Schools in Ethan, South Dakota, the US. Schools locations in Ethan, South Dakota. Find the nearest schools locations, near you. All types of business services Insurance School All schools in Ethan Coyne School School Ethan, Ethan, South Dakota 57334 Write a review Phone Directions School Number 1 School Ethan, Ethan, South Dakota 57334 Write a review Phone Directions School Number 1 School Ethan, Ethan, South Dakota 57334 Write a review Phone Directions