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

13603 (Watertown), at 53.3%, among 22 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 Jefferson County, NY

These are the 22 ZIP codes in Jefferson County with the highest share of households with children, out of 22 with at least 1,000 residents. 13603 (Watertown, 53.3%), 13673 (Philadelphia, 40.0%) and 13656 (La Fargeville, 37.7%) lead the list. There is no single "best" ZIP code in Jefferson 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 Jefferson County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	13603	Watertown	53.3%	14,136	5,122	3,977
2	13673	Philadelphia	40.0%	2,097	758	903
3	13656	La Fargeville	37.7%	2,942	1,086	1,065
4	13637	Evans Mills	37.1%	5,212	2,240	1,927
5	13619	Carthage	36.9%	10,578	4,184	4,295
6	13605	Adams	36.5%	5,259	2,189	1,759
7	13661	Mannsville	36.1%	1,908	723	598
8	13608	Antwerp	35.4%	1,676	706	559
9	13691	Theresa	33.2%	2,990	1,157	1,256
10	13606	Adams Center	28.9%	2,468	894	806
11	13612	Black River	28.7%	2,865	1,164	1,065
12	13634	Dexter	28.4%	3,570	1,547	1,346
13	13679	Redwood	27.9%	1,205	499	869
14	13601	Watertown	26.6%	36,839	16,663	16,863
15	13626	Copenhagen	24.7%	2,202	911	664
16	13622	Chaumont	23.5%	1,859	742	844
17	13624	Clayton	22.1%	4,650	1,928	2,662
18	13618	Cape Vincent	19.1%	1,771	871	768
19	13685	Sackets Harbor	17.3%	2,362	1,183	1,145
20	13607	Alexandria Bay	16.5%	2,020	1,042	1,114
21	13650	Henderson	12.9%	1,236	598	619
22	13616	Calcium	6.3%	1,430	734	722

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; 22 of 40 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 13,390 households, on 21 carrier routes with 12,167 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 13603 on the EDDM route map

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Frequently asked questions

Which ZIP code in Jefferson County has the highest share of households with children?: 13603 (Watertown), at 53.3%, among 22 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.