Westminster, MD 21157 ZIP Code Profile

Related Place Profiles:
Carrollton, MD | Westminster, MD

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ZIP Code 21157: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Westminster, MD 21157

Not Acceptable, USPS
Carrollton, MD 21157

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 1,431
  • Single Family Addresses: 13,256
  • Multi-Family Addresses: 1,220
  • County: Carroll County
  • Centroid: Latitude 39.555, Longitude -76.991
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


21157 ZIP Code Map

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Westminster, MD 21157 Data & Demographics (As of July 1, 2016)


Total Population 37,850
Population in Households 36,121
Population in Familes 29,697
Population in Group Qrtrs 1,729
Population Density1 469
Diversity Index2 26


Total Households 14,027
Average Household Size 2.58
Family Households 9,558
Average Family Size 3


Total Housing Units 14,761 (100%)
Owner Occupied HU 9,963 (67.5%)
Renter Occupied HU 4,064 (27.5%)
Vacant Housing Units 734 ( 5.0%)
Median Home Value $320,844
Average Home Value $369,093


Median Household Income $77,124
Average Household Income $90,724
Per Capita Income $34,680
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.3% 0.34%
Households 0.3% 0.37%
Families 0.16% 0.27%
Median Household Income   2.03%
Per Capita Income   1.57%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Westminster, MD 21157 - Peer Comparisons by Rank and Percentile

The table below compares 21157 to the other 455 ZIP Codes in Maryland by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 47 90th
Population Density1 # 209 54th
Diversity Index2 # 322 30th
Median Household Income # 214 53rd
Per Capita Income # 235 49th

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.