Monmouth County, New Jersey Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Monmouth County, NJ Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
A
Health Above averageHealthier than 75% of counties in New Jersey
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A
Income Above averageAmong the top 5 wealthiest counties in New Jersey
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A
Education Above averageAmong the top 5 best educated counties in New Jersey
Source: Map AI Methodology
Population: density and quick facts
| Metric | Monmouth County | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Population | 645,196 | 9,334,304 | 337,468,954 |
| Population density (per sq mi) | 976.1 | 1071.4 | 86.4 |
| Population growth (%/yr) | 0.36% | 0.59% | 0.59% |
| Median age | 41.4 | 40.2 | 37.3 |
| Households | 251,537 | 3,503,323 | 130,235,071 |
Population in Monmouth County grew by 0.4% from 2009 to 2024, reaching 645,196 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Monmouth County is Gen X, aged 45–60, at 23.7% of residents. That is 2.3 points above New Jersey as a whole.
- Gen Z 13–28 126,138 19.6% -0.6 pts
- Millennials 29–44 124,623 19.3% -2.5 pts
- Gen X 45–60 153,208 23.7% +2.3 pts
- Boomers 61–79 119,823 18.6% +1.7 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below New Jersey, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.0% of the people living in Monmouth County and men 49.0%.
- Women 51.0% New Jersey 50.9%
- Men 49.0% New Jersey 49.1%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Monmouth County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Monmouth County has a the economy index of A, which means it is very prosperous.
| Metric | Monmouth County | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Median household income | $124,868 | $103,817 | $80,455 |
| Income growth (%/yr) | 4.45% | 4.37% | 4.80% |
| Unemployment rate | 5.4% | 6.3% | 5.2% |
The median household income in Monmouth County is about 20% higher than in New Jersey.
Housing
| Metric | Monmouth County | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Median home price | $433,523 | $352,792 | $248,835 |
| Median rent | $1,826 | $1,719 | $1,407 |
| Homeownership rate | 75.6% | 63.8% | 65.2% |
The median home price in Monmouth County is about 19.8 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,826 per month for that long.
Commute Time & Mobility
Commuters in Monmouth County spend about 51 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 214 hours, about 8.9 full days, spent commuting.
| Metric | Monmouth County | New Jersey Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.7 | 26.2 | 22.4 |
| Round-trip commute (min) | 51.4 | 52.4 | 44.8 |
| Yearly time spent (hours) | 214 | 218 | 187 |
| Estimated yearly cost | $6,634 | $6,764 | $5,790 |
| Work from home | 18.9% | 16.8% | 15.0% |
| Highway traffic (vehicles/day) | 13,648 | 14,317 | 8,813 |
| Local road traffic (vehicles/day) | 2,307 | 2,109 | 1,355 |
Fastest commutes among counties in
New Jersey:
Cape May County (18.1 min), Cumberland County (21.2 min), Atlantic County (21.6 min).
Slowest:
Hudson County (32.7 min), Sussex County (32.6 min), Hunterdon County (31.0 min).
The average commute time in Monmouth County is about the same as in New Jersey.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Monmouth County has a education index of A, which means it is very educated.
| Metric | Monmouth County | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 47.3% | 39.6% | 31.6% |
| Average household size | 2.54 | 2.61 | 2.53 |
Highest education index among counties in
New Jersey:
Somerset County (0.4), Morris County (0.4), Hunterdon County (0.4).
Lowest:
Cumberland County (0.2), Salem County (0.2), Passaic County (0.3).
Health
Monmouth County has a health index of A, which means it is very healthy.
| Metric | Monmouth County | New Jersey Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.8 | 79.4 | 78.3 |
| Self-rated poor health | 10.9% | 12.9% | 16.3% |
| Smokers | 12.3% | 14.2% | 19.0% |
Highest health index among counties in
New Jersey:
Morris County (0.8), Hunterdon County (0.8), Somerset County (0.8).
Lowest:
Cumberland County (0.8), Salem County (0.8), Passaic County (0.8).
Monmouth County, NJ Compared With Nearby Counties
Monmouth County, NJ is typical in size for this group, 645,196 residents against a local median of 654,303, so the measures below are close to a like for like comparison. The measure that sets Monmouth County, NJ apart most is median household income: $124,868, 27% above the local median of $98,311. That is the better end of the local range on this measure.
The counties themselves spread $31,498 on median household income, so Monmouth County, NJ sits at one end of an already wide local range rather than apart from it. Monmouth County, NJ has the highest median household income of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Monmouth County, NJ | 645,196 | $124,868 #1/6 | $433,523 #4/6 | 25.7 min #2/6 |
| Richmond County, NY | 494,794 | $98,311 | $552,254 | 35.5 min |
| Middlesex County, NJ | 870,701 | $112,064 | $279,129 | 26.6 min |
| Union County, NJ | 578,268 | $104,008 | $435,289 | 26.1 min |
| Kings County, NY | 2,630,245 | $80,565 | $977,210 | 41.6 min |
| Ocean County, NJ | 654,303 | $90,726 | $381,212 | 23.4 min |
Frequently Asked Questions
Common questions about Monmouth County, New Jersey.
How big is Monmouth County, New Jersey by population?
About 645,196 people live in Monmouth County, New Jersey, in 251,537 households of 2.5 people on average. The median age is 41.4, so residents are older than the U.S. median of 37.3 by about 4 years.
How densely populated is Monmouth County, New Jersey?
Averaged over its land area, Monmouth County, New Jersey has 976 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 11 times the U.S. average of 86.
Can a typical household afford a home in Monmouth County, New Jersey?
The median home costs 3.5 times the median household income ($433,523 against $124,868), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,826 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How educated are people in Monmouth County, New Jersey?
47.3% of adults in Monmouth County, New Jersey hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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