• Dynamic Tract/Block Maps
  Search by address, zip code or latitude and longitude.



• PDF Maps
  Browse by area and use the index map (the first file - #000) for each area to find the relevant detailed maps. Typically 36" x 33" prints requiring drum plotters to print full size. Note: This is an ftp server, so you will be navigating a file directory.
  • County Tract/Block Maps
  • City Tract/Block Maps

• Demographic/Thematic Maps
  View a variety of demographic characteristics (e.g. age, race, sex, housing, income, etc.) by state, county, metropolitan area, 106th Congressional District and 3-digit zip code.

• TIGER database and TIGER/Line files
  

The following are compressed TIGER/Line files that have been converted to .shp files for use with ESRI's ArcView GIS software. See TIGER/Line Files Technical Documentation (pdf) for further information.

• Bay Area Regional Data -- not trimmed to Bay shore or Pacific Ocean
  • Counties (.zip) (129KB)
  • Cities and designated places (.zip) (947KB)
  • Census tracts (.zip) (1,867KB)
  • Block groups (.zip) (1,708KB)
  • Blocks (.zip) (9,175KB)
  • Travel analysis zones (.zip) (1,612KB)
  • Landmark polygons (.zip) (1,175KB)

• Bay Area Regional Data -- trimmed to Bay shore and Pacific Ocean
  • Counties (.zip) (237KB)
  • Cities and designated places (.zip) (1,018KB)
  • Census tracts (.zip) (2,037KB)
  • Block groups (.zip) (1,766KB)
  • Blocks (.zip) (8,726KB)
  • Travel analysis zones (.zip) (1,656KB)

• Bay Area County Data (ALL TIGER LAYERS) -- not trimmed to Bay shore and Pacific Ocean
  • Alameda County (.zip) (17,240KB)
  • Contra Costa County (.zip) (15,259KB)
  • Marin County (.zip) (7,974KB)
  • Napa County (.zip) (3,325KB)
  • San Francisco County (.zip) (3,775KB)
  • San Mateo County (.zip) (11,359KB)
  • Santa Clara County (.zip) (21,668KB)
  • Solano County (.zip) (10,027 KB)
  • Sonoma County (.zip) (20,004KB)

• Bay Area Public Use Microdata Areas (PUMAs)
  • 1990 PUMAs, 5% PUMAs, > 100,000 total population (.zip) (805KB)
  • 2000 PUMAs (PROPOSED), 5% PUMAs, > 100,000 total population (.zip) (496KB)

• GreenInfo Network
  A public interest GIS organization based in San Francisco.



• GIS Data for Northern California
  A well-maintained site of links to GIS data and data providers in Northern California.

• Glossary of Geographic Terms
  From the U.S. Census Bureau



• TIGER
  U.S. Census Bureau's Topologically Integrated Geographic Encoding and Reference system.



• Bay Area Automated Mapping Association (BAAMA)
  The Northern California chapter of the Urban and Regional Information Systems Association (URISA).



• Digital Atlas of the San Francisco Bay Area
  A public education project of Geography professor Bill Bowen at California State University, Northridge.