Residential delivery area · New York
ZIP Code 11749: Islandia, NY
ZIP code 11749 is in Islandia, New York, entirely in Suffolk County (Census 2020 ZIP-county file). About 3,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $116,313 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Islandia · its only residential ZIP
- County
- Suffolk County
- Census places
- Islandia
- Metro area
- New York-Newark-Jersey City, NY-NJ
- House district
- NY-2 119th Congress
- State
- New York
- Time zone
- Eastern
- Land area
- 2.2 sq mi · 1,646 people per sq mi
Where is ZIP code 11749?
11749 centers on 40.807°, -73.171° and covers 2.2 square miles of land. It borders 3 ZIP codes: 11722, 11788, 11779.
The map draws ZIP code areas only. For the streets inside 11749, 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 11749 compare with the rest of Suffolk County?
| Measure | 11749 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 3,600 | 75th of 108 | 837th of 1,826 |
| Median household income | $116k | 64th of 81 | 262nd of 1,081 |
| Median home value | $477k | 72nd of 88 | 375th of 1,172 |
Its median household income is higher than in 89% of U.S. residential ZIP codes, and it is denser than 83% 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 11749?
The 2020 Census counted 3,567 people in 11749; the ACS, which samples households over 2020-2024, estimates 3,600. Between the 2010 and 2020 censuses its population grew 6.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,600
- 2020 Census count
- 3,567+6.6% since 2010 (3,345)
- Households
- 1,217
- Median age
- 43.3
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 11749?
Of the 3,600 people the ACS estimates in 11749, 14.4% are under 18 and 17.3% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (32.0%), then White (not Hispanic) (29.1%).
- Under 1814.4%
- 18 to 6468.3%
- 65 and older17.3%
- Hispanic or Latino32.0%
- White, not Hispanic29.1%
- Black, not Hispanic17.5%
- Other or two or more15.1%
- Asian, not Hispanic6.3%
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 11749 earn?
Median household income is $116,313 (ACS 2020-2024), the 64th highest of the 81 ranked ZIP codes in Suffolk County. It is not measurably different from 2015-2019 ($114,791 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $116,313
- Income per person
- $46,560
- Below the poverty line
- 7.7%
- Unemployed (of the labor force)
- 5.5%
- Adults 25+ with a bachelor's degree
- 32.5%
- Adjusted gross income per tax return, 2022
- $75,2541,910 returns; wages 73% 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 11749?
FHFA's house price index for 11749, built from repeat sales and appraisals of the same homes, rose 123% from 2015 to 2025 and rose 72% from 2020 to 2025, and moved +28.4% in 2025.
- Median home value (owners' estimate)
- $477,400
- Median gross rent
- $2,019
- Homes owned by their occupants
- 96.0%
- Housing units
- 1,288
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 11749?
399 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services67
- Wholesale trade57
- Construction42
- Retail trade40
- Health care and social assistance36
- Finance and insurance30
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 11749?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11722 | Central Islip | 39,033 | $114k | 2.1 mi |
| 11788 | Hauppauge | 17,374 | $150k | 2.4 mi |
| 11779 | Ronkonkoma | 38,206 | $112k | 3.0 mi |
| 11716 | Bohemia | 9,659 | $129k | 2.8 mi (near) |
| 11767 | Nesconset | 14,964 | $153k | 3.1 mi (near) |
| 11752 | Islip Terrace | 9,204 | $152k | 3.4 mi (near) |
| 11787 | Smithtown | 34,499 | $143k | 3.8 mi (near) |
| 11755 | Lake Grove | 12,144 | $119k | 4.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.