminster, Maryland?
Yes, zip code 21158 is in Westminster, Carroll County, Maryland. The area code is 410.
Frequently Asked Questions
What city is zip code 21158 in?
Zip code 21158 is in Westminster, Maryland. It is part of Carroll County and uses the Eastern (EST/EDT) timezone.
What is zip code 21158?
Zip code 21158 is a U.S. postal code in Westminster, Maryland (Carroll County). It has a population of 22,404 and covers 74.4 square miles.
What is the population of zip code 21158?
The population of zip code 21158 (Westminster, MD) is 22,404 with a median age of 42.6. There are approximately 8,818 housing units in this area.
What is the median income in zip code 21158?
The median household income in zip code 21158 (Westminster, MD) is $108,795 per year. The cost of living index is 135 (100 = national average).
What is the average home price in zip code 21158?
The median home value in zip code 21158 (Westminster, MD) is $375,100. The cost of living index is 135 compared to the national average of 100.
What county is zip code 21158 in?
Zip code 21158 is located in Carroll County, Maryland. The primary city is Westminster.
What is the area code for zip code 21158?
Zip code 21158 in Westminster, MD uses area code 410. It is located in the Eastern (EST/EDT) timezone.
Is zip code 21158 a good place to live?
Zip code 21158 (Westminster, MD) has a cost of living index of 135 (100 = national average), a median household income of $108,795, and median home values of $375,100. The median age is 42.6. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 21158?
The cost of living index for zip code 21158 (Westminster, MD) is 135, where 100 represents the national average. This area is above the national average. Median home value: $375,100.
What schools serve zip code 21158?
Zip code 21158 in Westminster, Maryland is served by the local school district of Carroll County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.