[2] According to the 2021 census gazetteer files, La Harpe Township has a total area of 37.31 square miles (96.63 km2), all land.

[3] (This list is based on USGS data and may include former settlements.)

As of the 2020 census[1] there were 1,377 people, 752 households, and 463 families residing in the township.

There were 673 housing units at an average density of 18.04 per square mile (6.97/km2).

38.20% of all households were made up of individuals, and 25.00% had someone living alone who was 65 years of age or older.