11784 ZIP Code, Selden, NY
11784 is a ZIP code in Selden, New York in Suffolk County. It covers 5.5 square miles of land. The closest ZIP codes are 11720, 11738 and 11727. 26,244 people live here in 8,639 households. At about 4,790 people per square mile it is built up to city-neighborhood density, and most homes are owner-occupied (84%). Median household income is $104,369, above the New York median of $85,974.
Quick facts
- Mailing city: Selden, NY
- County: Suffolk County
- Land area: 5.5 sq mi
- Population: 26,244
- Median household income: $104,369
- Carrier routes: 14 (7,870 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 26,244 |
| Households | 8,639 |
| Median household income | $104,369 |
| Income per person | $43,370 |
| Median age | 39 |
| Homeowners | 84.0% |
| Median home value | $460,300 |
| Median rent | $2,240 |
| Bachelor's degree or higher | 29.2% |
| Average commute (minutes) | 32.1 |
| Households with kids under 18 | 33.7% |
| Moved in the past year | 6.9% |
| Below the poverty line | 6.4% |
| Broadband internet | 95.5% |
| Speak a non-English language at home | 23.1% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.1% |
| $10–15K | 1.4% |
| $15–25K | 3.2% |
| $25–35K | 3.5% |
| $35–50K | 4.9% |
| $50–75K | 16.4% |
| $75–100K | 12.7% |
| $100–150K | 21.9% |
| $150–200K | 15.0% |
| $200K+ | 16.9% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.6% |
| 10–19 | 12.6% |
| 20–24 | 6.3% |
| 25–34 | 14.5% |
| 35–44 | 11.7% |
| 45–54 | 13.7% |
| 55–64 | 14.1% |
| 65–74 | 9.0% |
| 75+ | 6.5% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 58.6% |
| Owned outright | 22.0% |
| Rented | 15.1% |
| Vacant | 4.3% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 85.1% |
| Townhome | 1.0% |
| 2–4 units | 4.0% |
| 5–19 units | 7.6% |
| 20+ units | 2.4% |
| Mobile / other | 0.0% |
Businesses in 11784
495 business establishments with 2,999 employees (ZIP Codes Business Patterns 2023).
- Construction: 96
- Retail Trade: 74
- Other Services (except Public Administration): 72
- Accommodation and Food Services: 55
- Health Care and Social Assistance: 54
- Professional, Scientific, and Technical Services: 40
- Administrative and Support and Waste Management and Remediation Services: 38
- Finance and Insurance: 16
EDDM carrier routes
11784 has 14 USPS carrier routes with 7,870 residential and 374 business mailboxes. Open the EDDM route map.
Carrier routes in 11784
11784 has 14 USPS carrier routes (14 city (C)) with 7,870 residential and 374 business mailboxes. Routes range from 320 homes (C004) to 814 homes (C016); the median route has 562 homes. The Census counted 8,639 households in 11784 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 3 |
| 500–749 | 10 |
| 750–999 | 1 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 11784 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C004 — USPS business mailboxes 144, 320 homes
- Route C018 — USPS business mailboxes 88, 441 homes
- Route C014 — USPS business mailboxes 85, 472 homes
- Route C013 — USPS business mailboxes 22, 648 homes
- Route C007 — USPS business mailboxes 14, 659 homes
Select these 5 routes on the route map
Every carrier route in 11784
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 536 | 0 | $108,285 | — | — | — |
| C003 | City | 599 | 1 | $112,872 | — | — | — |
| C004 | City | 320 | 144 | $122,636 | — | — | — |
| C005 | City | 559 | 0 | $128,468 | — | — | — |
| C006 | City | 540 | 4 | $150,000 | — | — | — |
| C007 | City | 659 | 14 | $105,478 | — | — | — |
| C010 | City | 595 | 8 | $108,285 | — | — | — |
| C011 | City | 602 | 1 | $103,968 | — | — | — |
| C013 | City | 648 | 22 | $81,815 | — | — | — |
| C014 | City | 472 | 85 | $128,468 | — | — | — |
| C015 | City | 521 | 1 | $105,107 | — | — | — |
| C016 | City | 814 | 5 | $103,968 | — | — | — |
| C017 | City | 564 | 1 | $128,468 | — | — | — |
| C018 | City | 441 | 88 | $103,968 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 11784 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 11720 — Centereach CDP, NY (2.1 mi)
- 11738 — Farmingville CDP, NY (2.1 mi)
- 11727 — Coram CDP, NY (2.2 mi)
- 11776 — Terryville CDP, NY (3.1 mi)
- 11742 — Holtsville CDP, NY (4 mi)
- 11755 — Lake Grove village, NY (4 mi)
- 11763 — Medford CDP, NY (4.3 mi)
- 11766 — Mount Sinai CDP, NY (5 mi)
Areas that include 11784
- Coram, NY ZIP codes — 3 ZIP codes
- Selden, NY ZIP codes — 1 ZIP code
- Suffolk County ZIP codes — 108 ZIP codes
- New York ZIP code data
Where it ranks
- No. 24 of 88: highest share of households with children in Suffolk County
- No. 15 of 88: lowest median age in Suffolk County
Mail every home in 11784
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 11784, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 11784 in?
- 11784 is a Selden, NY mailing address. By land area, 78% lies inside Selden, 15% lies inside Coram and 6% lies inside Farmingville.
- What county is 11784 in?
- 11784 is in Suffolk County.
- What is the population of 11784?
- About 26,244 people (±1,687), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 24,794.
- What is the median household income in 11784?
- $104,369 (±$10,234), compared with $85,974 for New York as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 11784?
- 14 USPS carrier routes with 7,870 residential and 374 business mailboxes (8,241 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 11784?
- The closest, measured center to center: 11720 (2.1 mi, Centereach), 11738 (2.1 mi, Farmingville), 11727 (2.2 mi, Coram), 11776 (3.1 mi, Terryville), 11742 (4 mi, Holtsville) and 11755 (4 mi, Lake Grove).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.