Wilmot is a city in Roberts County, South Dakota, United States.

[7] Wilmot's town and post office were organized in 1881 after a several years period of intense Norwegian homesteading in the area.

[8] According to the United States Census Bureau, the city has a total area of 0.49 square miles (1.27 km2), all land.

There were 237 housing units at an average density of 483.7 per square mile (186.8/km2).

37.5% of all households were made up of individuals, and 18.2% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 90.98% White, 7.00% Native American, 0.37% Asian, and 1.66% from two or more races.

40.7% of all households were made up of individuals, and 23.4% had someone living alone who was 65 years of age or older.