Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Arden Gold Sewage Treatment Plant | Locale | 49 | Sacramento | 38 39 15 N | 121 12 27 W |
| Arden Hills Christian Church | Church | 23 | Sacramento | 38 35 01 N | 121 21 41 W |
| Arden Middle School | School | 22 | Sacramento | 38 35 42 N | 121 22 56 W |
| Arden Morse Shopping Center | Locale | 17 | Sacramento | 38 35 40 N | 121 23 27 W |
| Arden Plaza Shopping Center | Locale | 22 | Sacramento | 38 35 48 N | 121 21 47 W |
| Arden Post Office | Post Office | 16 | Sacramento | 38 35 48 N | 121 23 52 W |
| Arden Square Shopping Center | Locale | 15 | Sacramento | 38 35 47 N | 121 23 49 W |
| Arden Town | Populated Place | 18 | Sacramento | 38 34 27 N | 121 22 59 W |
| Arden Town Shopping Center | Locale | 18 | Sacramento | 38 34 30 N | 121 22 55 W |
| Arden-Dimick Community Library | Building | 18 | Sacramento | 38 34 51 N | 121 22 60 W |
| Ardenwood Regional Preserve | Park | 7 | Alameda | 37 33 29 N | 122 02 53 W |
| Ardeth Lake | Lake | 2574 | Tuolumne | 38 03 03 N | 119 41 30 W |
| Ardilla Group Camp | Locale | 268 | Alameda | 37 34 47 N | 121 42 16 W |
| Ardis G Egan Intermediate School | School | 31 | Santa Clara | 37 23 46 N | 122 07 05 W |
| Ardmore Recreation Center | Park | 62 | Los Angeles | 34 03 15 N | 118 18 05 W |
| Area 1 Work Center Forest Service Facility | Locale | 461 | Los Angeles | 34 14 20 N | 117 51 47 W |
| Area 4 Work Center Fire Station | Building | 1133 | Los Angeles | 34 26 42 N | 117 51 08 W |
| Area of Modoc War Fortifications | Locale | 1306 | Modoc | 41 41 17 N | 121 24 04 W |
| Area of War Fortifications | Locale | 1296 | Modoc | 41 43 20 N | 121 24 23 W |
| Arena | Populated Place | 43 | Merced | 37 22 15 N | 120 40 35 W |
| Arena Canal | Canal | 39 | Merced | 37 22 29 N | 120 42 56 W |
| Arena Christian Center | Church | 7 | Sacramento | 38 38 38 N | 121 28 49 W |
| Arena Cove | Bay | -2 | Mendocino | 38 54 50 N | 123 42 48 W |
| Arena Cove Historic District | Park | 7 | Mendocino | 38 54 51 N | 123 42 32 W |
| Arena Elementary School | School | 67 | Mendocino | 38 54 45 N | 123 41 34 W |
| Arena High School | School | 33 | Los Angeles | 33 55 28 N | 118 24 44 W |
| Arena Rock | Island | -3 | Mendocino | 38 58 33 N | 123 44 56 W |
| Arena Rock Marine Natural Preserve | Park | 0 | Mendocino | 38 58 34 N | 123 44 44 W |
| Arena School (historical) | School | 45 | Merced | 37 22 27 N | 120 40 32 W |
| Arequipa Sanatorium | Hospital | 95 | Marin | 38 00 04 N | 122 36 42 W |