11717 ZIP Code, Brentwood, NY

11717 is a ZIP code in Brentwood, New York in Suffolk County. It covers 11 square miles of land. The closest ZIP codes are 11722, 11788 and 11729.

Quick facts

• Mailing city: Brentwood, NY
• County: Suffolk County
• Land area: 11 sq mi
• Carrier routes: 33 (11,439 homes)

Key figures

Businesses in 11717

962 business establishments with 12,065 employees (ZIP Codes Business Patterns 2023).

• Construction: 164
• Retail Trade: 132
• Health Care and Social Assistance: 125
• Administrative and Support and Waste Management and Remediation Services: 115
• Other Services (except Public Administration): 98
• Accommodation and Food Services: 65
• Transportation and Warehousing: 55
• Wholesale Trade: 50

EDDM carrier routes

11717 has 33 USPS carrier routes with 11,439 residential and 798 business mailboxes. Open the EDDM route map.

Carrier routes in 11717

11717 has 33 USPS carrier routes (33 city (C)) with 11,439 residential and 798 business mailboxes. Routes range from 129 homes (C043) to 539 homes (C041); the median route has 341 homes.

Best routes in 11717 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

1. Route C003 — USPS business mailboxes 109, 314 homes
2. Route C036 — USPS business mailboxes 97, 280 homes
3. Route C015 — USPS business mailboxes 75, 351 homes
4. Route C021 — USPS business mailboxes 70, 461 homes
5. Route C014 — USPS business mailboxes 64, 281 homes

Select these 5 routes on the route map

Every carrier route in 11717

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 11717 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

• 11722 — Central Islip CDP, NY (2.9 mi)
• 11788 — Hauppauge CDP, NY (3.1 mi)
• 11729 — Deer Park CDP, NY (4.1 mi)
• 11725 — Commack CDP, NY (4.2 mi)
• 11751 — Islip CDP, NY (4.2 mi)
• 11749 — Islandia village, NY (4.5 mi)
• 11752 — North Great River CDP, NY (4.5 mi)
• 11718 — Brightwaters village, NY (4.7 mi)

Areas that include 11717

• Brentwood, NY ZIP codes — 1 ZIP code
• Suffolk County ZIP codes — 108 ZIP codes
• New York ZIP code data

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 11717, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 11717 in?

11717 is a Brentwood, NY mailing address. By land area, 100% lies inside Brentwood.

What county is 11717 in?

11717 is in Suffolk County.

How many carrier routes and mailboxes are in 11717?

33 USPS carrier routes with 11,439 residential and 798 business mailboxes (12,237 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 11717?

The closest, measured center to center: 11722 (2.9 mi, Central Islip), 11788 (3.1 mi, Hauppauge), 11729 (4.1 mi, Deer Park), 11725 (4.2 mi, Commack), 11751 (4.2 mi, Islip) and 11749 (4.5 mi, Islandia).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.