La Plata, MD 20646 ZIP Code Profile

Related Place Profiles:
Dentsville, MD | La Plata, MD

ZIP Code 20646: Basic Data & USPS Preferred City Name

Preferred Name, USPS
La Plata, MD 20646

Acceptable Alternative
Dentsville, MD 20646

Not Acceptable, USPS
Laplata, MD 20646

  • ZIP Code Type: STANDARD
  • County: Charles County
  • Centroid: Latitude 38.525, Longitude -76.974
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 871
  • PO Box Addresses: 826
  • Residential Addresses: 7,117
    • Multi-Family Addresses: 294
    • Single Family Addresses: 6,823

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.


20646 ZIP Code Map

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La Plata, MD 20646 Data & Demographics (As of July 1, 2017)


Total Population 21,524
Daytime Population: Workers 11,127
Daytime Population: Residents 10,515
Total Daytime Population (TDP) 21,642
Ratio TDP/Total Population1 1.01
Population in Households 20,794
Population in Familes 17,862
Population in Group Qrtrs 730
Population Density2 264
Diversity Index3 55


Median Household Income $96,023
Average Household Income $115,512
Per Capita Income $41,735


Total Housing Units 8,035 (100%)
Owner Occupied HU 6,036 (75.1%)
Renter Occupied HU 1,510 (18.8%)
Vacant Housing Units 489 ( 6.1%)
Median Home Value $372,766
Average Home Value $407,745


Total Households 7,546
Average Household Size 2.76
Family Households 5,615
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 1.02% 1.28%
Households 1.06% 1.35%
Families 0.92% 1.23%
Median Household Income   1.33%
Per Capita Income   2.1%

La Plata, MD 20646 - Peer Comparisons by Rank and Percentile

The table below compares 20646 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 # 118 74th
Population Density # 271 41st
Diversity Index # 124 73rd
Median Household Income # 142 69th
Per Capita Income # 157 66th

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

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