Point of Rocks, MD 21777 ZIP Code Profile

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Point of Rocks, MD

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ZIP Code 21777: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Point of Rocks, MD 21777

Acceptable Alternative
Pt of Rocks, MD 21777

  • ZIP Code Type: STANDARD
  • County: Frederick County
  • Centroid: Latitude 39.28, Longitude -77.533
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 40
  • PO Box Addresses: 62
  • Residential Addresses: 619
    • Multi-Family Addresses: 0
    • Single Family Addresses: 619

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

EXTREMELY LOCAL Demographic Data

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21777 ZIP Code Map

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Point of Rocks, MD 21777 Data & Demographics (As of July 1, 2017)


Total Population 1,627
Daytime Population: Workers 254
Daytime Population: Residents 781
Total Daytime Population (TDP) 1,035
Ratio TDP/Total Population1 0.64
Population in Households 1,627
Population in Familes 1,465
Population in Group Qrtrs 0
Population Density2 1,350
Diversity Index3 39


Median Household Income $105,788
Average Household Income $116,673
Per Capita Income $38,724


Total Housing Units 561 (100%)
Owner Occupied HU 485 (86.5%)
Renter Occupied HU 55 ( 9.8%)
Vacant Housing Units 21 ( 3.7%)
Median Home Value $320,283
Average Home Value $365,773


Total Households 540
Average Household Size 3.01
Family Households 437
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 1.88% 2.11%
Households 1.73% 2.13%
Families 1.73% 2.06%
Median Household Income   1.24%
Per Capita Income   2.8%

Point of Rocks, MD 21777 - Peer Comparisons by Rank and Percentile

The table below compares 21777 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 # 324 29th
Population Density # 139 70th
Diversity Index # 223 51st
Median Household Income # 95 79th
Per Capita Income # 191 58th

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

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