Residential delivery area · New York
ZIP Code 11951: Mastic Beach, NY
ZIP code 11951 is in Mastic Beach, New York, entirely in Suffolk County (Census 2020 ZIP-county file). About 16,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $110,862 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Mastic Beach · its only residential ZIP
- County
- Suffolk County
- Census places
- Mastic Beach census-designated place
- Metro area
- New York-Newark-Jersey City, NY-NJ
- House district
- NY-2 119th Congress
- State
- New York
- Time zone
- Eastern
- Land area
- 4.8 sq mi · 3,321 people per sq mi
Where is ZIP code 11951?
11951 centers on 40.766°, -72.837° and covers 4.8 square miles of land plus 1.1 of water. It borders 4 ZIP codes: 11950, 11934, 11967, 11955.
The map draws ZIP code areas only. For the streets inside 11951, 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 11951 compare with the rest of Suffolk County?
| Measure | 11951 | In Suffolk County | In NY |
|---|---|---|---|
| People (ACS 2020-2024) | 15,938 | 35th of 108 | 388th of 1,826 |
| Median household income | $111k | 68th of 81 | 292nd of 1,081 |
| Median home value | $355k | 88th of 88 | 490th of 1,172 |
Its median household income is higher than in 87% of U.S. residential ZIP codes, and it is denser than 90% 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 11951?
The 2020 Census counted 13,827 people in 11951; the ACS, which samples households over 2020-2024, estimates 15,938. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 15,938±1,963 (90% margin)
- 2020 Census count
- 13,827
- Households
- 5,050
- Median age
- 35.6
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 11951?
Of the 15,938 people the ACS estimates in 11951, 32.0% are under 18 and 11.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (63.0%), then Hispanic or Latino (15.8%).
- Under 1832.0%
- 18 to 6457.0%
- 65 and older11.0%
- White, not Hispanic63.0%
- Hispanic or Latino15.8%
- Black, not Hispanic12.5%
- Other or two or more5.6%
- Asian, not Hispanic3.0%
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 11951 earn?
Median household income is $110,862 (ACS 2020-2024), the 68th highest of the 81 ranked ZIP codes in Suffolk County.
- Median household income
- $110,862±$14,980
- Income per person
- $36,849
- Below the poverty line
- 21.8%
- Unemployed (of the labor force)
- 4.7%
- Adults 25+ with a bachelor's degree
- 24.0%
- Adjusted gross income per tax return, 2022
- $58,5646,800 returns; wages 81% 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 11951?
FHFA's house price index for 11951, built from repeat sales and appraisals of the same homes, rose 165% from 2015 to 2025 and rose 72% from 2020 to 2025, and moved +4.3% in 2025.
- Median home value (owners' estimate)
- $355,400
- Median gross rent
- $2,422
- Homes owned by their occupants
- 80.6%
- Housing units
- 5,407
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 11951?
155 business establishments had a location in this ZIP code in 2023, 26 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction58
- Other services (except public administration)21
- Accommodation and food services17
- Retail trade16
- Health care and social assistance13
- Administrative and support and waste management and remediation services11
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 11951?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 11950 | Mastic | 17,599 | $98k | 2.8 mi |
| 11934 | Center Moriches | 9,418 | $171k | 3.3 mi |
| 11967 | Shirley | 27,975 | $112k | 3.3 mi |
| 11955 | Moriches | 2,458 | $80k | 3.4 mi |
| 11719 | Brookhaven | 3,235 | $126k | 3.8 mi (near) |
| 11940 | East Moriches | 5,819 | $139k | 5.1 mi (near) |
| 11713 | Bellport | 9,218 | $108k | 5.6 mi (near) |
| 11980 | Yaphank | 5,855 | $103k | 6.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.