Oldest ZIP codes in Suffolk County, NY
These are the 25 ZIP codes in Suffolk County with the highest median age, out of 88 with at least 1,000 residents. 11939 (East Marion, 68.1), 11957 (Orient, 64.1) and 11977 (Westhampton, 60.1) lead the list. There is no single "best" ZIP code in Suffolk County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.
Oldest ZIP codes in Suffolk County
| Rank | ZIP | Mailing city | Median age | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 11939 | East Marion | 68.1 ±7.5 | 1,331 | 666 | 609 |
| 2 | 11957 | Orient | 64.1 ±3.9 | 1,121 | 614 | 397 |
| 3 | 11977 | Westhampton | 60.1 ±9.2 | 2,843 | 1,041 | 1,461 |
| 4 | 11935 | Cutchogue | 56.5 ±4.7 | 2,863 | 1,134 | 1,755 |
| 5 | 11942 | East Quogue | 54.5 ±6.0 | 5,406 | 2,198 | 2,550 |
| 6 | 11961 | Ridge | 53.1 ±5.1 | 12,315 | 5,566 | 6,228 |
| 7 | 11933 | Calverton | 53.1 ±3.7 | 6,693 | 2,889 | 3,108 |
| 8 | 11963 | Sag Harbor | 52.5 ±4.3 | 8,390 | 3,613 | 4,761 |
| 9 | 11739 | Great River | 52.5 ±3.1 | 1,225 | 472 | — |
| 10 | 11955 | Moriches | 52.4 ±10.3 | 2,458 | 1,312 | 1,631 |
| 11 | 11976 | Water Mill | 52.3 ±5.0 | 2,952 | 1,315 | 1,971 |
| 12 | 11944 | Greenport | 51.3 ±5.2 | 5,037 | 2,072 | 2,452 |
| 13 | 11769 | Oakdale | 51.1 ±3.8 | 8,935 | 3,409 | 3,717 |
| 14 | 11968 | Southampton | 50.2 ±3.1 | 15,312 | 5,831 | 8,327 |
| 15 | 11721 | Centerport | 50.2 ±2.9 | 6,426 | 2,417 | 2,351 |
| 16 | 11747 | Melville | 49.4 ±2.0 | 20,513 | 7,543 | 7,763 |
| 17 | 11952 | Mattituck | 49.4 ±7.1 | 5,040 | 2,017 | 1,906 |
| 18 | 11766 | Mount Sinai | 49.0 ±3.4 | 10,750 | 3,934 | 4,656 |
| 19 | 11768 | Northport | 48.9 ±2.3 | 22,030 | 8,193 | 7,993 |
| 20 | 11971 | Southold | 48.7 ±8.0 | 6,361 | 2,437 | 3,186 |
| 21 | 11780 | Saint James | 47.4 ±2.5 | 15,018 | 5,459 | 5,605 |
| 22 | 11702 | Babylon | 47.4 ±2.5 | 13,909 | 5,432 | 5,633 |
| 23 | 11901 | Riverhead | 46.5 ±4.4 | 33,091 | 12,085 | 11,100 |
| 24 | 11787 | Smithtown | 46.3 ±1.6 | 34,499 | 11,857 | 12,152 |
| 25 | 11731 | East Northport | 46.2 ±2.0 | 29,999 | 10,811 | 10,284 |
How we ranked them
Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 88 of 108 qualify.
Which of these to mail, and why
Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.
The top five ZIP codes on this list hold 5,653 households, on 11 carrier routes with 6,772 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 11939 on the EDDM route map
More rankings
- Richest ZIP codes in Suffolk County
- ZIP codes with the highest home values in Suffolk County
- ZIP codes with the highest homeownership in Suffolk County
- ZIP codes with the most families with kids in Suffolk County
- ZIP codes with the most new movers in Suffolk County
- Youngest ZIP codes in Suffolk County
- Fastest-growing ZIP codes in Suffolk County
- All Suffolk County ZIP codes
Businesses that mail these ZIP codes
Map it and price it
EDDM guides
Frequently asked questions
- Which ZIP code in Suffolk County has the highest median age?
- 11939 (East Marion), at 68.1 (±7.5), among 88 ZIP codes with at least 1,000 residents.
- How is this ranking calculated?
- Ranked by median age of all residents, highest 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.