Goodwin is a town in Deuel County, South Dakota, United States, where the population was 147 at the 2020 census.

On May 30, 2022, the town was struck by a tornado that would damage many homes and businesses and would be rated EF3.

There were 62 housing units at an average density of 131.9 per square mile (50.9/km2).

30.5% of all households were made up of individuals, and 5.1% had someone living alone who was 65 years of age or older.

29.5% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.

None of the families and 9.4% of the population were living below the poverty line, including no under eighteens and 18.2% of those over 64.