The ACLU of Massachusetts—a private, nonpartisan organization with more than 82,000 supporters across the Commonwealth and over 100,000 online activists—is a state affiliate of the national ACLU. We defend the principles enshrined in the Massachusetts Declaration of Rights, as well as the U.S. Constitution and Bill of Rights. Learn more about the history of the ACLU of Massachusetts, the range of issues we cover, and the national ACLU's work and history.