ZIP code
11731
East Northport, NY
11731 covers East Northport in Suffolk County, with 29,891 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 11731. Methodology
ZIP code map of 11731

About ZIP code 11731
Acceptable cities: E Northport, Elwood
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 11731. Not ACS. Methodology
People in 11731
Race
- White25,330
- Black or African American463
- American Indian or Alaska Native45
- Asian1,496
- Native Hawaiian and Pacific Islander6
- Other race899
- Two or more races2,114
Hispanic or Latino (any race): 2,930
Age
- Under 102,943
- 10 to 194,037
- 20 to 293,566
- 30 to 392,997
- 40 to 493,633
- 50 to 595,228
- 60 to 693,971
- 70 to 792,344
- 80 and older1,634
Income and housing in 11731
Education
- High school graduate95.7%
- Bachelor's degree51.0%
- Graduate degree24.3%
Places covering 11731
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- East Northport57.7%
- Elwood21.8%
- Commack18.9%
- Dix Hills1.7%
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Suffolk County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Population history for 11731
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 30,821 | |
| 2006 | 29,502 | |
| 2007 | 30,441 | |
| 2008 | 29,864 | |
| 2009 | 29,849 | |
| 2010 | 29,877 | |
| 2011 | 30,562 | 30,224 |
| 2012 | 29,959 | 29,920 |
| 2013 | 29,173 | 29,770 |
| 2014 | 28,969 | 29,610 |
| 2015 | 29,543 | 29,720 |
| 2016 | 29,743 | 29,490 |
| 2017 | 30,091 | 29,510 |
| 2018 | 30,357 | 29,560 |
| 2019 | 30,436 | 29,280 |
| 2020 | 30,951 | 29,330 |
| 2021 | 31,115 | 29,130 |
| 2022 | 30,714 | 29,290 |
| 2023 | 29,891 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 11731
12 nearest ZIP centroids (any distance)
- 11740Greenlawn2.3 miPop 10,699 · Income $161,705
- 11725Commack2.4 miPop 29,050 · Income $168,324
- 11754Kings Park3.8 miPop 17,660 · Income $123,406
- 11721Centerport4.0 miPop 6,620 · Income $206,250
- 11746Huntington Station4.1 miPop 66,883 · Income $158,309
- 11768Northport4.4 miPop 21,908 · Income $163,435
- 11787Smithtown5.6 miPop 34,656 · Income $141,505
- 11743Huntington5.7 miPop 42,423 · Income $173,014
- 11788Hauppauge6.2 miPop 17,092 · Income $148,946
- 11717Brentwood6.4 miPop 64,969 · Income —
- 11729Deer Park7.0 miPop 26,647 · Income $138,350
- 11747Melville7.3 miPop 19,826 · Income $154,914
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 11731, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 11731 FAQ
- What city is ZIP code 11731 in?
- 11731 is in East Northport, NY.
- What county is 11731 in?
- 11731 is in Suffolk County.
- What is the median household income in 11731?
- The median household income in 11731 is $158,819.
- Which ZIP codes are near 11731?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 11731.