Residential delivery area · New York
ZIP Code 11751: Islip, NY
ZIP code 11751 is in Islip, New York, entirely in Suffolk County (Census 2020 ZIP-county file). About 14,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $116,559 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Islip · its only residential ZIP
- County
- Suffolk County
- Census places
- Islip census-designated place
- Metro area
- New York-Newark-Jersey City, NY-NJ
- House district
- NY-2 119th Congress
- State
- New York
- Time zone
- Eastern
- Land area
- 4.0 sq mi · 3,461 people per sq mi
Where is ZIP code 11751?
11751 centers on 40.730°, -73.214° and covers 4.0 square miles of land plus 0.6 of water. It borders 5 ZIP codes: 11730, 11706, 11752, 11722, 11717.
The map draws ZIP code areas only. For the streets inside 11751, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 11751 compare with the rest of Suffolk County?
| Measure | 11751 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 13,726 | 44th of 108 | 428th of 1,826 |
| Median household income | $117k | 63rd of 81 | 259th of 1,081 |
| Median home value | $563k | 55th of 88 | 317th of 1,172 |
Its median household income is higher than in 89% of U.S. residential ZIP codes, and it is denser than 90% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 11751?
The 2020 Census counted 14,790 people in 11751; the ACS, which samples households over 2020-2024, estimates 13,726. Between the 2010 and 2020 censuses its population fell 1.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 13,726
- 2020 Census count
- 14,790−1.1% since 2010 (14,961)
- Households
- 5,040
- Median age
- 45.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 11751?
Of the 13,726 people the ACS estimates in 11751, 18.7% are under 18 and 20.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (71.9%), then Hispanic or Latino (16.9%).
- Under 1818.7%
- 18 to 6460.9%
- 65 and older20.4%
- White, not Hispanic71.9%
- Hispanic or Latino16.9%
- Asian, not Hispanic5.7%
- Black, not Hispanic3.0%
- Other or two or more2.4%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 11751 earn?
Median household income is $116,559 (ACS 2020-2024), the 63rd highest of the 81 ranked ZIP codes in Suffolk County. It is not measurably different from 2015-2019 ($134,917 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $116,559±$17,531
- Income per person
- $51,520
- Below the poverty line
- 5.5%
- Unemployed (of the labor force)
- 5.6%
- Adults 25+ with a bachelor's degree
- 35.7%
- Adjusted gross income per tax return, 2022
- $111,4198,000 returns; wages 66% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 11751?
FHFA's house price index for 11751, built from repeat sales and appraisals of the same homes, rose 98% from 2015 to 2025 and rose 54% from 2020 to 2025, and moved +7.6% in 2025.
- Median home value (owners' estimate)
- $563,100
- Median gross rent
- $2,257
- Homes owned by their occupants
- 83.4%
- Housing units
- 5,318
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 11751?
349 business establishments had a location in this ZIP code in 2023, 17 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction55
- Other services (except public administration)53
- Health care and social assistance51
- Professional, scientific, and technical services39
- Retail trade33
- Accommodation and food services28
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 11751?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11730 | East Islip | 14,247 | $146k | 1.5 mi |
| 11706 | Bay Shore | 68,976 | $120k | 2.0 mi |
| 11752 | Islip Terrace | 9,204 | $152k | 2.8 mi |
| 11722 | Central Islip | 39,033 | $114k | 3.8 mi |
| 11717 | Brentwood | – | – | 4.2 mi |
| 11718 | Brightwaters | 3,179 | $218k | 2.7 mi (near) |
| 11739 | Great River | 1,225 | $164k | 2.9 mi (near) |
| 11795 | West Islip | 25,379 | $177k | 4.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.