San Mateo County Libraries
The San Mateo County Libraries, formerly San Mateo County Library, is a public library system and Joint Powers Authority headquartered in San Mateo, California. Its motto is "Open for Exploration".
It is a member of the Peninsula Library System.
Locations
The following locations are a part of the system:| Branch | Street Address | City | ZIP | Telephone | Image |
| Atherton | 2 Dinkelspiel Station Lane | Atherton | 94027 | 328‑2422 | |
| Belmont | 1110 Alameda de las Pulgas | Belmont | 94002 | 591‑8286 | |
| Bookmobile | 620 Correas Street | Half Moon Bay | 94019 | 726‑2316 | |
| Brisbane | 250 Visitacion Avenue | Brisbane | 94005 | 467‑2060 | |
| East Palo Alto | 2415 University Avenue | East Palo Alto | 94303 | 321‑7712 | |
| Foster City | 1000 East Hillsdale Boulevard | Foster City | 94404 | 574‑4842 | |
| Half Moon Bay | 620 Correas Street | Half Moon Bay | 94019 | 726‑2316 | |
| Millbrae | 1 Library Avenue | Millbrae | 94030 | 697‑7607 | |
| Pacifica Sanchez | 1111 Terra Nova Boulevard | Pacifica | 94044 | 359-3397 | |
| Pacifica Sharp Park | 104 Hilton Way | Pacifica | 94044 | 355‑5196 | |
| Portola Valley | 765 Portola Road | Portola Valley | 94028 | 851‑0560 | |
| San Carlos | 610 Elm Street | San Carlos | 94070 | 591‑0341 | |
| Woodside | 3140 Woodside Road | Woodside | 94062 | 851‑0147 |
The bookmobile service travels around the county to various locations like schools, post offices, and even the Hiller Aviation Museum.