Union County, New Jersey
Located in New Jersey, Union County has a population of 579,290 residents and a median age of 39.1 years, making it the #120 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 9.2%. The median home value is $529,200, and the median household income is $103,202, which is 37% above the national median.
Demographics
Union County has a population of 579,290, making it the #120 most populous county in the US. The median age is 39.1 years, which is 0.5% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Union County is $103,202, ranking #142 out of 3,222 counties — 37.3% above the national median. The poverty rate is 9.2% and unemployment stands at 6.5%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Union County is $529,200 (+87.7% vs national). Renters pay a median of $1,730/mo and the homeownership rate is 57.4%.
Median Home Value Trend
Rankings →Household Type
Education
In Union County, 38.9% of adults age 25+ hold a bachelor's degree or higher, which is 15.3% above the national average, ranking #318 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Union County is 79.3 years. 15.7% of adults report poor or fair health and 12.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
11.5% of adults in Union County smoke , 28.0% are obese , and 17.4% report excessive drinking. The drug overdose death rate is 29.6 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Union County is 3.4 per 100,000 and the suicide rate is 7.0 per 100,000. Motor vehicle deaths occur at a rate of 6.1 per 100,000.
Homicide Rate Trend
Families & Children
11.2% of children in Union County live in poverty and the infant mortality rate is 3.8 per 1,000 live births. The teen birth rate is 11.2 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Union County is 71.4%. The mean commute time is 33.5 min, which is 21.5% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Union County voted Democratic with a margin of 24.2%. The vote was 61.2% Dem / 37% Rep. Compared to 2020, the margin shifted 11.3 toward Republicans .
Vote Share Over Time
About Union County, New Jersey
Union County, New Jersey has a total population of 579,290, making it the 120th most populous county in the United States. The median age in Union County is 39.1 years, which is 0.5% above the national median of 38.9 years.
The median household income in Union County is $103,202, which ranks #142 of 3,222 counties nationwide. This is 37.3% above the national median of $75,149. The poverty rate is 9.2%, lower than the national rate of 12.6%. The unemployment rate stands at 6.5%.
The median home value in Union County is $529,200, 87.7% above the national median. Renters in Union County pay a median gross rent of $1,730 per month. The homeownership rate is 57.4%, compared to the national rate of 64.4%.
In Union County, 38.9% of residents aged 25 and older hold a bachelor's degree or higher, 15.3% above the national average of 33.7%. Health insurance coverage stands at 87.0% of the population. The average commute time for workers is 33.5 min.
Union County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 35.4% of the population, followed by Hispanic or Latino (35.2%) and Black (non-Hispanic) (19.1%).
All data for Union County, New Jersey comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.