Trenton is a city in Clinton County, Illinois, United States. The population was 2,690 at the 2020 census. There is, however, a small portion of St. Clair County, Illinois inside Trenton.

History

The town was laid out by A. W. Casad in 1836 from Trenton, New Jersey, who gave his new town the name Trenton after the place he was from. The planned town was supposed to be built just north of the Ohio and Mississippi Railroad in an area which is now called “Old Trenton”. However, the old town was abandoned as no one ever built in the lots they bought. In response to his failed venture, Mr. Casad returned to his hometown of Trenton, New Jersey. Mr. William Lewis, A. W. Casad's brother in law however didn't go back to New Jersey. Instead, he opted to stay and in 1818 built a farmhouse where the current town lies today.

In 1853 Mr. Buckman built a railroad depot and even managed to get a post office to be established. However, his business partner Mr. Walker abandoned him, which made Buckman move out of the area. Buckman would eventually resettle in Iowa.

Demographics

2020 census

As of the 2020 census, Trenton had a population of 2,690, with 1,162 households and 644 families residing in the city. The population density was , and there were 1,245 housing units at an average density of .

The median age was 41.2 years. 20.6% of residents were under the age of 18 and 20.8% were 65 years of age or older. For every 100 females, there were 92.8 males, and for every 100 females age 18 and over, there were 90.3 males.

There were 1,245 housing units, of which 6.7% were vacant. The homeowner vacancy rate was 3.0% and the rental vacancy rate was 9.8%.