| 1 | Arroyo Grande city (east) | 7,831 |
| 2 | California Polytechnic State University CDP (north-northeast 1) | 7,246 |
| 3 | Grover Beach city (east-southeast) | 7,066 |
| 4 | Edna CDP (southeast) | 6,358 |
| 5 | San Simeon CDP (south) | 6,345 |
| 6 | Santa Margarita CDP (northwest) | 6,198 |
| 7 | Creston CDP (south-southwest) | 6,185 |
| 8 | San Simeon CDP (southeast) | 6,139 |
| 9 | Shandon CDP (west-southwest 1) | 6,081 |
| 10 | Santa Margarita CDP (southeast) | 5,954 |
| 11 | Creston CDP (west) | 5,928 |
| 12 | Los Berros CDP (south-southeast) | 5,846 |
| 13 | Shandon CDP (west) | 5,839 |
| 14 | Nipomo CDP | 5,784 |
| 15 | El Paso de Robles (Paso Robles) city (south-southwest) | 5,568 |
| 16 | Creston CDP (east) | 5,529 |
| 17 | Grover Beach city (west-northwest) | 5,413 |
| 18 | San Miguel CDP (west) | 5,411 |
| 19 | Woodlands CDP (southwest) | 5,124 |
| 20 | San Luis Obispo city (east) | 4,811 |
| 21 | Edna CDP (west-northwest 2) | 4,806 |
| 22 | Los Osos CDP (northwest) | 4,731 |
| 23 | Creston CDP (west-northwest) | 4,661 |
| 24 | Grover Beach city (northeast) | 4,622 |
| 25 | Templeton CDP | 4,614 |
| 26 | California Polytechnic State University CDP (east-southeast) | 4,596 |
| 27 | California Polytechnic State University CDP (west-northwest) | 4,585 |
| 28 | Oak Shores CDP | 4,465 |
| 29 | California Polytechnic State University CDP (southwest) | 4,371 |
| 30 | Avila Beach CDP (west) | 4,288 |
| 31 | San Simeon CDP (northeast) | 4,165 |
| 32 | Edna CDP (south-southwest) | 4,129 |
| 33 | San Luis Obispo city (northwest) | 4,113 |
| 34 | Cambria CDP | 4,065 |
| 35 | San Simeon CDP (south-southeast 1) | 3,998 |
| 36 | Woodlands CDP (southeast) | 3,997 |
| 37 | El Paso de Robles (Paso Robles) city (northeast) | 3,988 |
| 38 | Shandon CDP (east-southeast) | 3,874 |
| 39 | Los Osos CDP (southeast) | 3,818 |
| 40 | San Luis Obispo city (west) | 3,720 |
| 41 | San Luis Obispo city (south-southwest) | 3,457 |
| 42 | Shandon CDP (west-southwest 2) | 3,388 |
| 43 | Oceano CDP | 3,333 |
| 44 | Morro Bay city (east-southeast) | 3,328 |
| 45 | California Polytechnic State University CDP (southeast) | 3,301 |
| 46 | Pismo Beach city (southeast) | 3,297 |
| 47 | Woodlands CDP (northwest) | 3,215 |
| 48 | Avila Beach CDP (southeast) | 3,212 |
| 49 | El Paso de Robles (Paso Robles) city (northwest) | 3,174 |
| 50 | San Miguel CDP (east-northeast) | 3,167 |
| 51 | Los Berros CDP (north-northwest) | 3,055 |
| 52 | El Paso de Robles (Paso Robles) city (west-southwest) | 3,052 |
| 53 | Shandon CDP (north-northeast) | 2,954 |
| 54 | Woodlands CDP (east-southeast) | 2,942 |
| 55 | California Polytechnic State University CDP (north-northeast 2) | 2,692 |
| 56 | Edna CDP (west-northwest 1) | 2,687 |
| 57 | Grover Beach city (south) | 2,649 |
| 58 | Cayucos CDP | 2,517 |
| 59 | San Simeon CDP (northwest 2) | 2,468 |
| 60 | Morro Bay city (west-northwest) | 2,229 |
| 61 | San Luis Obispo city (south) | 2,092 |
| 62 | Arroyo Grande city (west) | 2,015 |
| 63 | San Simeon CDP (northwest 1) | 1,973 |
| 64 | Avila Beach CDP (north-northeast) | 1,804 |
| 65 | San Miguel CDP (east-southeast) | 1,747 |
| 66 | Atascadero city | 1,534 |
| 67 | Grover Beach city (north-northwest) | 1,515 |
| 68 | San Simeon CDP (south-southeast 2) | 1,469 |
| 69 | Edna CDP (east) | 958 |