CGS Library

Interior view of the CGS Library

CGS Library normal ​hours of operation:

Monday, Tuesday, Wednesday, and Thursday.
9:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:00 p.m.
​The Library is closed on Fridays.

To browse our catalog online, click here.

For information about how to order CGS publications, please click here.

Library or reference questions: 916-327-1850 

801 K Street, 14th Floor (or MS 14-34 for address)
Sacramento, CA 95814-3532

Under several different names, the California Geological Survey Library has been in existence since 1880 and has developed into an extensive collection of scientific and technical materials on Earthquakes, Engineering Geology, Environmental Geology, Geology of California, Geomorphology, Groundwater, Hydrogeology, Landslides, Mapping, Mined Land Reclamation, Mineral Resources, Mining, Seismology, Soil Mineralogy, Structural Geology, Tectonics, Water Resources and Volcanology.

The Library has over 100,000 books and reports, including CGS ​publications, various map collections, photographs, U.S. Geological Survey publications and periodicals.

The Library is open to the public for reference and research. Materials may be borrowed through interlibrary loan only.

The Library is a designated State Earth Science Information Center (ESIC), under an ag​reement with the U.S. Geological Survey, tasked to respond to requests for earth science information.

CGS publications are also available for reference at our Bay Area and Los Angeles offices. All of our publications, including those no longer available for purchase, may be viewed at the following libraries: 

  • California State Library
  • California State Universities, Chico, Long Beach, San Diego 
  • Fresno County Public Library
  • Los Angeles Public Library
  • San Diego Public Library
  • San Francisco Public Library
  • Stanford University
  • University of California, Berkeley, Davis, Los Angeles, San Diego and Santa Barbara.