Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| John Reed Elementary School | School | 31 | Sonoma | 38 20 28 N | 122 42 25 W |
| Jones Beach Camp | Locale | 31 | Mendocino | 39 57 12 N | 123 58 18 W |
| Joslyn Park | Park | 31 | Los Angeles | 34 00 29 N | 118 28 51 W |
| Kaiser Hospital | Hospital | 31 | Santa Clara | 37 20 28 N | 121 58 43 W |
| Karl Rosario Park | Park | 31 | Sacramento | 38 40 28 N | 121 22 36 W |
| Kingdom Hall of Jehovahs Witnesses | Church | 31 | Los Angeles | 33 56 37 N | 118 12 52 W |
| Kingdom Hall of Jehovahs Witnesses | Church | 31 | Sonoma | 38 23 42 N | 122 49 10 W |
| Kingdom Hall of Jehovahs Witnesses | Church | 31 | Stanislaus | 37 29 22 N | 120 50 37 W |
| Kings Daughters Nursing Home | Building | 31 | Alameda | 37 49 38 N | 122 15 24 W |
| KKHJ-AM (Los Angeles) | Tower | 31 | Los Angeles | 34 02 26 N | 118 22 21 W |
| Kohler Park | Park | 31 | Sacramento | 38 40 48 N | 121 21 56 W |
| KOMY-AM (Watsonville) | Tower | 31 | Santa Cruz | 36 55 50 N | 121 46 04 W |
| La Honda Elementary School | School | 31 | Santa Barbara | 34 39 27 N | 120 27 00 W |
| La Jolla | Populated Place | 31 | San Diego | 32 50 50 N | 117 16 27 W |
| La Jolla Hospital (historical) | Hospital | 31 | San Diego | 32 49 25 N | 117 16 29 W |
| La Jolla Presbyterian Church | Church | 31 | San Diego | 32 50 36 N | 117 16 37 W |
| La Loma Junior High School | School | 31 | Stanislaus | 37 38 40 N | 120 58 03 W |
| Lachryma Montis | Building | 31 | Sonoma | 38 17 56 N | 122 27 45 W |
| Lander Marketplace Shopping Center | Locale | 31 | Stanislaus | 37 28 44 N | 120 50 59 W |
| Lateral Four West | Canal | 31 | San Joaquin | 37 41 00 N | 121 22 43 W |
| Lawrence Links Golf Course | Locale | 31 | Sacramento | 38 42 35 N | 121 22 51 W |
| Leroy L Doig Intermediate School | School | 31 | Orange | 33 45 58 N | 117 54 23 W |
| Liberty Street Historic District | Park | 31 | San Francisco | 37 45 27 N | 122 25 24 W |
| Lighthouse Foursquare Gospel Church | Church | 31 | Mendocino | 39 26 48 N | 123 48 01 W |
| Lockeford | Populated Place | 31 | San Joaquin | 38 09 49 N | 121 08 60 W |
| Lockeford Community Center | Building | 31 | San Joaquin | 38 09 40 N | 121 08 60 W |
| Lockeford Elementary School | School | 31 | San Joaquin | 38 09 41 N | 121 08 55 W |
| Lockeford Post Office | Post Office | 31 | San Joaquin | 38 09 46 N | 121 09 05 W |
| Logandale | Populated Place | 31 | Glenn | 39 26 14 N | 122 11 31 W |
| Lompoc Grade School (historical) | School | 31 | Santa Barbara | 34 38 33 N | 120 27 32 W |