Geographic information systems (GIS) data featuring the United States as a whole, or individual states.
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- NOS Data Explorer Offers interactive mapping tools that allow users to locate NOS products in any area in the United States and its territories through a metadata catalog.
- Louisiana Statewide GIS Contains GIS and mapping data on the state of Louisiana.
- Infoshare: Community Data on New York City Profile and compare neighborhoods, and produce original tables.
- NH GRANIT New Hampshire's statewide GIS data clearinghouse.
- PASDA Official public access geospatial information clearinghouse for the state of Pennsylvania.
- MassGIS GIS data layers for the state of Massachusetts.
- Vermont Center for Geographic Information Stores and distributes geospatial data for the state of Vermont.
- Rainwater Basin GIS Data Site Provides free GIS data sets pertaining to the Rainwater Basin wetlands in Nebraska.
- Community Mapping Network Created to share a wealth of natural resource information and maps with communities in British Columbia, Canada. Allows users to add data.
- National Historical Geographic Information System Provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States from 1790 to the present.
- Alaska State Geo-spatial Data Clearinghouse Alaska state and local government geospatial maps and data.
- Florida Geographic Data Library Spatial (GIS) data for the state of Florida.
- Indiana Spatial Data Portal Provides access to more than 17 terabytes of Indiana geospatial data.
- Maine GIS Data Catalog Provides access to the digital geographic data produced by the GIS Executive Council and Maine GeoLibrary Board.
- MiGDL Center for Geographic Information provides GIS data and maps for the state of Michigan.
- Minnesota Geographic Data Clearinghouse Source for geographic data and maps for the state of Minnesota.
- Kentucky Geological Survey's Geospatial Data Library Electronic maps and GIS data for the state of Kentucky.
- Mississippi Geospatial Clearinghouse Provides access to the GIS data resources of Mississippi.
- Missouri Spatial Data Information Service Provides public access to GIS and census data about the state of Missouri.
- Montana Geographic Information Clearinghouse Comprehensive collection of geospatial data for the state of Montana.
- New Jersey GIS Department GIS data and mapping services for the state of New Jersey.
- North Dakota GIS Portal to North Dakota geospatial data and information.
- OGRIP Provides access to Ohio GIS data.
- Oregon Geospatial Enterprise Office Coordinates, develops and maintains geographic information for the state of Oregon.
- South Carolina GIS Geospatial data and information on the South Carolina Geographic Information Council.
- South Dakota GIS GIS data and maps for the state of South Dakota.
- West Virginia GIS Technical Center Provides GIS data and services for the state of West Virginia.
- Mississippi Automated Resource Information System GIS data clearinghouse for the state of Mississippi.
- Kansas Geospatial Community State of Kansas Data access and support center (DASC). DASC catalogues, archives, and distributes databases with FGDC compliant metadata and direct FTP access.
- NC OneMap GIS data for the state of North Carolina.
- Rhode Island GIS Data clearinghouse for the state of Rhode Island.
- Tennessee Spatial Data Server GIS data for the state of Tennessee. DOQQs, DRGs, DEMs, boundaries, wetlands, and geology.
- Hawaii Statewide GIS Program Free downloadable GIS spatial data, metadata, and maps.
- New York State GIS Clearinghouse Operated by the New York State Office for Technology. Provides access to the New York State GIS Metadata and Data Repository.