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

13820 (Oneonta), at 31.8 (±1.6), among 17 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 Delaware County, NY

These are the 17 ZIP codes in Delaware County with the lowest median age, out of 17 with at least 1,000 residents. 13820 (Oneonta, 31.8), 13753 (Delhi, 34.5) and 13838 (Sidney, 37.0) lead the list. There is no single "best" ZIP code in Delaware 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 Delaware County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	13820	Oneonta	31.8 ±1.6	23,056	8,604	7,904
2	13753	Delhi	34.5 ±3.1	5,696	1,868	1,958
3	13838	Sidney	37.0 ±11.8	4,251	1,894	1,903
4	13849	Unadilla	44.3 ±7.3	4,427	1,867	1,785
5	13775	Franklin	47.4 ±5.6	1,752	783	666
6	12430	Fleischmanns	48.6 ±5.7	1,253	525	313
7	13839	Sidney Center	49.3 ±9.1	1,360	554	610
8	13856	Walton	50.0 ±2.6	5,881	2,645	3,137
9	12167	Stamford	50.2 ±4.6	2,279	1,003	1,203
10	13731	Andes	52.6 ±5.2	1,038	544	577
11	13754	Deposit	52.7 ±6.7	2,768	1,226	1,448
12	12093	Jefferson	53.2 ±3.4	1,276	632	734
13	12468	Prattsville	54.1 ±7.5	1,329	626	575
14	12776	Roscoe	56.4 ±5.4	2,073	836	928
15	13757	East Meredith	56.5 ±10.1	1,130	515	521
16	13783	Hancock	59.1 ±3.9	2,035	1,005	1,425
17	12455	Margaretville	59.1 ±3.4	1,689	866	549

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; 17 of 43 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 15,016 households, on 34 carrier routes with 14,216 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 13820 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

Map it and price it

EDDM guides

Frequently asked questions

Which ZIP code in Delaware County has the lowest median age?: 13820 (Oneonta), at 31.8 (±1.6), among 17 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.