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Zip Code 21788 — Thurmont, MD

21788 is a ZIP Code associated with Thurmont, MD, located within Frederick. The postal region supports an estimated population of 11,654 residents across Data Pending housing units, with a population density of 68.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.594290, -77.419580)

Data MetricLocal Statistic
Postal / Zip Code21788
Primary CityThurmont
State / ProvinceMD
CountyFrederick
Total Population11,654
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density68.8 people/sq mi
TimezoneAmerica/New_York

How 21788 Compares

MetricZIP 21788Frederick CountyMD State Average
Population11,654300,1006,205,597
Median IncomeData PendingN/AN/A
Population Density68.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 21778Rocky Ridge4.6 mi745N/A
Zip 21780Sabillasville6.2 mi2,159N/A
Zip 21798Woodsboro7.4 mi2,928N/A
Zip 21727Emmitsburg8.0 mi6,052N/A
Zip 21773Myersville8.1 mi5,826N/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 →