The museum campus is composed of two sections. The original heart of the campus is located on both sides of Church Street, and between Church and Reservoir Streets, just north of Main Street (
United States Route 1). Eight of the museum's buildings are on the
National Register of Historic Places, five as part of a listing dedicated to the museum, and three as part of the
Searsport Historic District. Among the collections is a significant photographic archives that includes glass plate negatives documenting life in New England and New York from 1909 and 1947 taken by the Eastern Illustrating & Publishing Company. The photographs are being digitized and made available online for research and access. ==Campus buildings==