Mount Sinai, NY · standard
ZIP Code 11766
Suffolk County, New York - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 12,635
- 791/sq mi High-density area
- $153,235
- Median income Above-median income area
- $649,600
- Median home value Above-median home value
- 50.3%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Mount Sinai pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 3%
- household income, US ZIPs
- Top 8%
- home value, US ZIPs
- 791
- people per sq mi
- 93%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 11766 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 11766 (Mount Sinai, NY) rose +10.4% from 2023 to 2024. The all-transactions index moved from 244.2 in 2023 to 269.5 in 2024 (2000 = 100).
ZIP code 11766 is a mid-sized community (a standard USPS delivery area) in Mount Sinai, Suffolk County, New York, home to 12,635 residents across 16.0 square miles, a density of 791 people per square mile, in the New York time zone.
ZIP 11766 skews affluent, with a median household income of $153,235 (66% above the average New York ZIP), while per-capita income is $65,939. Both reported hardship measures are comparatively low in absolute terms: poverty is 2.1% and unemployment is 2.4%. Housing is both higher-cost and owner-heavy: median home value is $649,600 (72% above the average New York ZIP), while 92.5% of occupied homes are owner-occupied and median rent is $3,088.
This is a highly-educated ZIP: 50.3% of adults hold a bachelor's degree or higher, the median age is 49, and the average commute is 36 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Suffolk County, so 11766 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 11766
Top 5 sectors by establishment count in Mount Sinai, NY
Which industries have the most business establishments in ZIP 11766.
- Construction
Construction
52 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
50 establishments
- Retail trade
Retail trade
40 establishments
- Other services (except public administration)
Other services (except public administration)
40 establishments
- Health care and social assistance
Health care and social assistance
35 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 11766, Mount Sinai, NY · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
12,635
Population
16.0
Area (sq mi)
791
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 11766?
49.0
Median Age
49.5%
Male
50.5%
Female
8.1%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$153,235
Median Household Income
+66% vs state ZIP avg
$65,939
Per Capita Income
2.1%
Poverty Rate
2.4%
Unemployment Rate
35.8 min
Mean Commute Time
How ZIP 11766 ranks among New York ZIPs
Mount Sinai, NY household income vs. every New York ZIP code
Median household income among 1,626 reporting New York ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$153,235 Top 8% higher than 92% of 1,626 New York ZIPs
Each bar is a $20K-wide band; taller bars hold more New York ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
4,130housing units
4,130
Total Housing Units
3,934
Occupied Units
196
Vacant Units
2.71
Avg Household Size
Occupancy Type
$649,600
Median Home Value
+72% vs state ZIP avg
$3,088
Median Rent
1985
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+10.4%
YoY Change (2024)
270
HPI Index (2000 = 100)
+170%
Total Change Since 2000
Home values in ZIP 11766 have increased 10.4% over the past year (2024). Since 2000, this ZIP has seen +170% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +3.6% | 187 |
| 2021 | +9.7% | 205 |
| 2022 | +12.3% | 230 |
| 2023 | +6.3% | 244 |
| 2024 | +10.4% | 270 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 345 business establishments in ZIP 11766, employing approximately 1,814 people with a combined annual payroll of $79,987,000.
345
Businesses
1,814
Employees
$80.0M
Annual Payroll
14
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 52 | 15.1% |
| Professional, scientific, and technical services | 50 | 14.5% |
| Retail trade | 40 | 11.6% |
| Other services (except public administration) | 40 | 11.6% |
| Health care and social assistance | 35 | 10.1% |
| Accommodation and food services | 30 | 8.7% |
| Administrative and support and waste management and remediation services | 27 | 7.8% |
| Wholesale trade | 21 | 6.1% |
| Finance and insurance | 17 | 4.9% |
| Real estate and rental and leasing | 8 | 2.3% |
| Arts, entertainment, and recreation | 6 | 1.7% |
| Manufacturing | 4 | 1.2% |
| Transportation and warehousing | 4 | 1.2% |
| Educational services | 4 | 1.2% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 11766 vs 11764 →
ZIP 11766 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11727
Coram (11727)
29,030 residents
- 11784
Selden (11784)
24,655 residents
- 11776
Port Jefferson Station (11776)
24,235 residents
- 11733
East Setauket (11733)
18,949 residents
- 11738
Farmingville (11738)
17,638 residents
- 11953
Middle Island (11953)
13,553 residents
- 11764
Miller Place (11764)
13,200 residents
- 11778
Rocky Point (11778)
12,709 residents
- 11766
Mount Sinai (11766)
12,635 residents
What this shows Among its immediate neighbors, ZIP 11766 ranks #9 by population - useful context the national average alone can't give.
ZIP 11766 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11733
East Setauket (11733)
$173,281 median income
- 11766
Mount Sinai (11766)
$153,235 median income
- 11777
Port Jefferson (11777)
$150,505 median income
- 11764
Miller Place (11764)
$146,813 median income
- 11738
Farmingville (11738)
$140,121 median income
- 11789
Sound Beach (11789)
$131,528 median income
- 11778
Rocky Point (11778)
$126,349 median income
- 11776
Port Jefferson Station (11776)
$120,573 median income
- 11784
Selden (11784)
$104,369 median income
What this shows By household income, ZIP 11766 ranks #2 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 11764 | Miller Place, NY | 13,200 | 2.1 mi |
| 11776 | Port Jefferson Station, NY | 24,235 | 2.2 mi |
| 11777 | Port Jefferson, NY | 8,968 | 2.7 mi |
| 11789 | Sound Beach, NY | 7,895 | 2.8 mi |
| 11727 | Coram, NY | 29,030 | 3.8 mi |
| 11733 | East Setauket, NY | 18,949 | 4.7 mi |
| 11784 | Selden, NY | 24,655 | 4.8 mi |
| 11778 | Rocky Point, NY | 12,709 | 4.5 mi |
| 11953 | Middle Island, NY | 13,553 | 4.9 mi |
| 11738 | Farmingville, NY | 17,638 | 6.8 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 11766, both outside NY so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (12,635 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Suffolk County
Related Areas
Frequently Asked Questions
What county is ZIP code 11766 in?
ZIP code 11766 (Mount Sinai) is located in Suffolk County, New York. Suffolk County contains multiple ZIP codes, see the full list at /counties/suffolk-ny.
What is the population of ZIP code 11766?
ZIP code 11766 in Mount Sinai, NY has a population of 12,635 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 11766?
The median household income in ZIP 11766 is $153,235, which is 101% above the national average of $76,288.
What is the average home value in ZIP 11766?
The median home value in ZIP 11766 is $649,600, which is 134% above the national average of $278,155.
What is the demographic makeup of ZIP 11766?
The largest racial group in ZIP 11766 is White at 83.7%. Hispanic or Latino residents make up 11.3% of the population.
How many businesses are in ZIP code 11766?
ZIP code 11766 has 345 business establishments employing approximately 1,814 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 11766?
The top industries by establishment count in ZIP 11766 are: Construction (52), Professional, scientific, and technical services (50), Retail trade (40). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 11766?
According to the FHFA House Price Index, home values in ZIP 11766 increased by 10.4% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 170%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 11766?
In ZIP code 11766, 71.4% of residents aged 25+ have a high school diploma or higher, and 50.3% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 11766?
The mean commute time for workers in ZIP code 11766 is 35.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 11766?
In ZIP code 11766, approximately 92.5% of occupied housing units are owner-occupied and 7.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 11766?
The poverty rate in ZIP code 11766 is 2.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 11766's numbers, next.
- See how ZIP 11766 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Mount Sinai, NY ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.