If you are having difficulties with the NHGIS extract system, data, or documentation, please email the User Support team for assistance. Please be as detailed as possible so we can better address the problem.
Please send assistance requests to firstname.lastname@example.org
Many people have taken part in creating the NHGIS. This page lists all those involved, both past and present.
Support NHGIS and the Minnesota Population Center with a donation to the MPC Fund through the University of Minnesota Foundation.