ZIP code · Westminster · Maryland · United States
ZIP code 21158 — Westminster
ZIP code 21158 serves Westminster, Maryland.
- Postal code
- 21158Single source Value from one source, not cross-checked.
- City
- Westminster
- County
- Carroll FIPS 24013
- State
- Maryland
- Country
- United States
- Coordinates
- 39.6070, -77.0294 — precision precise (locality)
View on OpenStreetMap - Population
- 22,404 (ZCTA, ACS 5-year)
- Population density
- 306 / sq mi
- Land area
- 73.3 sq mi (189.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $108,795
- Per-capita income
- $51,165
- Median age
- 42.6
- Households
- 8,370
- Housing units
- 8,818
- Median home value
- $375,100
- Median gross rent
- $1,735 / month
- Congressional district
- MD-2 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 21158 with another ZIP · ZIPs within 25 miles · distance from 21158
Map of ZIP code 21158
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 21°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 42 | 50 | 63 | 72 | 81 | 85 | 84 | 77 | 66 | 54 | 44 |
| Avg low °F | 21 | 23 | 30 | 40 | 50 | 60 | 64 | 62 | 54 | 43 | 33 | 26 |
| Precip in | 3.0 | 2.6 | 3.7 | 3.7 | 3.9 | 3.7 | 4.3 | 3.9 | 4.8 | 3.9 | 3.1 | 3.5 |
NOAA 1991–2020 climate normals from the nearest station: HANOVER 4 SW (11.3 mi) · NOAA NCEI
Places in ZIP 21158
- 7 schools
- 1 pharmacies
- 1 supermarkets
- 4 restaurants & cafés
- 12 parks
- 11 playgrounds
- 2 gyms & sports centres
- 18 places of worship
- 1 banks
- 3 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page