Zip Code 11731
East Northport, New York — Suffolk County
📍 ZIP code 11731 is in East Northport, Suffolk County, New York.
ZIP code 11731 is located in East Northport, Suffolk County, New York. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 29,891. The area code for ZIP code 11731 is 631.
Quick Answer
Zip code 11731 is in East Northport, New York (Suffolk County). It has a population of 29,891, median household income of $158,819, and median home value of $622,100.
Population
29,891
Income
$158,819
Home Value
$622,100
Climate
83°F / 25°F
About Zip Code 11731
Zip code 11731 is located in East Northport, New York, within Suffolk County. Home to approximately 29,891 residents, this area sits at an elevation of 180 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 631.
The median household income is $158,819 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $622,100, and the cost of living index is 210 (110% above the national average of 100).
Summers average a high of 83°F while winters drop to 25°F. The area receives about 49 in of rain and 26 in of snow annually. The zip code covers 8.4 square miles of land area.
Key Statistics
29,891
$158,819
$622,100
Eastern (EST/EDT)
631
180 ft
8.4 sq mi
46.5
11,073
Advertisement
Compare With Nearby Zip Codes
| Metric | 11731 | 11740 | 11725 | 11754 | 11721 | 11746 |
|---|---|---|---|---|---|---|
| City | East Northport, NY | Greenlawn, NY | Commack, NY | Kings Park, NY | Centerport, NY | Huntington Station, NY |
| Population | 29,891 | 10,699 | 29,050 | 17,660 | 6,620 | 66,883 |
| Median Income | $158,819 | $161,705 | $168,324 | $123,406 | $206,250 | $158,309 |
| Home Value | $622,100 | $686,900 | $643,000 | $595,300 | $704,900 | $664,900 |
| Cost of Living | 210 | 213 | 224 | 185 | 250 | 210 |
| Median Age | 46.5 | 42.8 | 42.6 | 45.2 | 49.6 | 43.8 |
Cost of Living
100 = National Average. East Northport's cost of living is 110% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.9x
Demographics
Zip code 11731 has a population of 29,891 people with a median age of 46.5. There are 11,073 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
East Northport (11731) population trend from 2010 to 2024
↓ -3.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
83°F
25°F
49 in
26 in
East Northport experiences warm summers with average highs around 83°F. Winters are cool with lows averaging 25°F. The area receives about 26 in of snow per year.
Advertisement
Housing & Economy
Median Home Value
$622,100
Median Household Income
$158,819
With 11,073 housing units across 8.4 square miles, 11731 has a housing density of 1,318 units per square mile. The home price-to-income ratio is 3.9x.
Location & Geography
Latitude
40.8626°
Longitude
-73.3169°
Land Area
8.4 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 11731 (East Northport, NY) with distances:
Related Cities in New York
Explore zip codes in other New York cities:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 11731's $158,819. A way to compare East Northport to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 11731 (East Northport, NY). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
Explore New York
Popular "Near Me" Searches
Advertisement
People Also Ask
What zip code is East Northport, New York?
East Northport, New York uses zip code 11731.
What county is zip code 11731 in?
Zip code 11731 is located in Suffolk County, New York.
What is the population of zip code 11731?
The population of zip code 11731 is 29,891 with a median age of 46.5.
Is 11731 in East Northport, New York?
Yes, zip code 11731 is in East Northport, Suffolk County, New York. The area code is 631.
Frequently Asked Questions
What city is zip code 11731 in?
Zip code 11731 is in East Northport, New York. It is part of Suffolk County and uses the Eastern (EST/EDT) timezone.
What is zip code 11731?
Zip code 11731 is a U.S. postal code in East Northport, New York (Suffolk County). It has a population of 29,891 and covers 8.4 square miles.
What is the population of zip code 11731?
The population of zip code 11731 (East Northport, NY) is 29,891 with a median age of 46.5. There are approximately 11,073 housing units in this area.
What is the median income in zip code 11731?
The median household income in zip code 11731 (East Northport, NY) is $158,819 per year. The cost of living index is 210 (100 = national average).
What is the average home price in zip code 11731?
The median home value in zip code 11731 (East Northport, NY) is $622,100. The cost of living index is 210 compared to the national average of 100.
What county is zip code 11731 in?
Zip code 11731 is located in Suffolk County, New York. The primary city is East Northport.
What is the area code for zip code 11731?
Zip code 11731 in East Northport, NY uses area code 631. It is located in the Eastern (EST/EDT) timezone.
Is zip code 11731 a good place to live?
Zip code 11731 (East Northport, NY) has a cost of living index of 210 (100 = national average), a median household income of $158,819, and median home values of $622,100. The median age is 46.5. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 11731?
The cost of living index for zip code 11731 (East Northport, NY) is 210, where 100 represents the national average. This area is above the national average. Median home value: $622,100.
What schools serve zip code 11731?
Zip code 11731 in East Northport, New York is served by the local school district of Suffolk County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
People Also Searched For
Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.