- Hayward Area Historical Society The society's library includes materials on San Lorenzo and other areas neighboring Hayward.
- Oakland Library History Room The Oakland History Room at the main library contains an extensive collection of materials on East Bay history. The website has a searchable catalog of the collecton.
- San Leandro Library History Room The library's collection of historic photographs has been digitized and is available for viewing from your own computer.
- San Lorenzo Library The oldest library in Alameda County, it has a strong collection in local history and genealogy.
- De Anza College California History Center (Cupertino) The Center has an extensive library, publishes books, hosts exhibitions, and assists in research. It covers all of California but particularly the South Bay Area.