Deal Island, MD 21821 ZIP Code Profile

Related Place Profiles:
Chance, MD | Dames Quarter, MD | Deal Island, MD | Wenona, MD

ZIP Code 21821: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Deal Island, MD 21821

Acceptable Alternative
Chance, MD 21821
Dames Quarter, MD 21821
Wenona, MD 21821

  • ZIP Code Type: STANDARD
  • County: Somerset County
  • Centroid: Latitude 38.167, Longitude -75.906
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 20
  • PO Box Addresses: 84
  • Residential Addresses: 512
    • Multi-Family Addresses: 0
    • Single Family Addresses: 512

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2019, Maps updated: February 1, 2019.

Jump to... (On This Page!)
  1. 21821 2018 Demographic Data
  2. Growth Rates for 21821 (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Maryland Research Tools (Easy Tools & Current Data)
  3. Maryland Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Deal Island, MD 21821 Data & Demographics (As of July 1, 2018)


Total Population 966
Population in Households 966
Population in Familes 776
Population in Group Qrtrs 0
Population Density2 55
Diversity Index3 26


Median Household Income $37,092
Average Household Income $46,983
Per Capita Income $20,573


Total Housing Units 734 (100%)
Owner Occupied HU 352 (48.0%)
Renter Occupied HU 71 ( 9.7%)
Vacant Housing Units 311 (42.4%)
Median Home Value $136,905
Average Home Value $189,205


Total Households 423
Average Household Size 2.28
Family Households 280
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population -0.31% -0.04%
Households -0.28% 0.0%
Families -0.38% -0.14%
Median Household Income   2.5%
Per Capita Income   3.91%

Deal Island, MD 21821 - Peer Comparisons by Rank and Percentile

The table below compares 21821 to the other 448 ZIP Codes in Maryland by rank and percentile using July 1, 2018 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 # 358 21st
Population Density # 395 12th
Diversity Index # 331 26th
Median Household Income # 431 4th
Per Capita Income # 425 5th

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

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