Chaptico, MD 20621 ZIP Code Profile

Related Place Profiles:
Chaptico, MD | Maddox, MD

ZIP Code 20621: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Chaptico, MD 20621

Acceptable Alternative
Maddox, MD 20621

  • ZIP Code Type: STANDARD
  • County: Saint Marys County
  • Centroid: Latitude 38.335, Longitude -76.82
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 17
  • PO Box Addresses: 368
  • Residential Addresses: 305
    • Multi-Family Addresses: 0
    • Single Family Addresses: 305

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

EXTREMELY LOCAL Demographic 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 demographic data.


20621 ZIP Code Map

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Chaptico, MD 20621 Data & Demographics (As of July 1, 2017)


Total Population 1,002
Daytime Population: Workers 106
Daytime Population: Residents 507
Total Daytime Population (TDP) 613
Ratio TDP/Total Population1 0.61
Population in Households 1,002
Population in Familes 852
Population in Group Qrtrs 0
Population Density2 76
Diversity Index3 28


Median Household Income $83,675
Average Household Income $95,448
Per Capita Income $35,531


Total Housing Units 528 (100%)
Owner Occupied HU 326 (61.7%)
Renter Occupied HU 47 ( 8.9%)
Vacant Housing Units 155 (29.4%)
Median Home Value $306,849
Average Home Value $390,721


Total Households 373
Average Household Size 2.69
Family Households 279
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 0.49% 0.65%
Households 0.38% 0.48%
Families 0.25% 0.43%
Median Household Income   1.1%
Per Capita Income   2.46%

Chaptico, MD 20621 - Peer Comparisons by Rank and Percentile

The table below compares 20621 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 # 354 23rd
Population Density # 380 17th
Diversity Index # 314 32nd
Median Household Income # 189 59th
Per Capita Income # 232 49th

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

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