Residential delivery area · New York
ZIP Code 11755: Lake Grove, NY
ZIP code 11755 is in Lake Grove, New York, entirely in Suffolk County (Census 2020 ZIP-county file). About 12,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $119,364 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Lake Grove (90%) and Lake Ronkonkoma (6%), and 4% in smaller places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lake Grove · its only residential ZIP
- County
- Suffolk County
- Census places
- Lake Grove (90%); Lake Ronkonkoma (6%) census-designated place
- Metro area
- New York-Newark-Jersey City, NY-NJ
- House district
- NY-1 119th Congress
- State
- New York
- Time zone
- Eastern
- Land area
- 3.3 sq mi · 3,715 people per sq mi
Where is ZIP code 11755?
11755 centers on 40.858°, -73.117° and covers 3.3 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 11767, 11720, 11779, 11790, 11780.
The map draws ZIP code areas only. For the streets inside 11755, 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 11755 compare with the rest of Suffolk County?
| Measure | 11755 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 12,144 | 50th of 108 | 476th of 1,826 |
| Median household income | $119k | 61st of 81 | 243rd of 1,081 |
| Median home value | $602k | 47th of 88 | 292nd of 1,172 |
Its median household income is higher than in 90% of U.S. residential ZIP codes, and it is denser than 91% 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 11755?
The 2020 Census counted 12,118 people in 11755; the ACS, which samples households over 2020-2024, estimates 12,144. Between the 2010 and 2020 censuses its population fell 2.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 12,144
- 2020 Census count
- 12,118−2.2% since 2010 (12,387)
- Households
- 4,085
- Median age
- 40.2
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 11755?
Of the 12,144 people the ACS estimates in 11755, 23.6% are under 18 and 17.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (72.5%), then Hispanic or Latino (11.2%).
- Under 1823.6%
- 18 to 6459.3%
- 65 and older17.1%
- White, not Hispanic72.5%
- Hispanic or Latino11.2%
- Asian, not Hispanic10.3%
- Other or two or more4.3%
- Black, not Hispanic1.7%
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 11755 earn?
Median household income is $119,364 (ACS 2020-2024), the 61st highest of the 81 ranked ZIP codes in Suffolk County. It fell from $143,298 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $119,364
- Income per person
- $50,381
- Below the poverty line
- 7.4%
- Unemployed (of the labor force)
- 5.4%
- Adults 25+ with a bachelor's degree
- 45.2%
- Adjusted gross income per tax return, 2022
- $110,8166,350 returns; wages 69% 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 11755?
FHFA's house price index for 11755, built from repeat sales and appraisals of the same homes, rose 94% from 2015 to 2025 and rose 56% from 2020 to 2025, and moved +5.8% in 2025.
- Median home value (owners' estimate)
- $601,600
- Median gross rent
- $2,157
- Homes owned by their occupants
- 78.5%
- Housing units
- 4,153
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 11755?
413 business establishments had a location in this ZIP code in 2023, 4 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade158
- Construction45
- Professional, scientific, and technical services39
- Accommodation and food services36
- Health care and social assistance30
- Other services (except public administration)28
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 11755?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11767 | Nesconset | 14,964 | $153k | 1.7 mi |
| 11720 | Centereach | 29,292 | $135k | 2.0 mi |
| 11779 | Ronkonkoma | 38,206 | $112k | 3.1 mi |
| 11790 | Stony Brook | 21,074 | $171k | 3.5 mi |
| 11780 | Saint James | 15,018 | $145k | 4.7 mi |
| 11784 | Selden | 26,244 | $104k | 4.0 mi (near) |
| 11794 | Stony Brook | 831 | – | 4.3 mi (near) |
| 11738 | Farmingville | 18,877 | $140k | 4.4 mi (near) |
| 11749 | Islandia | 3,600 | $116k | 4.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.