Which ZIP code in Santa Clara County has the highest median age?

94028 (Portola Valley), at 57.2 (±5.8), among 60 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 Santa Clara County, CA

These are the 25 ZIP codes in Santa Clara County with the highest median age, out of 60 with at least 1,000 residents. 94028 (Portola Valley, 57.2), 95135 (San Jose, 53.1) and 95070 (Saratoga, 51.6) lead the list. There is no single "best" ZIP code in Santa Clara 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 Santa Clara County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	94028	Portola Valley	57.2 ±5.8	6,531	2,637	2,612
2	95135	San Jose	53.1 ±2.0	20,129	7,515	7,571
3	95070	Saratoga	51.6 ±1.2	31,417	11,194	11,781
4	95030	Los Gatos	51.6 ±2.1	13,151	5,122	5,388
5	94022	Los Altos	48.5 ±1.7	20,027	7,275	7,892
6	95002	Alviso	48.2 ±5.6	1,542	521	—
7	94024	Los Altos	47.6 ±1.4	23,051	7,938	8,068
8	95120	San Jose	47.5 ±0.9	36,967	12,660	12,916
9	95046	San Martin	47.3 ±5.3	6,324	1,797	1,561
10	94301	Palo Alto	46.7 ±3.3	17,508	7,167	7,919
11	95033	Los Gatos	45.3 ±3.4	9,600	3,766	3,621
12	95032	Los Gatos	44.0 ±1.2	27,313	10,450	11,051
13	95121	San Jose	42.8 ±1.5	36,463	9,828	9,796
14	94550	Livermore	42.3 ±1.1	49,873	17,564	18,701
15	94306	Palo Alto	42.3 ±2.2	27,183	10,640	12,003
16	95132	San Jose	41.9 ±1.4	40,334	12,068	12,018
17	95148	San Jose	41.1 ±1.7	44,995	12,110	11,718
18	95014	Cupertino	41.0 ±0.8	60,932	21,868	22,398
19	95125	San Jose	41.0 ±1.2	54,419	20,779	21,658
20	95129	San Jose	40.9 ±1.1	41,321	14,105	14,660
21	95119	San Jose	40.0 ±1.6	10,841	3,649	3,852
22	95124	San Jose	39.7 ±1.2	52,096	17,586	17,617
23	95008	Campbell	39.7 ±1.2	48,333	19,052	20,338
24	94303	Palo Alto	39.5 ±1.3	46,879	14,466	14,447
25	95118	San Jose	39.5 ±1.5	32,015	11,404	11,866

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; 60 of 62 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 33,743 households, on 75 carrier routes with 35,244 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 94028 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 Santa Clara County has the highest median age?: 94028 (Portola Valley), at 57.2 (±5.8), among 60 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.