Elk Mills, MD 21920 ZIP Code Profile

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Elk Mills, MD

ZIP Code 21920: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Elk Mills, MD 21920

  • ZIP Code Type: PO BOX
  • County: Cecil County
  • Centroid: Latitude 39.657, Longitude -75.827
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 23
  • PO Box Addresses: 146
  • Residential Addresses: 1
    • Multi-Family Addresses: 0
    • Single Family Addresses: 1

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.


21920 ZIP Code Map

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Elk Mills, MD 21920 Data & Demographics (As of July 1, 2017)


Total Population 263
Daytime Population: Workers 111
Daytime Population: Residents 132
Total Daytime Population (TDP) 243
Ratio TDP/Total Population1 0.92
Population in Households 262
Population in Familes 224
Population in Group Qrtrs 1
Population Density2 219
Diversity Index3 21


Median Household Income $74,157
Average Household Income $88,540
Per Capita Income $30,096


Total Housing Units 96 (100%)
Owner Occupied HU 67 (69.8%)
Renter Occupied HU 22 (22.9%)
Vacant Housing Units 7 ( 7.3%)
Median Home Value $279,688
Average Home Value $317,537


Total Households 89
Average Household Size 2.94
Family Households 67
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 0.59% 0.45%
Households 0.47% 0.45%
Families 0.42% 0.3%
Median Household Income   1.4%
Per Capita Income   2.62%

Elk Mills, MD 21920 - Peer Comparisons by Rank and Percentile

The table below compares 21920 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 # 418 9th
Population Density # 289 37th
Diversity Index # 366 20th
Median Household Income # 244 47th
Per Capita Income # 308 33rd

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

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