St. Tammany   County LA United States

County FIPS 22103
Largest City Mandeville
State Louisiana
Latitude 30.4103
Longitude -89.9584
Population 272,421
Density 322.38 people per square mile
Time Zone America/Chicago
  • 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: $81,202
Median individual: $41,605

Race

Mode: 73.8% White

Gender

 51.1% female 

Rent

  $1332 / month  

Median house value: $284,023.0

Age

Median: 40.5 years old

Education

With at least college degree: 37.7%
With STEM degree: 43.4%

Marital Status

 52.4% married 

Never married: 28.5%

Labor Force Participation

 62.9% working 

Unemployed: 4.8%

Average Family Size

 3.08 people 

Commute Time

 31.5 minutes 

Health Care

 6.8% uninsured 

Poverty

 11.4%

All data comes from the SimpleMaps US Counties Database, 2026.

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