Redistricting Data

Data

113th Congressional and New State Legislative District Plans

These files represent the boundaries of the post-2010 census state legislative and 113th Congressional district plans as collected by the U.S. Census Bureau in Phase 4 of the Redistricting Data Program (RDP). These plans are those understood to be in effect for the November 2012 elections as of their production date. The plans were submitted to the Census Bureau by non-partisan state liaisons, identified by the governor and legislative leadership of each state during Phase 1 of the RDP. Once these plans were processed and inserted into the MAF/TIGER database, the Census Bureau generated verification materials for each state to review and certify as accurate. Any reported changes to the verification materials were incorporated into these final products.

113th Congressional District TIGER/Line Shapefiles

Download through the Shapefile Download Page or via the FTP server by state or by geographic type.

These shapefiles are being released as official TIGER/Line Shapefile products. This version of the TIGER/Line Shapefiles include the 113th Congressional District boundaries by state and as a national file, the State Legislative Districts (2012 election cycle), and the supporting 2010 Census geography. The congressional and state legislative district boundaries are the official boundaries as represented by the state liaisons, in Phase 4 of the Redistricting Data Program, including any split 2010 census tabulation blocks.

The files for the 113th Congressional and State Legislative Districts are identified by their abbreviation within the file name.

• 113th Congressional Districts - cd113
• New State Legislative Districts - Upper House - sldu
• New State Legislative Districts - Lower House - sldl

Block Equivalency Files

CD113 [zip] 52.7MB SLDU [zip] 54.2MB SLDL [zip] 52.6MB

These BEFs are the whole 2010 census tabulation block representations of the plans as submitted to the U.S. Census Bureau. In instances where plans included split blocks, it was requested that the state liaison identify a single district to assign the split block for use by the U.S. Census Bureau for data tabulation purposes. The fields in these files should be imported as text to preserve leading zeros.

Split Block Reports

Where the boundary of a Congressional District or a state legislative district splits a 2010 Census block, the Census Bureau's maps and TIGER/Line files depict its location correctly, but for data tabulation purposes, that block is allocated in its entirety to the Congressional District or state legislative district specified by the state.

• The listing of block splits in the 113th Congressional district plans: 113th CD Block Split Report [PDF] 44KB.
• The listing of block splits in the new state legislative district (upper house) plans: SLDU Block Split Report [PDF] 52KB.
• The listing of block splits in the new state legislative district (lower house) plans: SLDL Block Split Report [PDF] 52KB.

Easy Stats

The Easy Stats data tool has added some 2011 American Community Survey 1-Year estimates for the new 113th Congressional Districts.

Notes:

Congressional and State Legislative:

• The state of Maryland adjusted the 2010 Census P.L [94-171] redistricting data by reallocating state prisoner populations to their last known residence. Information on this adjustment is available on their website. Maryland
• The state of Hawaii adjusted the 2010 Census P.L [94-171] redistricting data to remove non-resident military personnel and non-resident students. Information on this adjustment is available on their website. Hawaii

Congressional Only:

• Congressional districts are identified by a 2-character numeric FIPS code. Congressional districts are numbered uniquely within state. The District of Columbia and the Commonwealth of Puerto Rico have the code of 98, which identifies their status with respect to representation in Congress:
  • 01 to 53—Congressional district codes
  • 00—At large (single district for state)
  • 98—Nonvoting delegate
• In Connecticut, Illinois, and Michigan the state participant did not assign the current (113th) congressional districts to cover all of the state or equivalent area. The code “ZZ” has been assigned to areas with no congressional district defined (usually large water bodies). These unassigned areas are treated within state as a single congressional district for purposes of data presentation.

State Legislative Only:

• A unique 3-character census code, identified by state participants, is assigned to each state’s legislative district upper (senate) and lower (house) within a state. In Connecticut, , Illinois, Louisiana, Maine, Maryland, Massachusetts, Michigan, Ohio, and Puerto Rico, the state participant did not assign the current state legislative districts to cover all of the state or equivalent area. The code “ZZZ” has been assigned to areas with no state legislative districts defined (usually large water bodies). These unassigned areas are treated within state as a single state legislative district for purposes of data presentation.
• The state of Ohio generated their state legislative plans using custom geography from the state’s Ohio Common and Unified Redistricting Database produced by Cleveland State University. These files approximate those plans using Census Bureau geography.
• The state of Kansas adjusted the 2010 Census P.L [94-171] redistricting data to exclude non-resident students and non-resident military personnel and to include resident students and members of the military at the place of their permanent residence for state legislative redistricting. Information on this adjustment is available on their website. Kansas
• The state New York adjusted the 2010 Census P.L [94-171] redistricting data by reallocating state prisoner populations to their last known residence. Information on this adjustment is available on their website. New York
• The state of New Hampshire uses floterial districts in their lower-chamber (SLDL) plan. Floterial districts are overlay districts made up of two or more discrete districts. These discrete or component districts are those represented in the New Hampshire SLDL TIGER/Line shapefile. A listing of the floterial districts and their component districts is available as a report Floterial Report [PDF] 1MB and as a comma delimited text file Floterial Text File [csv] 15KB.
• Nebraska has a unicameral legislature and the District of Columbia has a single council, both of which the Census Bureau treats as upper-chamber legislative areas for the purpose of data presentation. Therefore, there are no data by the lower house of the state legislative districts for either Nebraska or the District of Columbia.
• The Commonwealth of Puerto Rico legislative district files are included with the state legislative districts.

For further information, please contact Cathy McCully, Chief, or James Whitehorne, Assistant Chief, of the Redistricting Data Office at 301-763-4039 or via email at RDO@census.gov.