Schools in Keystone, Nebraska, the US. Schools locations in Keystone, Nebraska. Find the nearest schools locations, near you. All types of business services ATM Bank Finance Real estate School Travel All schools in Keystone Keystone Public School School 420 Jefferson Street, Keystone, Nebraska 69144 Write a review Phone Directions School Number 39 School Keystone, Keystone, Nebraska 69144 Write a review Phone Directions