Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Pit Number Three Dam | Dam | 825 | Shasta | 41 01 18 N | 121 40 33 W |
| Pit Six Dam | Dam | 411 | Shasta | 40 55 24 N | 121 59 36 W |
| Pleasant Valley 6-045 Dam | Dam | 1323 | Inyo | 37 24 48 N | 118 31 15 W |
| Plum Canyon 139 Dam | Dam | 1531 | Modoc | 41 26 30 N | 120 22 22 W |
| Poe Dam | Dam | 425 | Butte | 39 48 35 N | 121 25 55 W |
| Poison Springs 1113 Dam | Dam | 1597 | Modoc | 41 49 05 N | 120 01 32 W |
| Pomponio Ranch 1601 Dam | Dam | 176 | San Mateo | 37 17 24 N | 122 18 46 W |
| Pond Number 2 1050-002 Dam | Dam | 33 | Sonoma | 38 26 30 N | 122 45 16 W |
| Ponderosa Diversion Dam | Dam | 293 | Butte | 39 32 56 N | 121 18 16 W |
| Pondosa Dam | Dam | 1294 | Siskiyou | 41 11 09 N | 121 44 28 W |
| Poore Lake Reservoir 540 Dam | Dam | 2201 | Mono | 38 18 54 N | 119 31 22 W |
| Port Costa 1580 Dam | Dam | 22 | Contra Costa | 38 02 36 N | 122 11 22 W |
| Portal Powerhouse Forebay 104-024 Dam | Dam | 2189 | Fresno | 37 19 06 N | 119 04 15 W |
| Porter Estate 775 Dam | Dam | 322 | Los Angeles | 34 15 48 N | 118 33 51 W |
| Portola 2013-002 Dam | Dam | 319 | Orange | 33 38 00 N | 117 34 33 W |
| Potrero 786 Dam | Dam | 262 | Los Angeles | 34 08 06 N | 118 49 27 W |
| Poway 1078 Dam | Dam | 285 | San Diego | 33 00 36 N | 117 00 39 W |
| Prado Dam | Dam | 167 | Riverside | 33 53 25 N | 117 38 27 W |
| Prenda 1003-004 Dam | Dam | 373 | Riverside | 33 54 36 N | 117 22 15 W |
| Preston 1-022 Dam | Dam | 109 | Amador | 38 22 10 N | 120 56 14 W |
| Priest 9-006 Dam | Dam | 683 | Tuolumne | 37 48 02 N | 120 16 01 W |
| Proctor Creek Dam | Dam | 1234 | Shasta | 40 52 30 N | 121 23 34 W |
| Prosser Creek Dam | Dam | 1751 | Nevada | 39 22 45 N | 120 08 24 W |
| Pruett 184 Dam | Dam | 877 | Siskiyou | 41 40 24 N | 122 37 16 W |
| Puddingstone 32-009 Dam | Dam | 287 | Los Angeles | 34 05 25 N | 117 48 31 W |
| Puddingstone Diversion 32-016 Dam | Dam | 354 | Los Angeles | 34 07 54 N | 117 46 57 W |
| Puddingstone Diversion Dam | Dam | 354 | Los Angeles | 34 07 50 N | 117 46 58 W |
| Puglizevich Dam | Dam | 51 | Merced | 37 15 47 N | 120 27 32 W |
| Pulgas Lake Dam | Dam | 119 | San Diego | 33 20 37 N | 117 26 20 W |
| Putah Diversion Dam | Dam | 44 | Yolo | 38 29 36 N | 122 00 16 W |
| Putts Lake 311-004 Dam | Dam | 1634 | Placer | 39 17 18 N | 120 41 22 W |
| Pyramid 1-066 Dam | Dam | 787 | Los Angeles | 34 38 42 N | 118 45 51 W |
| Quail Lake 326 Dam | Dam | 2095 | Placer | 39 04 18 N | 120 09 52 W |
| Quail Valley 829 Dam | Dam | 452 | Riverside | 33 41 54 N | 117 15 09 W |
| Quartz 2019 Dam | Dam | 416 | Tuolumne | 37 56 00 N | 120 26 04 W |
| R N Flower 507 Dam | Dam | 269 | Calaveras | 37 58 06 N | 120 40 58 W |
| R Simoni Irrigation 1622 Dam | Dam | 182 | Santa Clara | 37 05 12 N | 121 42 28 W |
| Railroad Canyon 818 Dam | Dam | 415 | Riverside | 33 40 33 N | 117 16 23 W |
| Ralston Lake 1-059 Dam | Dam | 2382 | El Dorado | 38 50 36 N | 120 05 52 W |
| Rancho Cielito 808 Dam | Dam | 194 | San Bernardino | 33 58 36 N | 117 42 33 W |
| Rancho Del Ciervo 752 Dam | Dam | 113 | Santa Barbara | 34 28 30 N | 119 49 16 W |
| Rancho La Jota 2414 Dam | Dam | 524 | Napa | 38 33 22 N | 122 25 25 W |
| Rancho Seco 1009-013 Dam | Dam | 77 | Sacramento | 38 20 06 N | 121 06 04 W |
| Rattlesnake Canyon 1029-003 Dam | Dam | 124 | Orange | 33 43 42 N | 117 44 33 W |
| Ray Soule Reservoir 182 Dam | Dam | 873 | Siskiyou | 41 43 54 N | 122 22 22 W |
| Reba 519 Dam | Dam | 2197 | Alpine | 38 28 18 N | 120 02 40 W |
| Reclamation Dam Edwards Air Base | Dam | 978 | Los Angeles | 34 56 24 N | 117 41 03 W |
| Rector Creek 1-0 1 Dam | Dam | 119 | Napa | 38 26 32 N | 122 20 44 W |
| Red Bluff Diversion Dam | Dam | 78 | Tehama | 40 09 12 N | 122 12 10 W |
| Red Lake 413-002 Dam | Dam | 572 | Napa | 38 35 25 N | 122 27 41 W |
| Red Lake 511-003 Dam | Dam | 2397 | Alpine | 38 41 60 N | 119 58 10 W |
| Red Mountain Reservoir 37-000 Dam | Dam | 336 | San Diego | 33 23 48 N | 117 11 09 W |
| Red Rock Number 1 230 Dam | Dam | 1748 | Lassen | 40 58 06 N | 120 08 16 W |
| Red Rock Number 3 230-003 Dam | Dam | 1640 | Lassen | 40 55 12 N | 120 10 28 W |
| Red Star Dam (historical) | Dam | 1536 | Placer | 39 06 42 N | 120 28 26 W |
| Redbank 1017 Dam | Dam | 124 | Fresno | 36 48 36 N | 119 34 51 W |
| Rees Jones 361 Dam | Dam | 461 | Colusa | 39 11 48 N | 122 25 10 W |
| Refvem Number 1 3421 Dam | Dam | 97 | Sonoma | 38 33 48 N | 122 47 34 W |
| Reid 1492 Dam | Dam | 849 | Calaveras | 38 17 54 N | 120 27 04 W |
| Relief 97-080 Dam | Dam | 2204 | Tuolumne | 38 16 52 N | 119 44 01 W |
| Renner Sibley Creek 1119 Dam | Dam | 1518 | Modoc | 41 59 18 N | 120 35 34 W |
| Reservation Levee | Dam | 45 | Imperial | 32 48 36 N | 114 31 22 W |
| Reservoir A 1086 Dam | Dam | 2127 | Placer | 39 15 30 N | 120 06 40 W |
| Reservoir Number 1 4-004 Dam | Dam | 276 | Los Angeles | 34 11 42 N | 118 17 57 W |
| Reservoir Number 4 4-006 Dam | Dam | 218 | Los Angeles | 34 11 06 N | 118 17 51 W |
| Reservoir Number 5 4-007 Dam | Dam | 271 | Los Angeles | 34 12 36 N | 118 19 51 W |
| Reynolds Weir 80 | Dam | 79 | Fresno | 36 26 06 N | 119 40 15 W |
| Rhinedollar 104-041 Dam | Dam | 2884 | Mono | 37 56 06 N | 119 13 58 W |
| Richardson 1429 Dam | Dam | 184 | Sonoma | 38 37 30 N | 123 11 10 W |
| Richardson 2428 Dam | Dam | 337 | Sonoma | 38 40 54 N | 123 22 22 W |
| Richfield Weir | Dam | 95 | Kern | 35 17 35 N | 119 17 00 W |
| Rickey 1603 Dam | Dam | 587 | San Mateo | 37 18 24 N | 122 10 28 W |
| Ridgewood 382 Dam | Dam | 390 | Mendocino | 39 19 18 N | 123 20 28 W |
| Righetti 743 Dam | Dam | 153 | San Luis Obispo | 35 14 48 N | 120 35 10 W |
| Rinconada Reservoir 72-010 Dam | Dam | 138 | Santa Clara | 37 15 18 N | 121 59 10 W |
| Riviera Reservoir 1043 Dam | Dam | 104 | Los Angeles | 34 03 00 N | 118 30 03 W |
| Robbs Peak 1009-006 Dam | Dam | 1576 | El Dorado | 38 56 54 N | 120 23 28 W |
| Robert A Skinner 35-012 Dam | Dam | 451 | Riverside | 33 35 12 N | 117 04 21 W |
| Robert L Matheson 1413 Dam | Dam | 312 | Napa | 38 30 48 N | 122 16 40 W |
| Robert W Matthews Dam | Dam | 821 | Trinity | 40 22 09 N | 123 25 56 W |
| Roberts 157-002 Dam | Dam | 1267 | Modoc | 41 13 51 N | 121 08 18 W |
| Rock Creek 465 Dam | Dam | 1000 | El Dorado | 38 56 17 N | 120 43 48 W |
| Rock Creek 97-043 Dam | Dam | 439 | Placer | 38 56 48 N | 121 05 28 W |
| Rock Creek Dam | Dam | 440 | Placer | 38 56 50 N | 121 05 25 W |
| Rock Creek Dam | Dam | 677 | Plumas | 39 59 14 N | 121 16 59 W |
| Rodden Lake 62-003 Dam | Dam | 75 | Stanislaus | 37 49 06 N | 120 45 55 W |
| Rogers Dam | Dam | 47 | Marin | 38 02 48 N | 122 47 10 W |
| Rollins 61-021 Dam | Dam | 662 | Nevada | 39 08 12 N | 120 57 04 W |
| Romero Canyon Creek Number 18 Debris Basin Dam | Dam | 170 | Santa Barbara | 34 26 42 N | 119 35 33 W |
| Rositas Dam | Dam | -22 | Imperial | 32 49 09 N | 115 26 11 W |
| Ross 99-003 Dam | Dam | 575 | Calaveras | 38 07 00 N | 120 30 58 W |
| Ross Number 1 1222 Dam | Dam | 191 | Shasta | 40 38 30 N | 122 18 52 W |
| Ross Number 2 1222-002 Dam | Dam | 189 | Shasta | 40 38 24 N | 122 18 28 W |
| Rossmoor Number 1 799 Dam | Dam | 104 | Orange | 33 37 06 N | 117 43 51 W |
| Round Lake 1-030 Dam | Dam | 2451 | El Dorado | 38 45 06 N | 120 00 22 W |
| Round Mountain 1382 Dam | Dam | 229 | Mendocino | 39 12 42 N | 123 13 46 W |
| Round Valley 228 Dam | Dam | 1623 | Lassen | 40 30 57 N | 120 39 41 W |
| Round Valley 97-009 Dam | Dam | 1717 | Butte | 40 04 18 N | 121 27 22 W |
| Rowena 6-018 Dam | Dam | 136 | Los Angeles | 34 06 36 N | 118 16 15 W |
| Rubicon 1009-009 Dam | Dam | 1989 | El Dorado | 38 59 20 N | 120 13 23 W |
| Rubio Diversion Debris 32-021 Dam | Dam | 486 | Los Angeles | 34 11 54 N | 118 07 21 W |
| Rucker Lake 97-044 Dam | Dam | 1666 | Nevada | 39 21 24 N | 120 39 28 W |
| Runkle 86-003 Dam | Dam | 347 | Ventura | 34 14 36 N | 118 43 51 W |
| Rush Creek Meadow 104-034 Dam | Dam | 2873 | Mono | 37 45 06 N | 119 10 52 W |
| Russian River Number 1 1026 Dam | Dam | 3 | Sonoma | 38 28 60 N | 123 00 40 W |
| Rutherford Lake 1-036 Dam | Dam | 2968 | Madera | 37 35 54 N | 119 22 10 W |
| Rye 265-002 Dam | Dam | 343 | Tehama | 39 50 18 N | 122 31 22 W |
| Rye Grass Swale 150 Dam | Dam | 1356 | Modoc | 41 21 56 N | 120 38 58 W |
| Ryland Dam | Dam | 213 | Santa Clara | 37 09 50 N | 121 58 39 W |
| S X 112 Dam | Dam | 1465 | Modoc | 41 30 42 N | 120 44 52 W |