Mercer   County NJ United States

County FIPS 34021
Largest City Trenton
State New Jersey
Latitude 40.2834
Longitude -74.7018
Population 385,864
Density 1719.38 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: $100,645
Median individual: $47,469

Race

Mode: 46.2% White

Gender

 50.6% female 

Rent

  $1623 / month  

Median house value: $377,504.0

Age

Median: 39.5 years old

Education

With at least college degree: 45.5%
With STEM degree: 50.4%

Marital Status

 46.5% married 

Never married: 37.7%

Labor Force Participation

 65.3% working 

Unemployed: 6.3%

Average Family Size

 3.17 people 

Commute Time

 27.1 minutes 

Health Care

 7.9% uninsured 

Poverty

 10.3%

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

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