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Zip Code 20686 — Saint Marys City, MD

20686 is a ZIP Code associated with Saint Marys City, MD, located within St. Mary's. The postal region supports an estimated population of 971 residents across Data Pending housing units, with a population density of 1,383.2 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.185570, -76.438980)

Data Metric	Local Statistic
Postal / Zip Code	20686
Primary City	Saint Marys City
State / Province	MD
County	St. Mary's
Total Population	971
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	1,383.2 people/sq mi
Timezone	America/New_York

How 20686 Compares

Metric	ZIP 20686	St. Mary's County	MD State Average
Population	971	113,480	6,205,597
Median Income	Data Pending	N/A	N/A
Population Density	1,383.2 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 20630	Drayden	2.2 mi	559	N/A
Zip 20667	Park Hall	2.3 mi	150	N/A
Zip 20653	Lexington Park	3.0 mi	26,852	N/A
Zip 20684	Saint Inigoes	3.3 mi	802	N/A
Zip 20692	Valley Lee	3.7 mi	505	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 →