Monmouth Junction, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Monmouth Junction, New Jersey had a total population of 9,141, the 178th largest community in New Jersey, with a median household income of $133,585, which is 29% higher than the state average. The poverty rate is 6.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- 75.8% of adults hold a bachelor's degree or higher — top 10% in New Jersey.
Monmouth Junction Quick Facts
How Monmouth Junction Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 9,457 | 9,141 | -3.3% |
| Median household income | $125,892 | $133,585 | +6.1% |
| Median home value | $497,100 | $552,900 | +11.2% |
How Monmouth Junction Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 66 | National average: 61
Education
Educational Attainment (Adults 25+)
Monmouth Junction Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Middlesex County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| New Brunswick | 56,345 | $65,810 | 32.0% | $353,800 |
| Perth Amboy | 55,855 | $61,977 | 20.2% | $370,600 |
| Sayreville | 45,838 | $99,979 | 6.2% | $444,100 |
| Old Bridge | 28,236 | $111,996 | 6.9% | $485,800 |
| Carteret | 25,496 | $96,862 | 8.2% | $405,800 |
| South Plainfield | 24,473 | $130,239 | 3.0% | $470,900 |
| Woodbridge | 20,756 | $104,926 | 11.1% | $390,000 |
| Iselin | 19,551 | $109,500 | 7.9% | $426,800 |
| Colonia | 18,587 | $122,713 | 7.4% | $493,100 |
| Avenel | 17,121 | $101,670 | 7.9% | $401,000 |
Cities Similar to Monmouth Junction
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Leonia | 9,336 | $129,665 | $672,900 | 61.0% | 4.3% |
| North Haledon | 8,778 | $125,313 | $547,600 | 41.0% | 3.3% |
| Ashland | 9,320 | $118,500 | $336,200 | 54.2% | 6.4% |
| Whippany | 8,970 | $151,420 | $615,400 | 55.4% | 3.9% |
| Flanders | 8,809 | $147,367 | $552,900 | 53.8% | 3.8% |
Population Overview
Monmouth Junction is a small city located in New Jersey, within Middlesex County. The total population is 9,141. It ranks as the 178th most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Monmouth Junction is 39.9 years. This is about the same as the state median of 40.1 years.
Economy, Income & Housing
The median household income in Monmouth Junction is $133,585. This is 29% higher than the state median of $103,556. It is also 65% higher than the national median of $80,734. The poverty rate stands at 6.2%. This is 36% lower than the state poverty rate of 9.7%. The unemployment rate is 4.3%. This is 32% lower than the state rate of 6.3%. The median home value is $552,900. Housing costs are 22% higher than the state median of $454,400. The home-value-to-income ratio is 4.1x. 64.1% of occupied housing units are owner-occupied.
Race & Ethnicity
The largest racial or ethnic group in Monmouth Junction is Asian, making up 59.9% of the population. White (non-Hispanic) residents account for 26.9%. The Black or African American population (4.7%) is well below the state average of 12.2%. The Hispanic or Latino population (4.8%) is well below the state average of 22.5%. The Asian population is significantly higher than the state average (59.9% vs 10.1%).
Education
75.8% of residents aged 25 and older hold a bachelor's degree or higher. This places Monmouth Junction in the top 10% of all cities in the state for educational attainment. This is 74% higher than the state rate of 43.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.0%. Notably, 39.4% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Monmouth Junction, New Jersey is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New Jersey state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 700 Census-designated places in New Jersey. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Monmouth Junction, New Jersey?
Monmouth Junction, New Jersey has a population of 9,141 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Monmouth Junction, NJ?
The median household income in Monmouth Junction is $133,585, which is 65% higher than the national median of $80,734.
What is the poverty rate in Monmouth Junction, NJ?
The poverty rate in Monmouth Junction is 6.2%. This means approximately 570 residents live below the federal poverty line.
What is the racial makeup of Monmouth Junction, New Jersey?
Monmouth Junction's population is 26.9% White, 4.7% Black, 4.8% Hispanic/Latino, and 59.9% Asian.
What is the median home value in Monmouth Junction, NJ?
The median home value in Monmouth Junction is $552,900. The home-value-to-income ratio is 4.1x.
How educated is Monmouth Junction, New Jersey?
75.8% of adults (25+) in Monmouth Junction hold a bachelor's degree or higher, and 39.4% hold a graduate or professional degree.