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- ESRI Shapefiles (arc and polygon)
- ArcMap layer files (.lyr) (for ArcMap 10 and 9.0*)
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The Massachusetts House Legislative Districts datalayer reflects the state House of Representatives district boundaries as defined by Massachusetts General Laws, Chapter 57: Section 4. These 160 districts are those used in the Fall 2012 elections and beyond, until they are redrawn based on the 2020 decennial Census. The names of the statewide datalayers are HOUSE2012_POLY (polygons) and HOUSE2012_ARC (arcs). These replace the older HOUSE02_ARC and HOUSE02_POLY layers.
View and query these data in the Legislative District Viewer. Users may search for their district based on municipality, legislator, or district name. When identifying the districts, the results contain links to their representative's Web pages.
Staff at the Massachusetts House of Representatives developed this layer with its contractor, Caliper Corp. (Newton, MA), using Maptitude for Redistricting software. MassGIS appended the 1:100,000 coastline and state outline and added the attribute fields. Election results are obtained from the Secretary of State.
The HOUSE2012_POLY attribute table has the following fields:
FIELD NAME WDTH / TYPE DESCRIPTION DIST_CODE 10 / C District code, from Redistricting Committee REPDISTNUM 5 / I Unique number for each district REP_DIST 40 / C Name of the district REP_FIRST 14 / C First name of representative REP_LAST 25 / C Last name of representative REP_PARTY 3 / C Political party of representative REP 40 / C Rep.'s full name and party URL 150 / C Rep.'s Web site address
In the HOUSE2012_ARC attribute table, the field OUTLINE is coded as follows:
- 0 = Internal district boundaries
- 1 = State
- 2 = Coastline
MassGIS maintains the layer and will make updates as needed. In January 2015 the polygon attributes were updated with the information for members of the 189th General Court. In May 2015 the attributes were updated with the results of recent special elections in the 1st Suffolk and 11th Worcester districts. In November 2015 the polygon attributes were edited to reflect the recent openings in the 9th Plymouth and 12th Essex districts. In May 2016 the polygon attributes were updated to reflect the results of recent special elections.
Last Updated 5/16/2016