When registering to use IPUMS NHGIS, users agreed to the terms below. To register to use IPUMS NHGIS, see register.
Redistribution: You will not redistribute the data without permission
You may publish a subset of the data to meet journal requirements for accessing data related to a particular publication. Contact us for permission for any other redistribution; we will consider requests for free and commercial redistribution.
Citation: Cite the NHGIS data appropriately
For information on proper citation refer to citation and use. Publications and research reports making use of NHGIS should be added to our Bibliography.