OBTAINING DATA BY CONGRESSIONAL DISTRICT

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Sources for Data
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1. Decennial Census
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Counts from the decennial census reflect the makeup of the population in the 
year of the decennial census.  Between census years, the counts are restated and new 
files added to reflect changes in congressional boundaries.  Data files from both the 
100% count (person, race/hispanic origin, sex, age, household type) and from the long 
form  sample count (wide range of socio-economic variables) are available.  The list 
concentrates on 100%  data.  100% count data is more accurate but if you need and sample 
variables you should use sample data for all the analysis.  

2. American Commmunity Survey
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This is an annual survey with questions similar to what are asked in the 
decennial census long form.  Counts from this source relate to the year of the survey.

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Interfaces for getting the Data
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American FactFinder (AFF)
  AFF is the Census Bureau's public Internet site, 
      http://factfinder.census.gov/.  
  Downloads from here are done easily with a web-interface.
  1990, 2000 Census and the ACS, starting with 2006, use this interface. 

Census 2000 DVD with Allocate search Engine
  DVDs in this series are all available in EDS.  This interface is easy to 
  use and is best for very large files. Available only on the DSSC workstations
  in Lehman Library.

CensusCD products from Geolytics
  CD-ROM products for 1970, 1980 and 2000. Select this product when the only
  alterntives are FTP. Available only on the DSSC workstations in Lehman Library.
   
Files via ftp
  These file are usually ASCII text file and require data manipulation to 
  use.  The location can vary among:
   DataGate, http://www.columbia.edu/acis/eds/dgate.html
   ICPSR, http://www.icpsr.umich.edu/
   Censu Bureaus' web pages, www.census.gov

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Data options by Congress
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110th Congress -110th Congresssioanl District Census Summary 2000 File 1&3 (100%&sample)
                 use Census DVD (SF1 or 3) or AFF 
              note: only Georgia and and Texas were redrawn for the 110th 

109th Congress -109th Congressional District Census Summary 2000 File 1 & 3
                 use Census DVD (SF1 or 3) or ftp SF1 from Census web site 
               -ACS 2006 use American FactFinder 
              note: only Maine, Pennsylvania, and Texas were redrawn for the 109th

108th Congress - 108th Congressional District Census Summary 2000 File 1 & 3
                 use Census DVD (SF1 or 3) or ftp SF1 from Census web site
              note: reflects post Census 2000 reapportionment

107th Congress - no change from 106th

106th Congress - Census 2000 Summary File 1&3 (100%&sample)
                 use American Factfinder, Census DVD or any of ftp options
               -Census 2000 PL94 Summary File (100% only)
                 use American Factfinder, any of ftp options, or CensusCd (Geolytics)

               -
105th Congress -  105th Congressional District Census 1990 Summary File 1
                  American FactFinder
                  also on Summary Tape File 1D
                  on CD-ROM C3.282/4:105 (.dbf ascii format)
                  data on the five states for which boundaries changed

104th Congress -  104th Congressional District Census 1990 Summary Tape File 1D
                  on CD-ROM C3.282/4:104  (.dbf ascii format)
                  data on the six states for which boundaries changed
                  also on CensusCD (Geolytics)

103rd Congress -  103rd Congressional District Census 1990 Summary Tape File 1D
                  files state-by-state
                  available in DataGate, EDS#1990-1D
                  and on CD-ROM C3.282/4:103 (.dbf ascii format)
                  also available at ICPSR #6011

101st Congress - Summary Tape File 1A
                  files state-by-state
                  available in DataGate, EDS#1990-1A
                  and on CD-ROM C3.282:990  (.dbf ascii format)
                  also available at ICPSR #9575

99th Congress   - Census 1980 Congressional District Equivalency File
                  one file
                  available at ICPSR #8404
                  data on the 10 states for which boundaries changed

98th Congress  - 1980 Summary Tape File 3D Congressional District-level Extract
                  one file (100% and sample)
                  available at ICPSR# 8710
                   also
                  Summary Tape File 1D: files by state by state at ICPSR #8093

96th Congress -  1980 Summary File 1C
                  single nation-ide file
                  available in DataGate, EDS#1980-1C
                  also available at ICPSR #8091 & Geolytics CensusCD (Geolytics)

91st Congress -  1970 Summary Statistics File 1B [First Count]
               files are state-by-state available at ICPSR #8122