Madison, MD 21648 ZIP Code Profile

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Madison, MD

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ZIP Code 21648: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Madison, MD 21648

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 2
  • Single Family Addresses: 101
  • Multi-Family Addresses: 0
  • County: Dorchester County
  • Centroid: Latitude 38.502, Longitude -76.229
  • 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.


21648 ZIP Code Map

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Madison, MD 21648 Data & Demographics (As of July 1, 2017)


Total Population 129
Daytime Population: Workers 26
Daytime Population: Residents 50
Total Daytime Population (TDP) 76
Ratio TDP/Total Population1 0.59
Population in Households 127
Population in Familes 102
Population in Group Qrtrs 2
Population Density2 51
Diversity Index3 24


Median Household Income $63,507
Average Household Income $84,099
Per Capita Income $36,005


Total Housing Units 72 (100%)
Owner Occupied HU 46 (63.9%)
Renter Occupied HU 8 (11.1%)
Vacant Housing Units 18 (25.0%)
Median Home Value $283,333
Average Home Value $330,978


Total Households 54
Average Household Size 2.35
Family Households 37
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 0.33% 0.46%
Households 0.26% 0.37%
Families 0.0% 0.53%
Median Household Income   4.0%
Per Capita Income   3.37%

Madison, MD 21648 - Peer Comparisons by Rank and Percentile

The table below compares 21648 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 # 433 5th
Population Density # 410 10th
Diversity Index # 348 24th
Median Household Income # 296 35th
Per Capita Income # 226 51st

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

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