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ZIP Code Database - Facts & Stats

Data Last Updated: November 1, 2022

ZIP Codes for City of Great Mills, MD

Great Mills, MD Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 20634StandardSaint Marys5,927

Timezone(s):Eastern (GMT -05:00)
Population:5,927 (More Details)
Male Population:2,895
Female Population:3,032
Median Age:33
ZIP Codes:1
Area Codes:2
Total Area:764 square miles (county)
Land Area:357 square miles (county)
Water Area:407 square miles (county)

Great Mills, MD Demographic Information *

There is no Census data for the city of GREAT MILLS, MD. We have pulled information for the ZIP Code 20634 instead.
Total population5,927
Male population2,895
Female population3,032
Median age (years)33.4
White Population3,907
Black Population1,364
Indian Population17
Asian Population279
Hawaiian Population5
Hispanic Population364
Median age (Male)33.2
Median age (Female)33.7
Total households2,215
Family households (families)1,546
Average household size2.67
Average family size3.18
Total housing units2,375
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 11/1/2022],
  2. Internal Data Creation [Last Updated: 11/1/2022],
  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],