Interlaken borough, New Jersey
Official LSAD Designation: Interlaken borough • Census GEOID: 3434200
• Monmouth County
Demographics & Population Profile
Population and demographics for Interlaken borough.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 826 | — | 2025 | Census |
| Median Age | 50.7 yrs | ±5.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 364 | ±49 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).