Which ZIP code in San Luis Obispo County has the highest median age?

93428 (Cambria), at 61.2 (±3.6), among 22 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Oldest ZIP codes in San Luis Obispo County, CA

These are the 22 ZIP codes in San Luis Obispo County with the highest median age, out of 22 with at least 1,000 residents. 93428 (Cambria, 61.2), 93430 (Cayucos, 60.1) and 93449 (Pismo Beach, 55.1) lead the list. There is no single "best" ZIP code in San Luis Obispo County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Oldest ZIP codes in San Luis Obispo County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	93428	Cambria	61.2 ±3.6	6,399	2,974	3,558
2	93430	Cayucos	60.1 ±4.0	3,125	1,571	1,795
3	93449	Pismo Beach	55.1 ±4.5	8,014	4,129	5,323
4	93442	Morro Bay	54.5 ±2.9	11,571	5,433	6,026
5	93453	Santa Margarita	54.5 ±16.0	2,344	1,189	747
6	93402	Los Osos	48.7 ±1.7	14,197	6,007	6,214
7	93420	Arroyo Grande	48.2 ±3.0	31,345	12,672	12,288
8	93445	Oceano	46.2 ±3.6	6,857	2,874	2,488
9	93426	Bradley	44.3 ±10.3	1,564	598	928
10	93432	Creston	44.1 ±22.8	1,142	377	366
11	93465	Templeton	43.0 ±6.9	11,039	4,130	3,841
12	93444	Nipomo	42.7 ±2.2	21,611	7,776	7,679
13	93409	San Luis Obispo County	41.9 ±1.4	2,952	0	—
14	93446	Paso Robles	41.5 ±1.9	45,554	17,461	18,970
15	93422	Atascadero	40.7 ±1.4	33,002	12,895	13,232
16	93433	Grover Beach	40.5 ±1.6	12,600	4,945	5,756
17	93401	San Luis Obispo	37.1 ±1.7	29,202	13,522	15,724
18	93451	San Miguel	36.9 ±5.0	5,207	1,663	1,272
19	93461	Shandon	33.4 ±6.8	1,548	463	116
20	93454	Santa Maria	30.9 ±1.2	41,896	12,050	13,128
21	93405	San Luis Obispo	22.6 ±0.5	25,002	8,883	9,679
22	93410	California Polytechnic State University	19.2 ±0.2	7,396	14	—

How we ranked them

Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 22 of 26 qualify.

Which of these to mail, and why

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 15,296 households, on 31 carrier routes with 17,449 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 93428 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in San Luis Obispo County has the highest median age?: 93428 (Cambria), at 61.2 (±3.6), among 22 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.