Alaska

Alaska Mapper
Alaska Open Data Geoportal
Realty and Natural Resources (US Fish and Wildlife Service)
Alaska Land Records

Alaska State Boroughs

Fairbanks North Star Borough GIS
Haines Borough GIS
Kenai Peninsula Borough
North Slope Borough

California

California State GeoPortal

California State Coastal Counties

Contra Costa County GIS
Humboldt County GIS Portal
Los Angeles County Enterprise GIS and GIS Net (LA)
Marin County GIS
Monterey County GIS
Orange County GIS
San Diego County GIS
San Francisco County GIS
San Luis Obispo County GIS
Santa Barbara County GIS
Santa Cruz County GIS
Solano County GIS
Ventura Count GIS

Hawaii and Pacific Islands

Hawaii Statewide GIS Program
U.S. Fish & Wildlife Service Hawaii and Pacific Islands Spatial Data Sets
Hawaii Data Clearinghouse

Hawaii Counties

County of Hawaii GIS Data Links
County of Honolulu GIS
County of Kauai GIS
Maui County GIS

American Samoa

American Samoa GIS
Fagatele Bay National Marine Sanctuary GIS Data

Guam

Guam GIS

Idaho

Idaho Geospatial Office

Oregon

Oregon Geospatial Enterprise Office (GEO)

Oregon State Coastal Counties

Clatsop County Maps – GIS
Curry County GIS
Douglas County GIS
Lane County GIS
Lincoln County Maps
Tillamook County GIS

Washington

Washington State Geospatial Data Archive (WAGDA)
Washington Dept. of Natural Resources GIS
Washington State Dept. of Ecology GIS
Washington Coastal Atlas

Washington State Coastal Counties

Clallam County Interactive Maps
Grays Harbor County GIS
Jefferson County Maps
Island County GIS
King County GIS Center
Kitsap County GIS
Mason County GIS
Pacific County Public Works GIS
Pierce County GIS Division
San Juan County GIS
Skagit County GIS
Snohomish County Cartographic Resources and Maps
Thurston County GeoData Center
Whatcom County GIS

Western Region

U.S. Pacific Coast and Western Region Internet Map Server sites (USGS)