All persons are granted a limited license to use data and documentation from IPUMS NHGIS, subject to the following conditions:
- 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: You will cite NHGIS appropriately.
Publications and research reports should include the following citation:
Steven Manson, Jonathan Schroeder, David Van Riper, Katherine Knowles, Tracy Kugler, Finn Roberts, and Steven Ruggles. IPUMS National Historical Geographic Information System: Version 18.0 [dataset]. Minneapolis, MN: IPUMS. 2023. http://doi.org/10.18128/D050.V18.0
For policy briefs, online resources, or articles in the popular press, we recommend that you cite the use of NHGIS data as follows:
IPUMS NHGIS, University of Minnesota, www.nhgis.org
Please see the IPUMS NHGIS DOI version history for previous versions of the data and the revision history for documentation about changes to the data over time.
These terms of use are a legally binding agreement. You can use the data only in accordance with these terms, and any other use is a violation of the agreement. Violations may result in revocation of the agreement and prohibition from using other IPUMS data. If IPUMS or our partners are harmed from your violation, you are responsible for all damages, including reasonable attorney’s fees and expenses.
In addition, we request that users provide us with the title and full citation for any publications, research reports, or educational materials making use of the data or documentation. Please add citations to the IPUMS bibliography.