
Jamesburg
- County:
- Middlesex County
- County Seat:
- No
- Area (mi²):
- 0.882
- State:
- New Jersey
Jamesburg borough is located in Middlesex County, New Jersey. Jamesburg borough has a 2025 population of 5,751. Jamesburg borough is currently growing at a rate of 0.14% annually but its population has decreased by -0.21% since the most recent census, which recorded a population of 5,763 in 2020.
The average household income in Jamesburg borough is $123,551 with a poverty rate of 4.23%. The median age in Jamesburg borough is 36.7 years: 33.3 years for males, and 39.7 years for females.