Sandborn is a town in Vigo Township, Knox County, Indiana, United States.

State Road 67 passes through the northwestern limits of Sandborn, connecting the town with the Vincennes area to the southwest.

According to the 2010 census, Sandborn has a total area of 0.39 square miles (1.01 km2), all land.

There were 202 housing units at an average density of 517.9 per square mile (200.0/km2).

28.7% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.

There were 214 housing units at an average density of 535.0 per square mile (206.6/km2).

29.0% of all households were made up of individuals, and 16.1% had someone living alone who was 65 years of age or older.