Mountain Lake, New Jersey
Census designated place in Warren County, New Jersey
| Census | Population |
|---|---|
| 2010 | 575 |
| 2020 | 494 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2010 Summary File 1: total population, place level, state 34, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 34, retrieved November 14, 2026.
| Measure | Mountain Lake | Warren County | New Jersey |
|---|---|---|---|
| Population | 566 | 110,238 | 9,267,014 |
| Median household income | $99,063 | $99,596 | $101,050 |
| Median age | 56.1 | 43.9 | 40.1 |
| Median home value | $329,900 | $323,100 | $427,600 |
| Bachelor’s degree or higher | 23.0% | 36.4% | 42.9% |
| Foreign-born residents | 7.4% | 10.3% | 23.5% |
| Owner-occupied homes | 90.7% | 74.3% | 63.7% |
| Mean commute to work | 30.7 minutes | 34.1 minutes | 30.9 minutes |
Source: American Community Survey 5-year data profile 2019–2023, place level, state 34, retrieved November 14, 2026.
Median household income $99,063 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 34, retrieved November 14, 2026.
- Owner occupied
- 224 units
- Renter occupied
- 23 units
- Vacancy rate
- 18.2%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, place level, state 34, retrieved November 14, 2026.
Community
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Nearby towns
- ButtzvilleCensus designated place
- BridgevilleCensus designated place
- Liberty TownshipTownship
- Hope TownshipTownship
- White TownshipTownship
- Oxford TownshipTownship
- OxfordCensus designated place
- HopeCensus designated place
- Mount HermonCensus designated place
- DelawareCensus designated place
Other towns in Warren County
- AllamuchyCensus designated place
- Allamuchy TownshipTownship
- AlphaBorough
- AndersonCensus designated place
- AsburyCensus designated place
- BeattystownCensus designated place
- BelvidereTown
- Blairstown TownshipTownship
- BlairstownCensus designated place
- BrainardsCensus designated place
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- Type
- Census designated place
- County
- Warren County
- Within
- Liberty Township
- Land area
- 1.13 sq mi
- Water area
- 0.18 sq mi
- Population
- 566 (2019-2023 estimate)
- Households
- 247
- Median age
- 56.1
- Median household income
- $99,063
- Median home value
- $329,900
- Median gross rent
- $1,795
- Owner-occupied homes
- 90.7%
- Bachelor’s degree or higher
- 23.0%
- Foreign-born residents
- 7.4%
- Mean commute to work
- 30.7 minutes
- Census GEOID
- 3448450
Sources: Census Gazetteer 2025: places, retrieved November 14, 2026; American Community Survey 5-year data profile 2019–2023, place level, state 34, retrieved November 14, 2026.
- ZIP codes
- 07823
- Metro area
- Allentown-Bethlehem-Easton, PA-NJ
Sources: Census 2020 ZCTA relationship file: ZCTAs to places, retrieved November 14, 2026; Census Gazetteer 2025: metropolitan and micropolitan areas, retrieved November 14, 2026.