Deal Island, MD 21821 ZIP Code Profile

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

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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
  • Businesses Addresses: 20
  • Single Family Addresses: 488
  • Multi-Family Addresses: 0
  • County: Somerset County
  • Centroid: Latitude 38.167, Longitude -75.906
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

Neighborhood Data

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21821 ZIP Code Map

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Deal Island, MD 21821 Data & Demographics (As of July 1, 2016)


Total Population 945
Population in Households 945
Population in Familes 755
Population in Group Qrtrs 0
Population Density1 50
Diversity Index2 26


Total Households 420
Average Household Size 2.25
Family Households 278
Average Family Size 3


Total Housing Units 734 (100%)
Owner Occupied HU 350 (47.7%)
Renter Occupied HU 70 ( 9.5%)
Vacant Housing Units 314 (42.8%)
Median Home Value $113,830
Average Home Value $162,786


Median Household Income $36,517
Average Household Income $43,944
Per Capita Income $19,530
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.76% -0.64%
Households -0.49% -0.48%
Families -0.62% -0.58%
Median Household Income   -0.61%
Per Capita Income   0.52%
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.

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

The table below compares 21821 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 # 361 21st
Population Density1 # 411 10th
Diversity Index2 # 315 31st
Median Household Income # 438 4th
Per Capita Income # 437 4th

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

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