Which ZIP code in Humboldt County has the lowest median age?

95521 (Arcata), at 29.2 (±1.6), among 19 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 Humboldt County, CA

These are the 19 ZIP codes in Humboldt County with the lowest median age, out of 19 with at least 1,000 residents. 95521 (Arcata, 29.2), 95546 (Hoopa, 32.1) and 95551 (Loleta, 34.9) lead the list. There is no single "best" ZIP code in Humboldt 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 Humboldt County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	95521	Arcata	29.2 ±1.6	21,980	9,225	9,391
2	95546	Hoopa	32.1 ±7.2	2,397	776	162
3	95551	Loleta	34.9 ±4.9	1,880	711	282
4	95562	Rio Dell	36.0 ±8.1	3,422	1,518	1,420
5	95549	Kneeland	36.2 ±7.5	1,024	333	365
6	95540	Fortuna	39.1 ±3.7	14,469	5,689	5,962
7	95501	Eureka	39.5 ±2.1	22,890	9,264	10,419
8	95503	Eureka	41.4 ±2.2	25,054	9,982	10,223
9	95519	Mckinleyville	41.7 ±1.3	18,728	7,429	8,106
10	95524	Bayside	46.7 ±5.7	1,634	658	665
11	95560	Redway	47.0 ±17.1	1,213	611	19
12	95570	Trinidad	47.7 ±3.7	2,640	1,171	758
13	95542	Garberville	48.8 ±7.8	2,463	1,202	877
14	95536	Ferndale	51.7 ±12.0	3,050	1,307	684
15	95547	Hydesville	52.4 ±12.5	1,263	491	182
16	95589	Whitethorn	52.7 ±19.4	1,115	574	507
17	95528	Carlotta	54.2 ±10.1	1,286	527	367
18	95525	Blue Lake	59.4 ±11.2	1,441	761	73
19	95573	Willow Creek	60.7 ±3.0	1,089	618	2

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; 19 of 35 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 12,563 households, on 24 carrier routes with 11,620 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 95521 on the EDDM route map

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Frequently asked questions

Which ZIP code in Humboldt County has the lowest median age?: 95521 (Arcata), at 29.2 (±1.6), among 19 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.