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I am looking for a source for data to determine voting precinct boundaries in the United States. My thought is that they might be on the Census website but under a name that doesn't make it obvious.

Does anyone have a working link (or set of instructions) that will allow me to find that information?

  • Err, for which country? – BradHards Oct 31 '13 at 2:04
  • @BradHards USA. – Steve Horn Oct 31 '13 at 3:17
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You may want to take a look at the Harvard Election Data Archive, which is for the 2008 elections. Curiously the shape files don't come with a .prj file, but that can be fixed. Also, boundary files are not available for all the states, unfortunately.

  • This is a good answer, but the first example I checked (my own address), I found that the data was out of date. – Steve Horn Oct 31 '13 at 17:20
  • Thanks, @Steve Horn for pointing this out. Yes, those are for 2008. I am adding it to my answer as another limitation. – cengel Oct 31 '13 at 22:28
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There is a github repository that seeks to maintain up-to-date precinct shapefiles by github user aaron-strauss.

From the README:

Voting Precinct Shapefiles in the United States

This project aims to catalog as many shapefiles of precincts (in some states "voting tabulation districts", or "election districts") across the United States. The priority is to obtain current shapefiles, namely more recent than 2010.

Note that the repo organizes data by state, and for some states it provides an external link to a shapefile rather than the shapefile itself.

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The Election Geodata git repository seems like a promising source.

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