Residential delivery area · New York
ZIP Code 11731: East Northport, NY
ZIP code 11731 uses the postal name East Northport, New York and lies entirely in Suffolk County (Census 2020 ZIP-county file). About 30,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $161,132 (Census Bureau, ACS 2020-2024). By Census place, its land lies in East Northport (47%), Elwood (25%), Commack (23%) and Dix Hills (5%).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- East Northport · its only residential ZIP
- County
- Suffolk County
- Census places
- East Northport (47%) census-designated place; Elwood (25%) census-designated place; Commack (23%) census-designated place; Dix Hills (5%) 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
- 8.3 sq mi · 3,605 people per sq mi
Where is ZIP code 11731?
11731 centers on 40.863°, -73.317° and covers 8.3 square miles of land. It borders 6 ZIP codes: 11740, 11725, 11754, 11746, 11768, 11743.
The map draws ZIP code areas only. For the streets inside 11731, 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 11731 compare with the rest of Suffolk County?
| Measure | 11731 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 29,999 | 12th of 108 | 210th of 1,826 |
| Median household income | $161k | 16th of 81 | 79th of 1,081 |
| Median home value | $647k | 36th of 88 | 250th of 1,172 |
Its median household income is higher than in 97% 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 11731?
The 2020 Census counted 30,353 people in 11731; the ACS, which samples households over 2020-2024, estimates 29,999. Between the 2010 and 2020 censuses its population grew 0.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 29,999
- 2020 Census count
- 30,353+0.6% since 2010 (30,184)
- Households
- 10,811
- Median age
- 46.2
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 11731?
Of the 29,999 people the ACS estimates in 11731, 19.8% are under 18 and 18.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (80.1%).
- Under 1819.8%
- 18 to 6461.8%
- 65 and older18.4%
- White, not Hispanic80.1%
- Hispanic or Latino9.1%
- Other or two or more4.5%
- Asian, not Hispanic4.0%
- Black, not Hispanic2.2%
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 11731 earn?
Median household income is $161,132 (ACS 2020-2024), the 16th highest of the 81 ranked ZIP codes in Suffolk County. It rose from $147,998 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $161,132
- Income per person
- $67,081
- Below the poverty line
- 6.0%
- Unemployed (of the labor force)
- 3.9%
- Adults 25+ with a bachelor's degree
- 53.2%
- Adjusted gross income per tax return, 2022
- $117,68916,040 returns; wages 70% 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 11731?
FHFA's house price index for 11731, built from repeat sales and appraisals of the same homes, rose 76% from 2015 to 2025 and rose 49% from 2020 to 2025, and moved +6.8% in 2025.
- Median home value (owners' estimate)
- $646,600
- Median gross rent
- $2,412
- Homes owned by their occupants
- 90.4%
- Housing units
- 11,125
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 11731?
871 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).
- Construction126
- Other services (except public administration)115
- Retail trade114
- Professional, scientific, and technical services109
- Health care and social assistance77
- Accommodation and food services72
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 11731?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11740 | Greenlawn | 10,127 | $152k | 2.3 mi |
| 11725 | Commack | 29,073 | $168k | 2.4 mi |
| 11754 | Kings Park | 17,565 | $123k | 3.8 mi |
| 11746 | Huntington Station | 65,747 | $165k | 4.1 mi |
| 11768 | Northport | 22,030 | $173k | 4.4 mi |
| 11743 | Huntington | 43,490 | $183k | 5.7 mi |
| 11721 | Centerport | 6,426 | $197k | 4.0 mi (near) |
| 11787 | Smithtown | 34,499 | $143k | 5.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.