Residential delivery area · New York
ZIP Code 11780: Saint James, NY
ZIP code 11780 uses the postal name Saint James, New York and lies entirely in Suffolk County (Census 2020 ZIP-county file). About 15,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $144,577 (Census Bureau, ACS 2020-2024). By Census place, its land lies in St. James (35%), Nissequogue (33%), Head of the Harbor (22%) and Smithtown (7%); 3% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Saint James · its only residential ZIP
- County
- Suffolk County
- Census places
- St. James (35%) census-designated place; Nissequogue (33%); Head of the Harbor (22%); Smithtown (7%) 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
- 11.5 sq mi · 1,306 people per sq mi
Where is ZIP code 11780?
11780 centers on 40.911°, -73.173° and covers 11.5 square miles of land plus 4.0 of water. It borders 5 ZIP codes: 11790, 11754, 11787, 11767, 11755.
The map draws ZIP code areas only. For the streets inside 11780, 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 11780 compare with the rest of Suffolk County?
| Measure | 11780 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 15,018 | 38th of 108 | 403rd of 1,826 |
| Median household income | $145k | 29th of 81 | 125th of 1,081 |
| Median home value | $723k | 24th of 88 | 170th of 1,172 |
Its median household income is higher than in 96% of U.S. residential ZIP codes, and it is denser than 81% 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 11780?
The 2020 Census counted 15,508 people in 11780; the ACS, which samples households over 2020-2024, estimates 15,018. Between the 2010 and 2020 censuses its population fell 0.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 15,018
- 2020 Census count
- 15,508−0.1% since 2010 (15,524)
- Households
- 5,459
- Median age
- 47.4
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 11780?
Of the 15,018 people the ACS estimates in 11780, 19.9% are under 18 and 22.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (80.1%), then Hispanic or Latino (11.8%).
- Under 1819.9%
- 18 to 6457.6%
- 65 and older22.5%
- White, not Hispanic80.1%
- Hispanic or Latino11.8%
- Asian, not Hispanic5.8%
- Other or two or more2.0%
- Black, not Hispanic0.4%
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 11780 earn?
Median household income is $144,577 (ACS 2020-2024), the 29th highest of the 81 ranked ZIP codes in Suffolk County. It is not measurably different from 2015-2019 ($154,122 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $144,577±$17,398
- Income per person
- $75,677
- Below the poverty line
- 3.2%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 52.1%
- Adjusted gross income per tax return, 2022
- $251,4978,190 returns; wages 51% 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 11780?
FHFA's house price index for 11780, built from repeat sales and appraisals of the same homes, rose 80% from 2015 to 2025 and rose 49% from 2020 to 2025, and moved +4.9% in 2025.
- Median home value (owners' estimate)
- $723,200
- Median gross rent
- $2,316
- Homes owned by their occupants
- 87.4%
- Housing units
- 5,795
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 11780?
557 business establishments had a location in this ZIP code in 2023, 12 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services83
- Other services (except public administration)81
- Construction74
- Retail trade63
- Health care and social assistance52
- Administrative and support and waste management and remediation services44
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 11780?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11790 | Stony Brook | 21,074 | $171k | 2.4 mi |
| 11754 | Kings Park | 17,565 | $123k | 4.4 mi |
| 11787 | Smithtown | 34,499 | $143k | 4.5 mi |
| 11767 | Nesconset | 14,964 | $153k | 4.6 mi |
| 11755 | Lake Grove | 12,144 | $119k | 4.7 mi |
| 11794 | Stony Brook | 831 | – | 2.5 mi (near) |
| 11733 | East Setauket | 17,752 | $173k | 3.7 mi (near) |
| 11720 | Centereach | 29,292 | $135k | 5.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.