MDI Research Facilities:

Cranberry Isles - William Otis Sawtelle Collections and Research Center
Collections pertaining to the the Cranberry Isles and Acadia National Park

Islesford Historical Society
Dedicated to researching and publishing the history of the Cranberry Isles.

Northeast Harbor Library
Houses an array of special collections in its archives. The library's climate-controlled archives feature manuscripts, typescripts, clippings, maps and charts, photographs and architectural prints and drawings — all available to scholars by appointment.

Otter Creek Historical Society and Museum, Inc.
Historical Information pertaining to Otter Creek

Ralph Stanley Research Room at the Sound School House Museum
Includes Mount Desert Island and Maine history, genealogical information and a historic preservation library.