It was held in 2020 that it is named after Nashua, New Hampshire, the native town of one of its founders.

There were 753 housing units at an average density of 257.7 per square mile (99.5/km2).

Hispanic or Latino persons of any race comprised 0.5% of the population.

There were 787 housing units at an average density of 273.3 per square mile (105.5/km2).

The racial makeup of the city was 98.6% White, 0.4% African American, 0.5% Asian, and 0.5% from two or more races.

31.5% of all households were made up of individuals, and 17.7% had someone living alone who was 65 years of age or older.

There were 739 housing units at an average density of 300.6 per square mile (116.1/km2).

27.1% of all households were made up of individuals, and 16.8% had someone living alone who was 65 years of age or older.

[10] It was established on July 1, 1997, by the merger of the Nashua and Plainfield school districts.