Which ZIP code in Contra Costa County has the highest share of households with children?

94582 (San Ramon), at 46.8%, among 43 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.

ZIP codes with the most families with kids in Contra Costa County, CA

These are the 25 ZIP codes in Contra Costa County with the highest share of households with children, out of 43 with at least 1,000 residents. 94582 (San Ramon, 46.8%), 94513 (Brentwood, 44.5%) and 94506 (Danville, 42.4%) lead the list. There is no single "best" ZIP code in Contra Costa County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

ZIP codes with the most families with kids in Contra Costa County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	94582	San Ramon	46.8%	47,424	16,466	16,067
2	94513	Brentwood	44.5%	69,755	22,390	23,743
3	94506	Danville	42.4%	27,055	9,185	8,802
4	94801	Richmond	41.5%	33,591	10,593	10,417
5	94561	Oakley	41.1%	46,368	14,105	15,581
6	94565	Pittsburg	40.8%	100,488	30,537	32,143
7	94583	San Ramon	40.8%	39,583	13,890	14,426
8	94509	Antioch	38.6%	70,090	23,476	23,386
9	94806	San Pablo	38.3%	62,546	20,538	20,522
10	94588	Pleasanton	38.3%	34,328	12,465	12,794
11	94563	Orinda	38.0%	19,378	7,218	7,247
12	94556	Moraga	37.9%	15,998	5,614	6,003
13	94531	Antioch	37.7%	46,387	13,905	15,350
14	95219	Stockton	37.7%	31,713	11,517	12,387
15	94526	Danville	37.2%	32,584	11,843	12,489
16	94549	Lafayette	36.8%	28,420	10,682	11,250
17	94517	Clayton	35.1%	12,316	4,511	4,615
18	94520	Concord	33.5%	37,381	13,721	14,012
19	94505	Discovery Bay	32.9%	14,970	5,446	5,987
20	94551	Livermore	32.7%	37,885	14,052	14,716
21	94804	Richmond	31.7%	44,891	16,250	15,613
22	94523	Pleasant Hill	31.6%	34,592	13,452	14,705
23	94547	Hercules	31.5%	26,302	9,355	9,220
24	94528	Diablo	31.4%	1,049	424	—
25	94507	Alamo	31.1%	14,586	5,098	5,496

How we ranked them

Ranked by the share of households with one or more people under 18 (ACS Data Profile, 2020–2024). The Census Bureau does not publish a margin of error for this share in our files. ZIP codes need at least 1,000 residents to be ranked; 43 of 47 qualify.

Which of these to mail, and why

Households with children buy tutoring, youth sports, pediatric and family dental care, child care, birthday venues and family dining. EDDM reaches every door on a route, so a higher share means more of your pieces land with families.

The top five ZIP codes on this list hold 72,739 households, on 110 carrier routes with 74,610 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 94582 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 Contra Costa County has the highest share of households with children?: 94582 (San Ramon), at 46.8%, among 43 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the share of households with one or more people under 18 (ACS Data Profile, 2020–2024). The Census Bureau does not publish a margin of error for this share in our files.
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.