Schools in Sumner, Maine, the US. Schools locations in Sumner, Maine. Find the nearest schools locations, near you. All types of business services School All schools in Sumner Hartford-Sumner Elementary School School +1 207-388-2681 145 Main Street, Sumner, Maine 04292 Write a review Phone Directions West Sumner Christian School School +1 207-388-2716 854 Main Street, Sumner, Maine 04292 Write a review Phone Directions