Which ZIP code in Santa Clara County has the fastest population growth?

94304 (Palo Alto), at 29.8%, 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.

Fastest-growing ZIP codes in Santa Clara County, CA

These are the 25 ZIP codes in Santa Clara County with the fastest population growth, out of 60 with at least 1,000 residents. 94304 (Palo Alto, 29.8%), 95113 (San Jose, 25.3%) and 94305 (Stanford, 12.9%) 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.

Fastest-growing ZIP codes in Santa Clara County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	94304	Palo Alto	29.8%	5,000	2,218	2,256
2	95113	San Jose	25.3%	2,640	1,421	2,053
3	94305	Stanford	12.9%	18,509	3,264	4,457
4	95023	Hollister	12.1%	59,889	17,897	19,332
5	94041	Mountain View	10.1%	16,050	6,960	7,700
6	95119	San Jose	8.1%	10,841	3,649	3,852
7	95046	San Martin	6.9%	6,324	1,797	1,561
8	94043	Mountain View	6.5%	33,176	13,369	15,720
9	95126	San Jose	5.9%	38,327	16,187	17,763
10	94301	Palo Alto	5.6%	17,508	7,167	7,919
11	95032	Los Gatos	4.9%	27,313	10,450	11,051
12	95054	Santa Clara	4.8%	25,704	9,963	12,388
13	95008	Campbell	4.3%	48,333	19,052	20,338
14	95129	San Jose	4.0%	41,321	14,105	14,660
15	95133	San Jose	4.0%	29,710	9,309	9,691
16	95134	San Jose	3.8%	30,471	14,050	14,010
17	95051	Santa Clara	3.7%	62,054	24,240	25,698
18	95020	Gilroy	3.6%	67,181	19,984	21,334
19	94085	Sunnyvale	3.4%	24,024	9,631	10,920
20	94022	Los Altos	3.2%	20,027	7,275	7,892
21	95050	Santa Clara	2.9%	39,834	15,831	17,032
22	95125	San Jose	2.4%	54,419	20,779	21,658
23	94087	Sunnyvale	1.9%	57,767	20,612	21,179
24	95123	San Jose	1.3%	69,677	24,377	25,028
25	95124	San Jose	1.2%	52,096	17,586	17,617

How we ranked them

Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 60 of 62 qualify.

Which of these to mail, and why

Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.

The top five ZIP codes on this list hold 31,760 households, on 55 carrier routes with 35,798 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 94304 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Santa Clara County has the fastest population growth?: 94304 (Palo Alto), at 29.8%, among 60 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have 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.

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