trenton is in what county
Sponsored Topics. Trenton is a city in Gilchrist County, Florida, United States. The population is projected to be 1,722 as of April 1, 2008. It is the county seat of Gilchrist County. Trenton is located at 29Â°36â²54â³N 82Â°49â²4â³W / 29.615Â°N 82.81778Â°W / 29.615; -82.81778 (29.615081, -82.817732).