Mercer County, NJ — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
383,286
Male
189,507
49.4%
Female
193,779
50.6%
Median Age
39.2 yrs
Avg Household Size
2.6
Foreign Born
25.7%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher30.4%
High School or Higher47.0%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
2.8%
Disability
0.0%
Non-English Home
6.8%
Married
39.8%
Mercer County, NJ has a population of 383,286 according to 2023 Census Bureau estimates. The median age is 39.2 years. The largest racial or ethnic group is White at 49.8% of the population. 30.4% of residents hold a bachelor's degree or higher. 25.7% of residents are foreign-born.