Middlesex borough, New Jersey
Official LSAD Designation: Middlesex borough • Census GEOID: 3445900
• Middlesex County
Demographics & Population Profile
Population and demographics for Middlesex borough.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 14,740 | — | 2025 | Census |
| Median Age | 44.3 yrs | ±3.7 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 5,718 | ±406 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).