| Lake | County | Latitude | Longitude |
| Raccoon | Marin | 37.862376 | -122.437332 |
| Rae Lakes | Fresno | 36.801239 | -118.399003 |
| Rager Reservoir | Lassen | 40.975038 | -120.214253 |
| Railroad Reservoir | Lassen | 40.777727 | -121.149700 |
| Rainy Lake | Siskiyou | 41.560493 | -123.238691 |
| Raker and Thomas Res | Modoc | 41.635161 | -120.542204 |
| Raljon Lake | Kern | 35.708271 | -118.737272 |
| Ralston Lake | El Dorado | 38.841673 | -120.099517 |
| Ram Lake | Fresno | 37.530209 | -118.896788 |
| Ramer Lake | Imperial | 33.076668 | -115.512169 |
| Rancho Seco Reservoi | Sacramento | 38.336665 | -121.092566 |
| Ranger Lales | Tulare | 36.670656 | -118.688146 |
| Rattlesnake Lake | Del Norte | 41.700692 | -123.949440 |
| Rattlesnake Reservoi | Orange | 33.730118 | -117.737685 |
| Raymond Lake | Alpine | 38.609701 | -119.835086 |
| Red Can Lake | Tuolumne | 38.142959 | -119.753738 |
| Red Mountain Lake | Humboldt | 41.250561 | -123.691406 |
| Red Rock Lake | Lassen | 41.048464 | -120.211946 |
| Red Rock Lakes | Siskiyou | 41.827864 | -121.827894 |
| Redinger Lake | Fresno | 37.153722 | -119.421767 |
| Reese Reservoir | Shasta | 40.530202 | -122.462727 |
| Relief Reservoir | Tuolumne | 38.270474 | -119.738516 |
| Renner Lake | Modoc | 41.992391 | -120.620733 |
| Renner Sibley Reserv | Modoc | 41.983943 | -120.593663 |
| Reservoir C | Modoc | 41.660664 | -120.771477 |
| Reservoir F | Modoc | 41.569102 | -120.880089 |
| Reservoir G | Modoc | 41.717512 | -120.810935 |
| Rex Reservoir | Nevada | 39.207468 | -121.137636 |
| Reymann Lake | Mariposa | 37.819880 | -119.359869 |
| Rhodes Lake | Tuolumne | 38.369902 | -120.021241 |
| Richardson Lake | El Dorado | 39.022772 | -120.212142 |
| Ridenoure Reservoir | Lassen | 40.367837 | -120.652541 |
| Ridge Lake | Plumas | 40.413699 | -121.462705 |
| Rim Lake | Lassen | 40.492753 | -121.186335 |
| Ritter Lakes | Madera | 37.688878 | -119.209089 |
| Roberts Lake | Monterey | 36.607520 | -121.858298 |
| Robinson Lake | Inyo | 36.757606 | -118.340952 |
| Rock Island Lake | Tuolumne | 38.072405 | -119.473981 |
| Rockslide Lake | Tulare | 36.563379 | -118.454687 |
| Rocky Basin Lakes | Tulare | 36.445626 | -118.321751 |
| Rocky Bottom Lake | Inyo | 37.200098 | -118.516829 |
| Rodden Lake | Stanislaus | 37.828296 | -120.769040 |
| Rodgers Lake | Tuolumne | 37.994987 | -119.493491 |
| Rogers Lake | Plumas | 39.854495 | -121.221538 |
| Rollins Reservoir | Nevada | 39.155061 | -120.931942 |
| Ropi Lake | El Dorado | 38.839764 | -120.131302 |
| Rosalie Lake | Madera | 37.686884 | -119.122849 |
| Rosasco Lake | Tuolumne | 38.141098 | -119.818621 |
| Rose Lake | Fresno | 37.307477 | -118.884482 |
| Ross Lake | San Diego | 33.440893 | -117.283629 |
| Ross Resrvoir | Calaveras | 38.116946 | -120.513590 |
| Round Top Lake | Alpine | 38.667616 | -120.012861 |
| Royal Arch Lake | Madera | 37.577996 | -119.503471 |
| Royce Lakes | Fresno | 37.326507 | -118.765530 |
| RR Canyon Reservoir | Riverside | 33.697469 | -117.269296 |
| Rubicon Lake | El Dorado | 38.966617 | -120.133849 |
| Rubicon Reservoir | El Dorado | 38.984207 | -120.221063 |
| Ruby Lake | Madera | 37.721338 | -119.161182 |
| Rucker Lake | Nevada | 39.355497 | -120.652713 |
| Ruffy Lakes | Siskiyou | 41.386564 | -122.969151 |
| Russian Lake | Siskiyou | 41.261763 | -122.974955 |
| Ruth Lake | Madera | 37.576234 | -119.371921 |
| Ruth Reservoir | Trinity | 40.300742 | -123.350592 |
| Rutherford Lake | Madera | 37.597640 | -119.372143 |