Rohrersville, MD 21779 ZIP Code Profile

Related Place Profiles:
Gapland, MD | Rohrersville, MD

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ZIP Code 21779: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Rohrersville, MD 21779

Acceptable Alternative
Gapland, MD 21779

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 21
  • Single Family Addresses: 356
  • Multi-Family Addresses: 0
  • County: Washington County
  • Centroid: Latitude 39.438, Longitude -77.659
  • 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.


21779 ZIP Code Map

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Rohrersville, MD 21779 Data & Demographics (As of July 1, 2017)


Total Population 888
Daytime Population: Workers 78
Daytime Population: Residents 387
Total Daytime Population (TDP) 465
Ratio TDP/Total Population1 0.52
Population in Households 886
Population in Familes 763
Population in Group Qrtrs 2
Population Density2 119
Diversity Index3 9


Median Household Income $71,442
Average Household Income $92,473
Per Capita Income $35,908


Total Housing Units 364 (100%)
Owner Occupied HU 299 (82.1%)
Renter Occupied HU 45 (12.4%)
Vacant Housing Units 20 ( 5.5%)
Median Home Value $321,014
Average Home Value $348,328


Total Households 344
Average Household Size 2.58
Family Households 261
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 0.39% 0.36%
Households 0.37% 0.4%
Families 0.21% 0.38%
Median Household Income   2.11%
Per Capita Income   3.08%

Rohrersville, MD 21779 - Peer Comparisons by Rank and Percentile

The table below compares 21779 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 # 363 21st
Population Density # 340 26th
Diversity Index # 432 6th
Median Household Income # 252 45th
Per Capita Income # 228 50th

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

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