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

93410 (California Polytechnic State University), at 19.2 (±0.2), 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.

Youngest ZIP codes in San Luis Obispo County, CA

These are the 22 ZIP codes in San Luis Obispo County with the lowest median age, out of 22 with at least 1,000 residents. 93410 (California Polytechnic State University, 19.2), 93405 (San Luis Obispo, 22.6) and 93454 (Santa Maria, 30.9) 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.

Youngest ZIP codes in San Luis Obispo County

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

How we ranked them

Ranked by median age of all residents, lowest 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

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 23,073 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 93410 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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EDDM guides

Frequently asked questions

Which ZIP code in San Luis Obispo County has the lowest median age?: 93410 (California Polytechnic State University), at 19.2 (±0.2), among 22 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest 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.