Schools in Seneca, South Dakota, the US. Schools locations in Seneca, South Dakota. Find the nearest schools locations, near you. All types of business services School All schools in Seneca Latham School School Seneca, Seneca, South Dakota 57473 Write a review Phone Directions North Canton School School Seneca, Seneca, South Dakota 57473 Write a review Phone Directions Seneca Common School School Seneca, Seneca, South Dakota 57473 Write a review Phone Directions