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Zip Code 20646 — La Plata, MD

20646 is a ZIP Code associated with La Plata, MD, located within Charles. The postal region supports an estimated population of 21,400 residents across Data Pending housing units, with a population density of 103.6 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.521140, -76.999890)

Data Metric	Local Statistic
Postal / Zip Code	20646
Primary City	La Plata
State / Province	MD
County	Charles
Total Population	21,400
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	103.6 people/sq mi
Timezone	America/New_York

How 20646 Compares

Metric	ZIP 20646	Charles County	MD State Average
Population	21,400	170,349	6,205,597
Median Income	Data Pending	N/A	N/A
Population Density	103.6 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 20677	Port Tobacco	2.6 mi	2,088	N/A
Zip 20611	Bel Alton	4.1 mi	1,219	N/A
Zip 20675	Pomfret	4.4 mi	1,796	N/A
Zip 20695	White Plains	4.9 mi	16,407	N/A
Zip 20693	Welcome	6.5 mi	1,496	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →