Which ZIP code in Jefferson County has the lowest median age?

13602 (Fort Drum), at 22.3 (±0.3), among 23 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.

Youngest ZIP codes in Jefferson County, NY

These are the 23 ZIP codes in Jefferson County with the lowest median age, out of 23 with at least 1,000 residents. 13602 (Fort Drum, 22.3), 13603 (Watertown, 24.0) and 13637 (Evans Mills, 24.9) 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.

Youngest ZIP codes in Jefferson County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	13602	Fort Drum	22.3 ±0.3	2,440	0	—
2	13603	Watertown	24.0 ±1.3	14,136	5,122	3,977
3	13637	Evans Mills	24.9 ±1.3	5,212	2,240	1,927
4	13691	Theresa	31.9 ±8.3	2,990	1,157	1,256
5	13673	Philadelphia	32.5 ±4.2	2,097	758	903
6	13616	Calcium	33.8 ±23.5	1,430	734	722
7	13601	Watertown	35.7 ±1.3	36,839	16,663	16,863
8	13612	Black River	36.8 ±4.1	2,865	1,164	1,065
9	13656	La Fargeville	37.4 ±2.3	2,942	1,086	1,065
10	13619	Carthage	37.6 ±3.1	10,578	4,184	4,295
11	13606	Adams Center	37.6 ±11.7	2,468	894	806
12	13605	Adams	37.7 ±5.1	5,259	2,189	1,759
13	13661	Mannsville	38.9 ±8.2	1,908	723	598
14	13608	Antwerp	41.2 ±4.5	1,676	706	559
15	13679	Redwood	43.9 ±10.0	1,205	499	869
16	13624	Clayton	44.5 ±6.7	4,650	1,928	2,662
17	13626	Copenhagen	47.2 ±10.5	2,202	911	664
18	13685	Sackets Harbor	47.8 ±8.4	2,362	1,183	1,145
19	13622	Chaumont	47.8 ±11.6	1,859	742	844
20	13634	Dexter	48.4 ±7.8	3,570	1,547	1,346
21	13618	Cape Vincent	56.6 ±7.0	1,771	871	768
22	13607	Alexandria Bay	59.6 ±2.5	2,020	1,042	1,114
23	13650	Henderson	60.8 ±3.7	1,236	598	619

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 23 of 40 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 9,277 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 13602 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Jefferson County has the lowest median age?: 13602 (Fort Drum), at 22.3 (±0.3), among 23 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
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.