ZIP Code 11766
standardSource:
Mount Sinai · Suffolk County · New York
- Population
- 12,635
- Median income
- $153,235
- Median home value
- $649,600
- Bachelor's or higher
- 50.3%
- Land area
- 16.0 sq mi
791/sq mi
▲ 101% vs US
higher than 97% of US ZIPs
▲ 134% vs US
higher than 92% of US ZIPs
Median age 49
New York
ZIP code 11766 in Mount Sinai, New York has a population of 12,635. The median household income is $153,235, which is 101% above the national average. Median home value is $649,600, 134% above the US average. 50.3% of residents hold a bachelor's degree or higher.
ZIP code 11766 is classified by USPS as a standard delivery area and covers roughly 16.0 square miles in Mount Sinai, Suffolk County, New York. The area is home to 12,635 residents, producing a population density of 791 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 11766 against New York and the nation.
On the economic side, the median household income for ZIP 11766 sits at $153,235 (66% above the New York average), while per-capita income is $65,939. The poverty rate stands at 2.1% and the unemployment rate at 2.4%. On housing, the median home value is $649,600 (72% above the state average) with median rent at $3,088 per month, and 92.5% of occupied units are owner-occupied, a direct signal of whether 11766 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 50.3% of adults hold a bachelor's degree or higher, the median age is 49, and the average commute is 36 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Suffolk County, so you can benchmark 11766 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 11766
Top 5 sectors by establishment count
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 + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, 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; HUD FMR + 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
$65,939
Per Capita Income
2.1%
Poverty Rate
2.4%
Unemployment Rate
35.8 min
Mean Commute Time
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?
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
$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 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 |
More ZIP Codes in Suffolk County
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Frequently Asked Questions
What county is ZIP code 11766 in? ▼
What is the population of ZIP code 11766? ▼
What is the median household income in ZIP 11766? ▼
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What is the demographic makeup of ZIP 11766? ▼
How many businesses are in ZIP code 11766? ▼
What are the main industries in ZIP code 11766? ▼
How have home values changed in ZIP code 11766? ▼
What is the education level in ZIP code 11766? ▼
What is the average commute time in ZIP 11766? ▼
What percentage of residents own vs. rent in ZIP 11766? ▼
What is the poverty rate in ZIP code 11766? ▼
ZIP Code Research Guides
Official Data Resources for Mount Sinai, NY
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.