Residential delivery area · New York
ZIP Code 11971: Southold, NY
ZIP code 11971 is in Southold, New York, entirely in Suffolk County (Census 2020 ZIP-county file). About 6,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $129,507 (Census Bureau, ACS 2020-2024). By Census place, 94% of its land lies in Southold (a census-designated place), and 6% in smaller places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Southold · its only residential ZIP
- County
- Suffolk County
- Census places
- Southold 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
- 11.0 sq mi · 580 people per sq mi
Where is ZIP code 11971?
11971 centers on 41.065°, -72.429° and covers 11.0 square miles of land plus 4.1 of water. It borders 2 ZIP codes: 11958, 11944.
The map draws ZIP code areas only. For the streets inside 11971, 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 11971 compare with the rest of Suffolk County?
| Measure | 11971 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 6,361 | 66th of 108 | 652nd of 1,826 |
| Median household income | $130k | 45th of 81 | 180th of 1,081 |
| Median home value | $843k | 16th of 88 | 125th of 1,172 |
Its median household income is higher than in 93% of U.S. residential ZIP codes, and it is denser than 73% 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 11971?
The 2020 Census counted 6,105 people in 11971; the ACS, which samples households over 2020-2024, estimates 6,361. Between the 2010 and 2020 censuses its population grew 4.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,361±781 (90% margin)
- 2020 Census count
- 6,105+4.9% since 2010 (5,818)
- Households
- 2,437
- Median age
- 48.7
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 11971?
Of the 6,361 people the ACS estimates in 11971, 23.0% are under 18 and 25.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (78.2%), then Hispanic or Latino (14.7%).
- Under 1823.0%
- 18 to 6451.7%
- 65 and older25.4%
- White, not Hispanic78.2%
- Hispanic or Latino14.7%
- Other or two or more3.2%
- Asian, not Hispanic3.2%
- Black, not Hispanic0.7%
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 11971 earn?
Median household income is $129,507 (ACS 2020-2024), the 45th highest of the 81 ranked ZIP codes in Suffolk County. It rose from $93,558 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $129,507±$28,514
- Income per person
- $76,891
- Below the poverty line
- 3.9%
- Unemployed (of the labor force)
- 6.0%
- Adults 25+ with a bachelor's degree
- 55.2%
- Adjusted gross income per tax return, 2022
- $161,6013,210 returns; wages 46% 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 11971?
FHFA's house price index for 11971, built from repeat sales and appraisals of the same homes, rose 91% from 2015 to 2025 and rose 52% from 2020 to 2025, and moved +4.1% in 2025.
- Median home value (owners' estimate)
- $843,300
- Median gross rent
- $2,335
- Homes owned by their occupants
- 84.3%
- Housing units
- 3,946
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 11971?
233 business establishments had a location in this ZIP code in 2023, 9 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction39
- Accommodation and food services30
- Retail trade28
- Professional, scientific, and technical services25
- Administrative and support and waste management and remediation services21
- Health care and social assistance20
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 11971?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11958 | Peconic | 884 | – | 2.6 mi |
| 11944 | Greenport | 5,037 | $85k | 3.9 mi |
| 11935 | Cutchogue | 2,863 | $144k | 4.3 mi (near) |
| 11956 | New Suffolk | 298 | $131k | 5.6 mi (near) |
| 11965 | Shelter Island Heights | 404 | – | 6.7 mi (near) |
| 11964 | Shelter Island | 2,906 | $135k | 6.7 mi (near) |
| 11963 | Sag Harbor | 8,390 | $128k | 7.2 mi (near) |
| 11952 | Mattituck | 5,040 | $120k | 7.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.