Mountain Lakes borough, New Jersey
Official LSAD Designation: Mountain Lakes borough • Census GEOID: 3448480
• Morris County
Demographics & Population Profile
Population and demographics for Mountain Lakes borough.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 4,649 | — | 2025 | Census |
| Median Age | 43.4 yrs | ±1.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,443 | ±85 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).