Mapping Options

Download NHGIS Boundary Files

The NHGIS data extraction system provides digital mapping data in the shapefile format for historical census tracts, counties, states, and metropolitan statistical areas. In order to use these data, the user must have access to a Geographic Information System (GIS) that will read shapefiles.

NHGIS provides two methods for obtaining mapping data (boundary files).

• If you want only the GIS boundary files, please use the Shape Finder. (You will need to be a registered NHGIS user to access the Shape Finder.)

• You may also request a GIS boundary file when you create a statistical data extract. If you would like to select GIS boundary files and statistical data simultaniously, please use the Data Finder. (You will need to register be a registered NHGIS user to access the Data Finder.) The option to download a corresponding boundary file will be given while selecting your data format.

Create Maps Online

Social Explorer allows online mapping of select NHGIS data. Social Explorer is developed at Queens College of the City University of New York using data provided by the NHGIS. The objective of Social Explorer is to help visually analyze and understand the demography of the US through the use of interactive maps and data reports.