20634   Zip Code Great Mills St. Mary's MD United States

City Great Mills
County St. Mary's
State Maryland
Latitude 38.24582
Longitude -76.49412
Population 7,088
Density 1013.99 people per square mile
Time Zone America/New York
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $139,375
Median individual: $71,650

Race

Mode: 56.0% White

Gender

 50.7% female 

Rent

  $1814 / month  

Median house value: $343,864.0

Age

Median: 32.0 years old

Education

With at least college degree: 40.2%
With STEM degree: 52.0%

Marital Status

 46.3% married 

Never married: 38.6%

Labor Force Participation

 81.8% working 

Unemployed: 1.3%

Average Family Size

 3.29 people 

Commute Time

 23.6 minutes 

Health Care

 1.0% uninsured 

Poverty

 4.7%

All data comes from the SimpleMaps US Zips Comprehensive Database, February 2026.

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