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  1. Dartmouth Libraries
  2. Research Guides
  3. Dartmouth Libraries Guides
  4. Census Data
  5. NHGIS

Census Data

Every 10 years, the United States government is required to count all of its citizens. This is a guide to the Decenniel Census. The government not only tries to count all of us, but also gathers different types of data about all of us.
  • Introduction
  • The Basics
  • Decennial CensusToggle Dropdown
    • 2020 Census
    • 2010 Census
    • 2000 Census
  • American Community Survey
  • Questionnaires & more ...
  • CensusCD products
  • Census Data by ZIP Code
  • Historic Census Data
  • NHGIS
  • Online Census Data
  • TIGER Files
  • Mapping Census Data
  • PUMS
  • CPS
  • Estimates & Projections
  • International Data
  • Census Data & Genealogy
  • Understanding Census Geography
  • Census maps
  • ArcGIS for Excel
  • Geographic Information Systems
  • GIS Software & Manuals

NHGIS

NHGIS (National Historical Geographic Information System)

"The National Historical Geographic Information System (NHGIS) is a project created to freely disseminate a database incorporating all available aggregate census information for the United States between 1790 and 2010."

The NHGIS consists of three major components:

  • Collected and enriched historical and contemporary U.S. Census summary data.
  • Incorporated data into a Geographic Information Systems framework.
  • Created a web-based system for access to both census data and the metadata.

The great bulk of the United States summary census data exist in machine-readable form, but they were largely inaccessible. Over 670 gigabytes of data covering the period 1790 through 2010 exist or are in preparation, but they are scattered across dozens of archives and stored in incompatible formats on CD-ROM, magnetic tape, or paper.

Only a small fraction of these data are available on the Internet, and even those offer only primitive documentation an extraction tools. Moreover, census summary data cannot be effectively exploited without clear definitions of each geographic unit, but high-quality electronic boundary files exist only for the 1990 census year."

You MUST establish an account to download any data.

To see what data is available, click here.

Don't forget to cite the Center when using their data.

For help you can always contact the Evans Map Room, but their User Guide and FAQs are very good.

The NHGIS is made possible by the Minnesota Population Center at the University of Minnesota, Twin Cities campus.

  • << Previous: Historic Census Data
  • Next: Online Census Data >>
  • Last Updated: Feb 27, 2025 3:46 PM
  • URL: https://researchguides.dartmouth.edu/census
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Subjects: Multidisciplinary
Tags: ACS, American Community Survey, current_population_survey, estimates, international_data, projections, questionnaires, TIGER files

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