[3] The U.S. Census Bureau and the USGS list the village's name as De Witt, although the name DeWitt (no space) is used locally and by the U.S.

According to the 2021 census gazetteer files, De Witt has a total area of 0.24 square miles (0.62 km2), all land.

[5] As of the 2020 census[3] there were 160 people, 85 households, and 59 families residing in the village.

There were 80 housing units at an average density of 337.55 per square mile (130.33/km2).

30.59% of all households were made up of individuals, and 15.29% had someone living alone who was 65 years of age or older.