Warwick, MD 21912 ZIP Code Profile

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Warwick, MD

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ZIP Code 21912: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Warwick, MD 21912

  • ZIP Code Type: STANDARD
  • County: Cecil County
  • Centroid: Latitude 39.43, Longitude -75.804
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 15
  • PO Box Addresses: 57
  • Residential Addresses: 413
    • Multi-Family Addresses: 0
    • Single Family Addresses: 413

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

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21912 ZIP Code Map

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Warwick, MD 21912 Data & Demographics (As of July 1, 2017)


Total Population 1,216
Daytime Population: Workers 354
Daytime Population: Residents 517
Total Daytime Population (TDP) 871
Ratio TDP/Total Population1 0.72
Population in Households 1,216
Population in Familes 993
Population in Group Qrtrs 0
Population Density2 40
Diversity Index3 44


Median Household Income $59,906
Average Household Income $77,145
Per Capita Income $28,612


Total Housing Units 503 (100%)
Owner Occupied HU 314 (62.4%)
Renter Occupied HU 137 (27.2%)
Vacant Housing Units 52 (10.3%)
Median Home Value $248,750
Average Home Value $352,787


Total Households 451
Average Household Size 2.7
Family Households 322
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood 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.


2010-2017 2017-2022
Population 1.19% 0.94%
Households 1.05% 0.83%
Families 0.93% 0.73%
Median Household Income   1.76%
Per Capita Income   2.8%

Warwick, MD 21912 - Peer Comparisons by Rank and Percentile

The table below compares 21912 to the other 456 ZIP Codes in Maryland by rank and percentile using July 1, 2017 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 # 340 26th
Population Density # 418 9th
Diversity Index # 187 59th
Median Household Income # 323 29th
Per Capita Income # 333 27th

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

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