Schools in Casco, Wisconsin, the US. Schools locations in Casco, Wisconsin. Find the nearest schools locations, near you. All types of business services ATM Finance Lawyer School All schools in Casco Holy Trinity Parish & School School +1 920-837-7532 Casco, Casco, Wisconsin 54205 Write a review Phone Directions Holy Trinity School School +1 920-837-7531 510 Church Avenue, Casco, Wisconsin 54205 Write a review Phone Website Directions