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

06807 (Cos Cob), at 47.2%, among 46 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 Fairfield County, CT

These are the 25 ZIP codes in Fairfield County with the highest share of households with children, out of 46 with at least 1,000 residents. 06807 (Cos Cob, 47.2%), 06878 (Riverside, 46.7%) and 06820 (Darien, 44.6%) lead the list. There is no single "best" ZIP code in Fairfield 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 Fairfield County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	06807	Cos Cob	47.2%	7,650	2,828	2,839
2	06878	Riverside	46.7%	8,328	2,686	2,861
3	06820	Darien	44.6%	21,936	7,234	7,593
4	06611	Trumbull	43.2%	37,281	12,153	13,855
5	06607	Bridgeport	42.5%	7,979	2,596	3,073
6	06897	Wilton	42.2%	18,777	6,122	6,734
7	06870	Old Greenwich	41.9%	7,864	2,756	2,794
8	06840	New Canaan	41.6%	20,870	7,153	7,492
9	06883	Weston	40.1%	10,396	3,568	3,614
10	06824	Fairfield	38.5%	36,716	11,940	12,487
11	06468	Monroe	37.9%	18,949	6,209	6,978
12	06880	Westport	37.8%	27,583	9,785	10,731
13	06482	Sandy Hook	36.7%	12,000	4,142	4,196
14	06608	Bridgeport	35.5%	12,146	4,470	4,968
15	06812	New Fairfield	35.4%	13,584	4,562	5,380
16	06825	Fairfield	35.2%	21,982	7,813	8,001
17	06877	Ridgefield	35.1%	25,110	9,194	9,583
18	06804	Brookfield	34.2%	17,908	6,638	7,521
19	06854	Norwalk	34.1%	32,118	11,769	11,741
20	06890	Southport	33.9%	4,653	1,791	1,832
21	06810	Danbury	33.6%	55,833	21,218	21,531
22	06906	Stamford	33.5%	9,199	3,297	3,753
23	06612	Easton	32.8%	7,670	2,539	2,733
24	06907	Stamford	32.5%	8,705	3,541	3,778
25	06801	Bethel	32.4%	20,796	7,782	8,246

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; 46 of 46 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 27,497 households, on 69 carrier routes with 30,221 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 06807 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 Fairfield County has the highest share of households with children?: 06807 (Cos Cob), at 47.2%, among 46 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.