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ZIP Code Database - Facts & Stats

Data Last Updated: August 1, 2022

ZIP Codes for City of Knoxville, MD

Knoxville, MD Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 21716StandardFrederick4,885240 / 301
ZIP Code 21758StandardFrederick4,921240 / 301

Timezone(s):Eastern (GMT -05:00)
Population:4,921 (More Details)
Male Population:2,449
Female Population:2,472
Median Age:41
ZIP Codes:2
Area Codes:2
Total Area:667 square miles (county)
Land Area:660 square miles (county)
Water Area:7 square miles (county)

Knoxville, MD Demographic Information *

There is no Census data for the city of KNOXVILLE, MD. We have pulled information for the ZIP Code 21758 instead.
Total population4,921
Male population2,449
Female population2,472
Median age (years)40.8
White Population4,400
Black Population287
Indian Population11
Asian Population70
Hawaiian Population1
Hispanic Population127
Median age (Male)40.1
Median age (Female)41.4
Total households1,749
Family households (families)1,339
Average household size2.81
Average family size3.18
Total housing units1,882
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 8/1/2022],
  2. Internal Data Creation [Last Updated: 8/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],