| If your library card begins with: | Jurisdiction | Branches |
| 29041 | San Mateo County Library | Atherton Belmont Brisbane East Palo Alto Foster City Half Moon Bay Millbrae Pacifica Portola Valley San Carlos Sanchez Woodside |
| 29042 | Burlingame Library | Burlingame Easton |
| 29043 | Daly City Library | Serramonte Bayshore John Daly Westlake |
| 29044 | Menlo Park Library | Menlo Park Belle Haven |
| 29045 | Redwood City Library | Redwood City Fair Oaks Schaberg Redwood Shores |
| 29046 | San Bruno Library | San Bruno |
| 29047 | San Mateo City Library | San Mateo City Hillsdale Marina |
| 29048 | South San Francisco Library | South San Francisco Main Grand Avenue |