Gayville is a town in Yankton County, South Dakota, United States.

[10] Gayville was a station on the Chicago, Milwaukee, St. Paul and Pacific Railroad.

[11] According to the United States Census Bureau, the town has a total area of 0.21 square miles (0.54 km2), all land.

There were 179 housing units at an average density of 852.4 per square mile (329.1/km2).

28.2% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.

There were 182 housing units at an average density of 949.7 per square mile (366.7/km2).

30.2% of all households were made up of individuals, and 16.0% had someone living alone who was 65 years of age or older.