Mountain Lakes, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Mountain Lakes, New Jersey had a total population of 4,585, the 316th largest borough in New Jersey, with a median household income of $250,000+, which is 141% higher than the state average. The poverty rate is 1.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 141% above the state average — one of the wealthiest communities in New Jersey.
- An exceptionally low poverty rate of 1.3% — among the lowest in New Jersey.
- 85.9% of adults hold a bachelor's degree or higher — top 10% in New Jersey.
- Near full employment with an unemployment rate of just 2.4%.
Mountain Lakes Quick Facts
How Mountain Lakes 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 | 4,535 | 4,585 | +1.1% |
| Median household income | $250,000+ | $250,000+ | +0.0% |
| Median home value | $915,100 | $917,000 | +0.2% |
How Mountain Lakes 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 less diverse community where one racial or ethnic group represents a large majority.
State average: 66 | National average: 61
Education
Educational Attainment (Adults 25+)
Mountain Lakes Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Morris County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Parsippany | 21,345 | $99,405 | 6.7% | $555,400 |
| Morristown | 20,453 | $121,340 | 7.8% | $567,600 |
| Dover | 18,563 | $73,737 | 14.2% | $366,700 |
| Madison | 16,447 | $171,471 | 3.2% | $943,200 |
| Florham Park | 13,564 | $158,696 | 8.7% | $791,400 |
| Lake Hiawatha | 11,018 | $104,663 | 3.4% | $428,600 |
| Pompton Plains | 10,971 | $117,959 | 5.6% | $539,000 |
| Lincoln Park | 10,957 | $123,397 | 2.9% | $443,300 |
| Budd Lake | 10,650 | $114,154 | 4.6% | $456,100 |
| Lake Hopatcong | 10,259 | $117,625 | 4.0% | $424,200 |
Cities Similar to Mountain Lakes
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Ho-Ho-Kus | 4,270 | $250,000+ | $1,092,500 | 82.6% | 0.1% |
| Lyons | 5,187 | $250,000+ | $1,037,400 | 71.0% | 1.9% |
| Demarest | 4,911 | $208,036 | $1,114,600 | 75.9% | 1.1% |
| Mendham | 4,973 | $211,944 | $819,800 | 80.7% | 3.5% |
| Englewood Cliffs | 5,362 | $230,611 | $1,401,600 | 74.7% | 5.3% |
Population Overview
Mountain Lakes is a small community located in New Jersey, within Morris County. The total population is 4,585. It ranks as the 316th most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Mountain Lakes is 43.4 years. This is 8% higher than the state median of 40.1 years. With 32.7% of the population under 18, Mountain Lakes has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Mountain Lakes is $250,000+. This is 141% higher than the state median of $103,556. It is also 210% higher than the national median of $80,734. The poverty rate stands at 1.3%. This is 87% lower than the state poverty rate of 9.7%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 2.4%. This is 62% lower than the state rate of 6.3%. The median home value is $917,000. Housing costs are 102% higher than the state median of $454,400. The home-value-to-income ratio is 3.7x. 96.1% of occupied housing units are owner-occupied. This homeownership rate is 51% higher than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Mountain Lakes is White (non-Hispanic), making up 76.5% of the population. Asian residents account for 13.4%. The White (non-Hispanic) population is significantly higher than the state average (76.5% vs 50.9%). The Hispanic or Latino population (3.8%) is well below the state average of 22.5%.
Education
85.9% of residents aged 25 and older hold a bachelor's degree or higher. This places Mountain Lakes in the top 10% of all cities in the state for educational attainment. This is 97% 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 99.0%. Notably, 45.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Mountain Lakes, 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 Mountain Lakes, New Jersey?
Mountain Lakes, New Jersey has a population of 4,585 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Mountain Lakes, NJ?
The median household income in Mountain Lakes is $250,000+, which is 210% higher than the national median of $80,734.
What is the poverty rate in Mountain Lakes, NJ?
The poverty rate in Mountain Lakes is 1.3%. This means approximately 58 residents live below the federal poverty line.
What is the racial makeup of Mountain Lakes, New Jersey?
Mountain Lakes's population is 76.5% White, 0.0% Black, 3.8% Hispanic/Latino, and 13.4% Asian.
What is the median home value in Mountain Lakes, NJ?
The median home value in Mountain Lakes is $917,000. The home-value-to-income ratio is 3.7x.
How educated is Mountain Lakes, New Jersey?
85.9% of adults (25+) in Mountain Lakes hold a bachelor's degree or higher, and 45.9% hold a graduate or professional degree.