| ZIP Codes: | 36 ZIP Codes (22 Standard, 12 PO Box, 2 Unique) [See All] |
| Area Codes: | 805 / 820 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 11:52:48 PM |
| Population: | 283,203 [See All] |
| FIPS: | 06079 |
| CBSA: | San Luis Obispo-Paso Robles, CA |
| Land Area: | 3,609 sq mi |
| Water Area: | 46 sq mi |
| Coordinates: | 35.3638, -120.6879 |
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283,203 residents live across 36 ZIPs covering 3,609 sq mi, served by 21 distinct USPS-recognized cities.
Population moved from 274,729 to 279,898 from 2014 to 2024 — a +1.9% change. 15 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 93432 (Creston, $146,938 median) and poorest ZIP 93405 (San Luis Obispo, $60,399) are 19.0 miles apart — a 2.4× income gap across local geography.
Median home values vary 2.2× across this county — from $458,400 in 93426 (Bradley) to $1,021,300 in 93449 (Pismo Beach).
Density varies 54773× across the county — from 3 people/sq mi in 93453 (Santa Margarita) to 151,557 in 93410 (San Luis Obispo).
Educational attainment ranges from 2.5% bachelor's+ in 93409 (San Luis Obispo ) to 55.9% in 93401 (San Luis Obispo) — the breadth of educational profiles across the area.
Within California, this is the #24 most populous of 58 counties and ranks #27 for median household income .
Weighted by population, the typical household earns about $97,218 across the county — reflecting what a typical resident sees, not a simple ZIP average.
39.8% of adults age 25+ hold a bachelor's degree or higher (76,178 of 191,618 reporting). The most-educated ZIPs cluster around San Luis Obispo.
22 Standard delivery, 12 PO Box only, 2 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 93446 | Paso Robles | Standard | 45,554 | $97,943 | 394.7 | 2.9% |
| 93422 | Atascadero | Standard | 33,002 | $91,780 | 64.9 | 3.5% |
| 93420 | Arroyo Grande | Standard | 31,345 | $110,553 | 231.2 | 4.2% |
| 93401 | San Luis Obispo | Standard | 29,202 | $96,824 | 79.4 | 4.6% |
| 93405 | San Luis Obispo | Standard | 25,002 | $60,399 | 91.7 | -28.2% |
| 93444 | Nipomo | Standard | 21,611 | $110,867 | 75.2 | 10.4% |
| 93402 | Los Osos | Standard | 14,197 | $109,090 | 34.9 | -4.6% |
| 93433 | Grover Beach | Standard | 12,600 | $86,458 | 2.2 | -5.5% |
| 93442 | Morro Bay | Standard | 11,571 | $95,623 | 42.7 | 5.2% |
| 93465 | Templeton | Standard | 11,039 | $129,259 | 87.1 | 14.4% |
| 93449 | Pismo Beach | Standard | 8,014 | $118,072 | 9.2 | 2.9% |
| 93410 | San Luis Obispo | Standard | 7,396 | — | 0.0 | — |
| 93445 | Oceano | Standard | 6,857 | $72,261 | 2.1 | -4.3% |
| 93428 | Cambria | Standard | 6,399 | $99,762 | 86.2 | 0.8% |
| 93451 | San Miguel | Standard | 5,207 | $98,188 | 513.6 | 24.4% |
| 93430 | Cayucos | Standard | 3,125 | $89,519 | 62.2 | 14.3% |
| 93409 | San Luis Obispo | Unique | 2,952 | — | 0.0 | — |
| 93453 | Santa Margarita | Standard | 2,344 | $78,288 | 847.1 | -32.8% |
| 93426 | Bradley | Standard | 1,564 | $102,500 | 296.0 | 2.8% |
| 93461 | Shandon | Standard | 1,548 | $92,482 | 458.9 | -6.8% |
| 93432 | Creston | Standard | 1,142 | $146,938 | 91.2 | 43.1% |
| 93424 | Avila Beach | PO Box | 962 | — | 21.5 | 12.8% |
| 93407 | San Luis Obispo | Standard | 347 | — | 0.1 | — |
| 93452 | San Simeon | Standard | 217 | $54,625 | 106.3 | -69.9% |
| 93408 | San Luis Obispo | Unique | 6 | — | 0.0 | — |
| 93443 | Morro Bay | PO Box | — | — | 0.0 | — |
| 93423 | Atascadero | PO Box | — | — | 0.0 | — |
| 93435 | Harmony | PO Box | — | — | 10.1 | — |
| 93447 | Paso Robles | PO Box | — | — | 0.0 | — |
| 93412 | Los Osos | PO Box | — | — | 0.0 | — |
| 93403 | San Luis Obispo | PO Box | — | — | 0.0 | — |
| 93406 | San Luis Obispo | PO Box | — | — | 0.0 | — |
| 93448 | Pismo Beach | PO Box | — | — | 0.0 | — |
| 93421 | Arroyo Grande | PO Box | — | — | 0.0 | — |
| 93483 | Grover Beach | PO Box | — | — | 0.0 | — |
| 93475 | Oceano | PO Box | — | — | 0.0 | — |