National Historical Geographic Information System
Also known as IPUMS NHGIS · NHGIS
The National Historical Geographic Information System (NHGIS) provides free online access to summary statistics and GIS boundary files for U.S. censuses and other nationwide surveys from 1790 through the present.
Getting access
Registration required Restricted (registration)
- How to apply
- Not yet verified — we don’t publish a route we haven’t checked.
Summarised from a registry — the exact application route is not yet verified.
Open access Open
- How to apply
- Not yet verified — we don’t publish a route we haven’t checked.
Summarised from a registry — the exact application route is not yet verified.
About this database
| Website | https://www.nhgis.org/ |
|---|---|
| Subjects | Humanities and Social Sciences · Natural Sciences · Social and Behavioural Sciences · Geosciences (including Geography) · Social Sciences · Economics · Geography · Empirical Social Research · Statistics and Econometrics · Human Geography |
| Last updated | 2026-09-12 |