Which ZIP code in Marin County has the fastest population growth?

94957 (Ross), at 90.4%, 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.

Fastest-growing ZIP codes in Marin County, CA

These are the 19 ZIP codes in Marin County with the fastest population growth, out of 19 with at least 1,000 residents. 94957 (Ross, 90.4%), 94973 (Woodacre, 37.5%) and 94924 (Bolinas, 21.7%) lead the list. There is no single "best" ZIP code in Marin 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 Marin County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	94957	Ross	90.4%	2,321	717	—
2	94973	Woodacre	37.5%	1,689	646	—
3	94924	Bolinas	21.7%	1,372	653	183
4	94939	Larkspur	8.4%	7,315	3,323	3,615
5	94965	Sausalito	2.9%	11,724	6,043	6,094
6	94925	Corte Madera	2.4%	10,077	4,036	4,102
7	94960	San Anselmo	2.3%	16,232	6,546	6,288
8	94941	Mill Valley	2.2%	32,706	12,916	13,284
9	94903	San Rafael	0.6%	30,615	12,013	12,510
10	94901	San Rafael	-1.0%	41,307	15,631	16,083
11	94920	Belvedere Tiburon	-1.0%	12,609	4,934	5,709
12	94904	Greenbrae	-1.4%	12,815	5,558	5,514
13	94930	Fairfax	-3.7%	8,406	3,565	3,805
14	94952	Petaluma	-4.8%	33,785	13,985	14,079
15	94949	Novato	-4.9%	17,787	6,955	7,449
16	94956	Point Reyes Station	-5.8%	1,080	633	24
17	94947	Novato	-6.8%	24,100	8,854	9,616
18	94945	Novato	-7.4%	17,635	7,081	7,073
19	94964	San Quentin	-25.7%	2,344	204	—

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; 19 of 29 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 11,382 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 94957 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 Marin County has the fastest population growth?: 94957 (Ross), at 90.4%, among 19 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.