Monmouth County, New Jersey
Located in New Jersey, Monmouth County has a population of 645,353 residents and a median age of 43.2 years, making it the #109 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 6.5%. The median home value is $606,100, and the median household income is $124,845, which is 66% above the national median.
Demographics
Monmouth County has a population of 645,353, making it the #109 most populous county in the US. The median age is 43.2 years, which is 11.1% 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 Monmouth County is $124,845, ranking #43 out of 3,222 counties — 66.1% above the national median. The poverty rate is 6.5% and unemployment stands at 5.4%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Monmouth County is $606,100 (+115.0% vs national). Renters pay a median of $1,827/mo and the homeownership rate is 75.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Monmouth County, 51.3% of adults age 25+ hold a bachelor's degree or higher, which is 52.3% above the national average, ranking #85 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Monmouth County is 79.7 years. 12.6% of adults report poor or fair health and 6.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
12.1% of adults in Monmouth County smoke , 29.3% are obese , and 24.6% report excessive drinking. The drug overdose death rate is 27.7 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Monmouth County is 1.5 per 100,000 and the suicide rate is 7.9 per 100,000. Motor vehicle deaths occur at a rate of 6.0 per 100,000.
Homicide Rate Trend
Families & Children
8.0% of children in Monmouth County live in poverty and the infant mortality rate is 3.2 per 1,000 live births. The teen birth rate is 4.7 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Monmouth County is 81.9%. The mean commute time is 35.2 min, which is 27.4% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Monmouth County voted Republican with a margin of 11.4%. The vote was 43.4% Dem / 54.8% Rep. Compared to 2020, the margin shifted 8.6 toward Republicans .
Vote Share Over Time
About Monmouth County, New Jersey
Monmouth County, New Jersey has a total population of 645,353, making it the 109th most populous county in the United States. The median age in Monmouth County is 43.2 years, which is 11.1% above the national median of 38.9 years.
The median household income in Monmouth County is $124,845, which ranks #43 of 3,222 counties nationwide. This is 66.1% above the national median of $75,149. The poverty rate is 6.5%, lower than the national rate of 12.6%. The unemployment rate stands at 5.4%.
The median home value in Monmouth County is $606,100, 115.0% above the national median. Renters in Monmouth County pay a median gross rent of $1,827 per month. The homeownership rate is 75.6%, compared to the national rate of 64.4%.
In Monmouth County, 51.3% of residents aged 25 and older hold a bachelor's degree or higher, 52.3% above the national average of 33.7%. Health insurance coverage stands at 94.7% of the population. The average commute time for workers is 35.2 min.
Monmouth County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 71.5% of the population, followed by Hispanic or Latino (12.9%) and Black (non-Hispanic) (5.8%).
All data for Monmouth 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.