According to the 2021 census gazetteer files, Papineau has a total area of 0.21 square miles (0.54 km2), all land.

[4] As of the 2020 census[2] there were 133 people, 61 households, and 42 families residing in the village.

There were 65 housing units at an average density of 312.50 per square mile (120.66/km2).

The racial makeup of the village was 96.24% White, 0.75% African American, 0.00% Native American, 0.00% Asian, 0.00% Pacific Islander, 0.75% from other races, and 2.26% from two or more races.

31.15% of all households were made up of individuals, and 13.11% had someone living alone who was 65 years of age or older.