Berkshire Athenaeum Library Catalog: Collection offers histories for nearly every town in the Commonwealth, with a focus on the Berkshires and western Massachusetts.
Boston Library Consortium: Cooperative association of sixteen academic and research libraries which supports resource sharing and enhancement of services through programs.
Massachusetts Libraries: Directory of library websites includes state, public and academic.
Massachusetts Library and Information Network (MLIN): Gateway to information about libraries in Massachusetts, including detailed directory information, library homepages and special services.
Northeast Massachusetts Regional Library System: Community of academic, public, school and special libraries and media centers which collaborates to share resources.
Southeastern Massachusetts Library System: Established to promote resource sharing among member institutions.
State Library of Massachusetts: Includes information on genealogy, legislative history, special collections, and legal research resources.