Trenton
- County:
- Mercer County
- County Seat:
- No
- Area (mi²):
- 7.606
- State:
- New Jersey
Trenton is a city located in Mercer County, New Jersey. Trenton has a 2026 population of 91,193. Trenton is currently growing at a rate of 0.9% annually and its population has increased by 0.71% since the most recent census, which recorded a population of 90,546 in 2020.