Mountain Lake, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Mountain Lake, New Jersey had a total population of 574, the 604th largest community in New Jersey, with a median household income of $108,056, which is 4% higher than the state average. The poverty rate is 8.5%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Near full employment with an unemployment rate of just 1.4%.
Mountain Lake Quick Facts
How Mountain Lake 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 | 566 | 574 | +1.4% |
| Median household income | $99,063 | $108,056 | +9.1% |
| Median home value | $329,900 | $340,000 | +3.1% |
How Mountain Lake 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 Lake Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Warren County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Phillipsburg | 15,299 | $68,324 | 20.2% | $193,200 |
| Hackettstown | 10,140 | $93,083 | 9.4% | $361,600 |
| Washington | 7,334 | $81,336 | 8.5% | $263,300 |
| Beattystown | 4,917 | $87,500 | 8.2% | $416,000 |
| Panther Valley | 4,553 | $131,169 | 5.3% | $369,900 |
| Greenwich (Warren County) | 2,679 | $164,167 | 2.1% | $468,400 |
| Belvidere | 2,538 | $95,714 | 5.9% | $279,600 |
| Alpha | 2,436 | $90,333 | 5.8% | $261,500 |
| Brass Castle | 1,936 | $152,256 | 3.9% | $410,800 |
| Upper Pohatcong | 1,876 | $103,444 | 4.8% | $280,300 |
Cities Similar to Mountain Lake
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Renaissance at Monroe | 581 | $104,728 | $531,300 | 56.8% | 0.0% |
| Nesco | 555 | N/A | $390,000 | 37.8% | 5.1% |
| Great Meadows | 604 | N/A | $394,600 | 36.9% | 0.0% |
| Vincentown | 531 | $105,547 | $271,500 | 38.9% | 13.0% |
| Three Bridges | 630 | N/A | $587,300 | 29.5% | 1.6% |
A note before these figures: with a population of 574, Mountain Lake's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Mountain Lake is a small community located in New Jersey, within Warren County. The total population is 574. It ranks as the 604th most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Mountain Lake is 55.4 years. This is 38% higher than the state median of 40.1 years. Only 6.3% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The median household income in Mountain Lake is $108,056. This is 4% higher than the state median of $103,556. It is also 34% higher than the national median of $80,734. The poverty rate stands at 8.5%. This is 12% lower than the state poverty rate of 9.7%. The unemployment rate is 1.4%. This is 78% lower than the state rate of 6.3%. The median home value is $340,000. Housing costs are 25% lower than the state median of $454,400. The home-value-to-income ratio is 3.1x. 90.2% of occupied housing units are owner-occupied. This homeownership rate is 41% higher than the state average of 63.8%.
Race & Ethnicity
Mountain Lake has a predominantly White (non-Hispanic) population, comprising 85.9% of all residents. Hispanic or Latino residents account for 12.4%. The White (non-Hispanic) population is significantly higher than the state average (85.9% vs 50.9%). The Asian population (0.7%) is well below the state average of 10.1%.
Education
25.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 41% lower 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 93.8%.
Data Sources & Methodology
All demographic data for Mountain Lake, 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 Lake, New Jersey?
Mountain Lake, New Jersey has a population of 574 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Mountain Lake, NJ?
The median household income in Mountain Lake is $108,056, which is 34% higher than the national median of $80,734.
What is the poverty rate in Mountain Lake, NJ?
The poverty rate in Mountain Lake is 8.5%. This means approximately 49 residents live below the federal poverty line.
What is the racial makeup of Mountain Lake, New Jersey?
Mountain Lake's population is 85.9% White, 0.0% Black, 12.4% Hispanic/Latino, and 0.7% Asian.
What is the median home value in Mountain Lake, NJ?
The median home value in Mountain Lake is $340,000. The home-value-to-income ratio is 3.1x.
How educated is Mountain Lake, New Jersey?
25.6% of adults (25+) in Mountain Lake hold a bachelor's degree or higher, and 8.7% hold a graduate or professional degree.