[1] As of the 2020 census[6] there were 801 people, 263 households, and 192 families residing in the village.

There were 370 housing units at an average density of 160.73 per square mile (62.06/km2).

25.86% of all households were made up of individuals, and 11.41% had someone living alone who was 65 years of age or older.

The new name honored John J. Hardin, a former congressman and a colonel in the First Regiment of Illinois Volunteers, who was killed earlier that year in the Mexican–American War.

The seat was temporarily moved to Hamburg, but after an offer from Benjamin Childs of five acres of land and fifty thousand bricks for the new courthouse, as well as a free barbeque dinner, it was decided in a vote that the county seat would be moved in 1847.