States
- Association of American State Geologists
Well-maintained list of links to available state geological survey sites - Illinois State Geological Survey
USGS
International Geological Surveys
- Directory of Geoscience Organizations of the World 1999
This site gives postal addresses, telephone numbers, email and web links (when available) for most countries. Includes other geological sciences bureaus and organizations as well as surveys. Maintained by the Geological Survey of Japan.