23 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 93446 | Paso Robles | 45,859 |
| 93422 | Atascadero | 33,512 |
| 93420 | Arroyo Grande | 32,016 |
| 93401 | San Luis Obispo | 29,995 |
| 93405 | San Luis Obispo | 23,856 |
| 93444 | Nipomo | 21,495 |
| 93402 | Los Osos | 15,085 |
| 93433 | Grover Beach | 12,684 |
| 93442 | Morro Bay | 11,336 |
| 93465 | Templeton | 10,248 |
| 93449 | Pismo Beach | 8,024 |
| 93410 | San Luis Obispo | 7,038 |
| 93445 | Oceano | 6,812 |
| 93428 | Cambria | 6,269 |
| 93430 | Cayucos | 3,257 |
| 93409 | San Luis Obispo | 2,687 |
| 93453 | Santa Margarita | 2,003 |
| 93461 | Shandon | 1,353 |
| 93432 | Creston | 1,229 |
| 93424 | Avila Beach | 1,026 |
| 93407 | San Luis Obispo | 348 |
| 93452 | San Simeon | 301 |
| 93408 | San Luis Obispo | 8 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 23 ZCTAs in San Luis Obispo County, California (US Census).