Cooksville, MD 21723 ZIP Code Profile

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Cooksville, MD

ZIP Code 21723: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Cooksville, MD 21723

  • ZIP Code Type: STANDARD
  • County: Howard County
  • Centroid: Latitude 39.32, Longitude -77.009
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 7
  • PO Box Addresses: 0
  • Residential Addresses: 301
    • Multi-Family Addresses: 0
    • Single Family Addresses: 301

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.


21723 ZIP Code Map

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Cooksville, MD 21723 Data & Demographics (As of July 1, 2017)


Total Population 728
Daytime Population: Workers 131
Daytime Population: Residents 349
Total Daytime Population (TDP) 480
Ratio TDP/Total Population1 0.66
Population in Households 727
Population in Familes 685
Population in Group Qrtrs 1
Population Density2 198
Diversity Index3 39


Median Household Income $161,696
Average Household Income $217,285
Per Capita Income $65,411


Total Housing Units 223 (100%)
Owner Occupied HU 208 (93.3%)
Renter Occupied HU 11 ( 4.9%)
Vacant Housing Units 4 ( 1.8%)
Median Home Value $818,396
Average Home Value $758,774


Total Households 219
Average Household Size 3.32
Family Households 193
Average Family Size 4
  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 1.19% 1.34%
Households 1.05% 1.25%
Families 0.97% 1.21%
Median Household Income   0.56%
Per Capita Income   1.45%

Cooksville, MD 21723 - Peer Comparisons by Rank and Percentile

The table below compares 21723 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 # 371 19th
Population Density # 296 35th
Diversity Index # 230 50th
Median Household Income # 17 96th
Per Capita Income # 26 95th

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

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