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

92278 (Twentynine Palms), at 21.1 (±0.3), among 71 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 Bernardino County, CA

These are the 25 ZIP codes in San Bernardino County with the lowest median age, out of 71 with at least 1,000 residents. 92278 (Twentynine Palms, 21.1), 92310 (Fort Irwin, 23.6) and 92398 (Yermo, 25.5) lead the list. There is no single "best" ZIP code in San Bernardino 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 Bernardino County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	92278	Twentynine Palms	21.1 ±0.3	3,913	0	—
2	92310	Fort Irwin	23.6 ±0.8	8,419	2,798	2,567
3	92398	Yermo	25.5 ±14.2	2,609	769	—
4	92277	Twentynine Palms	28.1 ±1.1	26,277	10,501	9,644
5	92301	Adelanto	29.7 ±1.5	38,577	9,442	10,164
6	92407	San Bernardino	30.4 ±0.9	71,711	18,645	19,350
7	92411	San Bernardino	31.2 ±1.7	27,249	6,828	7,185
8	92410	San Bernardino	31.4 ±0.9	47,869	13,476	14,508
9	92335	Fontana	31.5 ±0.7	97,511	25,666	25,766
10	91764	Ontario	31.8 ±1.0	56,270	16,624	18,015
11	92392	Victorville	32.0 ±1.6	65,429	17,616	19,464
12	92376	Rialto	32.1 ±0.7	84,394	21,905	23,383
13	92405	San Bernardino	32.2 ±1.1	31,217	9,627	9,383
14	92374	Redlands	32.4 ±1.7	45,262	14,359	16,175
15	92404	San Bernardino	32.5 ±1.3	63,243	19,020	18,495
16	93516	Boron	32.6 ±0.7	2,889	1,000	1,061
17	92394	Victorville	32.8 ±1.9	41,614	10,132	10,721
18	91708	Chino	32.8 ±1.4	19,213	5,701	6,941
19	92408	San Bernardino	32.8 ±1.9	14,325	4,208	4,390
20	92345	Hesperia	32.9 ±0.9	88,706	26,141	28,101
21	91763	Montclair	33.5 ±1.7	37,700	10,612	11,175
22	92311	Barstow	33.5 ±1.6	33,954	12,225	12,106
23	92395	Victorville	33.9 ±1.4	47,375	15,566	15,831
24	92371	Phelan	34.0 ±3.1	21,580	6,025	4,114
25	91762	Ontario	34.1 ±1.3	64,235	19,480	21,062

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; 71 of 95 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 23,510 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 92278 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 Bernardino County has the lowest median age?: 92278 (Twentynine Palms), at 21.1 (±0.3), among 71 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.