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

11549 (Hempstead), at 20.3 (±0.3), among 65 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 Nassau County, NY

These are the 25 ZIP codes in Nassau County with the lowest median age, out of 65 with at least 1,000 residents. 11549 (Hempstead, 20.3), 11548 (Greenvale, 22.4) and 11568 (Old Westbury, 29.2) lead the list. There is no single "best" ZIP code in Nassau 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 Nassau County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	11549	Hempstead	20.3 ±0.3	2,359	0	—
2	11548	Greenvale	22.4 ±1.0	2,261	410	421
3	11568	Old Westbury	29.2 ±2.8	4,144	974	1,072
4	11024	Great Neck	31.3 ±4.0	9,155	2,284	2,376
5	11096	Inwood	32.5 ±2.7	10,428	2,644	2,294
6	11598	Woodmere	33.0 ±5.5	13,599	3,753	4,197
7	11516	Cedarhurst	33.9 ±4.1	9,112	3,207	2,450
8	11559	Lawrence	34.1 ±8.8	8,878	2,636	2,728
9	11575	Roosevelt	36.3 ±2.3	18,705	4,452	3,904
10	11552	West Hempstead	36.5 ±2.7	25,174	7,469	7,382
11	11581	Valley Stream	37.2 ±2.2	22,818	7,120	7,100
12	11553	Uniondale	37.9 ±1.7	27,875	7,200	6,207
13	11550	Hempstead	38.8 ±1.8	60,960	17,895	16,538
14	11003	Elmont	38.9 ±1.8	45,174	12,036	10,111
15	11023	Great Neck	39.3 ±5.5	9,630	3,159	3,293
16	11520	Freeport	39.8 ±1.6	44,910	14,117	13,463
17	11557	Hewlett	39.9 ±4.3	8,504	2,641	2,892
18	11579	Sea Cliff	40.5 ±5.3	5,033	1,769	1,981
19	11010	Franklin Square	40.6 ±2.3	25,604	8,455	7,408
20	11596	Williston Park	40.6 ±2.4	10,516	3,470	3,595
21	11804	Old Bethpage	40.6 ±5.8	4,835	1,502	1,730
22	11756	Levittown	40.8 ±1.3	42,665	13,732	13,388
23	11510	Baldwin	41.1 ±1.1	35,701	11,148	10,768
24	11771	Oyster Bay	41.1 ±4.3	10,908	3,961	3,832
25	11783	Seaford	41.3 ±2.5	21,127	7,084	7,240

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; 65 of 70 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 6,312 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 11549 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 Nassau County has the lowest median age?: 11549 (Hempstead), at 20.3 (±0.3), among 65 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.