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I use NHGIS to get summary data from the census - not just historical data, but even the 2000 Census. However, when I try to get data for zip codes, I can only get data for one zip code at a time. Is there a solution for this?
NHGIS has revised their interface and they now allow an 'all zip code' request.
Here is the guide to the new interface:
If your institution has a license to Social Explorer we recommend using it. It is a very intuitive utility.