Massachusetts House Legislative Districts as signed into law on November 3, 2011. These districts were based on demographic data from the 2010 U.S. Census and are used for elections in 2012 and beyond until the districts are redrawn.

Updated on January 15, 2021, with legislator changes from recent elections and vacancies. Additional geometry edits published on March 15, 2021. Minor edits were made to boundaries in Boston on March 7, 2018 to reflect corrected data from the City of Boston. In November 2018 MassGIS made minor edits to boundaries statewide where they were offset enough from survey-based municipal lines to result in address points being assigned to the wrong district. These boundary changes have not been incorporated into U.S. Census geography that forms the basis for this layer.