Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Romero Creek | Stream | | Santa Barbara | 34 25 09 N | 119 37 15 W |
| Romero Overlook | Locale | 186 | Merced | 37 04 50 N | 121 05 53 W |
| Romero Reservoir | Reservoir | 168 | Santa Barbara | 34 26 48 N | 119 35 53 W |
| Romero Saddle | Gap | 931 | Santa Barbara | 34 28 34 N | 119 35 43 W |
| Romero Saddle Guard Station (historical) | Locale | 918 | Santa Barbara | 34 28 33 N | 119 35 43 W |
| Romero School | School | 49 | Merced | 37 05 47 N | 121 01 15 W |
| Romero School | School | 43 | Merced | 37 07 49 N | 121 00 52 W |
| Romero Trail | Trail | 703 | Santa Barbara | 34 29 06 N | 119 35 17 W |
| Romero Visitors Center | Building | 189 | Merced | 37 04 51 N | 121 05 52 W |
| Romoland | Populated Place | 440 | Riverside | 33 44 45 N | 117 10 30 W |
| Romoland Elementary School | School | 442 | Riverside | 33 44 45 N | 117 10 16 W |
| Romoland Post Office | Post Office | 437 | Riverside | 33 44 57 N | 117 10 51 W |
| Romona Mine | Mine | 1322 | San Bernardino | 35 25 26 N | 115 48 28 W |
| Romstock Canyon | Valley | | Lassen | 40 32 46 N | 120 40 29 W |
| Ronald E McNair Elementary School | School | 27 | Los Angeles | 33 54 56 N | 118 14 56 W |
| Ronald McNair Intermediate School | School | 3 | San Mateo | 37 27 44 N | 122 07 51 W |
| Ronald Reagan Building | Building | 86 | Los Angeles | 34 03 01 N | 118 14 52 W |
| Ronald Reagan Elementary School | School | 113 | Kern | 35 20 47 N | 119 07 21 W |
| Ronald Reagan Presidential Library and Museum | Building | 362 | Ventura | 34 15 35 N | 118 49 11 W |
| Ronald W Reagan Federal Courthouse | Building | 35 | Orange | 33 44 53 N | 117 52 19 W |
| Ronda (historical) | Populated Place | 18 | Yolo | 38 46 41 N | 121 51 36 W |
| Rone Hospital (historical) | Hospital | 54 | Sonoma | 38 26 33 N | 122 42 07 W |
| Roney Corral | Locale | 1803 | Lassen | 40 30 51 N | 120 51 27 W |
| Roney Flat | Flat | 1489 | Modoc | 41 18 33 N | 120 56 17 W |
| Roof Spring | Spring | 431 | Kings | 35 54 47 N | 120 08 41 W |
| Rooftop Alternative Elementary School | School | 168 | San Francisco | 37 45 18 N | 122 26 37 W |
| Roop Fort (historical) | Military (Historical) | 1279 | Lassen | 40 25 07 N | 120 39 21 W |
| Roop Mountain | Summit | 2319 | Lassen | 40 28 13 N | 120 48 41 W |
| Roos Building | Building | 328 | Amador | 38 28 52 N | 120 50 47 W |
| Roos Club | Locale | 2 | Solano | 38 10 02 N | 122 04 50 W |
| Roos Cut | Canal | 1 | Solano | 38 09 45 N | 122 04 36 W |
| Roosevelt | Populated Place | 15 | Los Angeles | 33 51 53 N | 118 18 13 W |
| Roosevelt | Populated Place | 727 | Los Angeles | 34 43 10 N | 118 00 20 W |
| Roosevelt Avenue Baptist Church | Church | 7 | San Diego | 32 40 13 N | 117 06 20 W |
| Roosevelt Creek | Stream | | Monterey | 36 07 25 N | 121 28 14 W |
| Roosevelt Cut | Canal | 0 | Contra Costa | 38 01 06 N | 121 36 13 W |
| Roosevelt Elementary School | School | 22 | Alameda | 37 44 09 N | 122 08 47 W |
| Roosevelt Elementary School | School | 91 | Fresno | 36 30 43 N | 119 33 25 W |
| Roosevelt Elementary School | School | 82 | Fresno | 36 46 25 N | 119 55 29 W |
| Roosevelt Elementary School | School | 287 | Kern | 35 08 53 N | 119 27 36 W |
| Roosevelt Elementary School | School | 120 | Kern | 35 21 23 N | 119 01 40 W |
| Roosevelt Elementary School | School | 75 | Kings | 36 19 07 N | 119 39 29 W |
| Roosevelt Elementary School | School | 119 | Los Angeles | 34 05 50 N | 118 05 04 W |
| Roosevelt Elementary School | School | 175 | Los Angeles | 34 09 58 N | 118 20 41 W |
| Roosevelt Elementary School | School | 54 | Los Angeles | 34 01 44 N | 118 30 04 W |
| Roosevelt Elementary School | School | 22 | Los Angeles | 33 54 02 N | 118 12 11 W |
| Roosevelt Elementary School | School | 26 | Los Angeles | 33 54 46 N | 118 09 19 W |
| Roosevelt Elementary School | School | 29 | Los Angeles | 33 56 04 N | 118 12 02 W |
| Roosevelt Elementary School | School | 264 | Los Angeles | 34 03 55 N | 117 45 43 W |
| Roosevelt Elementary School | School | 11 | Los Angeles | 33 47 11 N | 118 11 11 W |
| Roosevelt Elementary School | School | 16 | Monterey | 36 40 32 N | 121 39 40 W |
| Roosevelt Elementary School | School | 356 | San Bernardino | 34 07 40 N | 117 18 42 W |
| Roosevelt Elementary School | School | 10 | San Joaquin | 37 57 17 N | 121 14 26 W |
| Roosevelt Elementary School | School | 20 | San Mateo | 37 28 00 N | 122 14 37 W |
| Roosevelt Elementary School | School | 84 | Santa Barbara | 34 26 10 N | 119 42 35 W |
| Roosevelt Elementary School | School | 104 | Tulare | 36 33 47 N | 119 23 47 W |
| Roosevelt Elementary School | School | 86 | Tulare | 36 12 07 N | 119 21 41 W |
| Roosevelt High School | School | 93 | Fresno | 36 44 32 N | 119 45 13 W |
| Roosevelt Junior High School | School | 33 | Alameda | 37 47 24 N | 122 14 13 W |
| Roosevelt Junior High School | School | 305 | San Bernardino | 34 04 07 N | 117 20 00 W |
| Roosevelt Junior High School | School | 91 | San Diego | 32 44 25 N | 117 09 01 W |
| Roosevelt Junior High School | School | 28 | Santa Clara | 37 20 48 N | 121 52 23 W |
| Roosevelt Junior High School | School | 27 | Stanislaus | 37 39 48 N | 121 00 22 W |
| Roosevelt Lake | Lake | 2210 | Mono | 38 17 45 N | 119 32 31 W |
| Roosevelt Lake | Lake | 3106 | Tuolumne | 37 58 21 N | 119 19 57 W |
| Roosevelt Memorial Park | Cemetery | 14 | Los Angeles | 33 51 52 N | 118 17 44 W |
| Roosevelt Middle School | School | 20 | Los Angeles | 33 53 17 N | 118 12 36 W |
| Roosevelt Middle School | School | 60 | San Diego | 33 14 17 N | 117 17 00 W |
| Roosevelt Middle School | School | 64 | San Francisco | 37 46 56 N | 122 27 32 W |
| Roosevelt Mine | Mine | 261 | Riverside | 33 30 15 N | 114 49 41 W |
| Roosevelt Mine | Mine | 1346 | San Diego | 33 04 58 N | 116 35 53 W |
| Roosevelt Municipal Golf Course | Locale | 243 | Los Angeles | 34 07 09 N | 118 17 29 W |
| Roosevelt Park | Park | 45 | Los Angeles | 33 58 12 N | 118 14 31 W |
| Roosevelt Park | Park | 6 | Sacramento | 38 34 25 N | 121 29 47 W |
| Roosevelt Park | Park | 28 | Stanislaus | 37 39 54 N | 121 00 14 W |
| Roosevelt Park | Park | 103 | Tulare | 36 32 37 N | 119 22 51 W |
| Roosevelt Playground | Park | 22 | Alameda | 37 44 07 N | 122 08 50 W |
| Roosevelt School | School | 95 | Fresno | 36 34 36 N | 119 36 30 W |
| Roosevelt School | School | 1298 | Lassen | 40 24 32 N | 120 39 55 W |
| Roosevelt School | School | 728 | Los Angeles | 34 43 08 N | 118 00 30 W |
| Roosevelt School | School | 268 | Los Angeles | 34 09 02 N | 118 09 27 W |
| Roosevelt School | School | 237 | Los Angeles | 34 07 53 N | 117 51 35 W |
| Roosevelt School | School | 36 | Orange | 33 44 43 N | 117 51 51 W |
| Roosevelt School | School | -4 | Riverside | 33 42 52 N | 116 13 00 W |
| Roosevelt School (historical) | School | -56 | Imperial | 33 06 17 N | 115 48 03 W |
| Roosevelt Senior High School | School | 95 | Los Angeles | 34 02 17 N | 118 12 37 W |
| Roosevelt Shopping Center | Locale | 27 | Stanislaus | 37 39 52 N | 121 00 27 W |
| Rooster Canyon | Valley | | Monterey | 36 34 51 N | 121 20 28 W |
| Rooster Comb | Ridge | 1704 | Shasta | 40 37 01 N | 121 42 44 W |
| Rooster Comb | Ridge | 539 | Stanislaus | 37 14 36 N | 121 21 28 W |
| Rooster Rock | Pillar | 1384 | Humboldt | 40 44 27 N | 123 45 10 W |
| Root Cabin | Locale | 1093 | El Dorado | 39 00 25 N | 120 38 32 W |
| Root Creek | Stream | | Humboldt | 40 28 33 N | 123 57 06 W |
| Root Creek | Stream | | Lake | 39 13 15 N | 122 43 41 W |
| Root Creek | Stream | | Madera | 36 53 52 N | 119 55 45 W |
| Root Creek | Stream | | Shasta | 41 08 58 N | 122 22 50 W |
| Root Creek | Stream | | Shasta | 41 09 46 N | 122 17 43 W |
| Root Creek Trail | Trail | 832 | Shasta | 41 09 55 N | 122 18 47 W |
| Root Glades | Flat | 1075 | Lake | 39 13 56 N | 122 42 48 W |
| Root Hog Mine | Mine | 1425 | Placer | 39 07 16 N | 120 36 24 W |
| Root Lateral | Canal | 48 | Stanislaus | 37 46 42 N | 120 54 52 W |
| Root Park | Park | 10 | Alameda | 37 43 37 N | 122 09 28 W |
| Root Spring | Spring | 1911 | Riverside | 33 40 13 N | 116 34 09 W |
| Root Spring | Spring | 544 | Tehama | 39 55 32 N | 121 47 05 W |
| Ropers Slough | Gut | 1 | Humboldt | 40 38 10 N | 124 16 07 W |
| Ropi Lake | Lake | 2322 | El Dorado | 38 50 22 N | 120 07 49 W |
| Roque Campground | Locale | 891 | Santa Barbara | 34 58 45 N | 120 00 53 W |
| Roque Canyon | Valley | | Santa Barbara | 34 58 08 N | 120 03 14 W |
| Rorimer Elementary School | School | 134 | Los Angeles | 34 00 21 N | 117 53 39 W |
| Rosa De Saron Assembly of God Church | Church | 89 | Fresno | 36 42 43 N | 119 45 45 W |