
Trenton
- County:
- Clinton County
- County Seat:
- No
- Area (mi²):
- 1.883
- State:
- Illinois
Trenton is a city located in Clinton County, Illinois. Trenton has a 2025 population of 2,615. Trenton is currently declining at a rate of -0.49% annually and its population has decreased by -2.5% since the most recent census, which recorded a population of 2,682 in 2020.
The average household income in Trenton is $94,314 with a poverty rate of 12.16%. The median age in Trenton is 38.1 years: 37.7 years for males, and 38.2 years for females.