PlainZIP

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
$153,235
Median income
$649,600
Median home value
50.3%
Bachelor's or higher

The verdict

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.

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 New York average), while per-capita income is $65,939. 2.1% of residents live below the poverty line, and the unemployment rate reads 2.4%. Median home value sits at $649,600 (72% above the state average), median rent at $3,088 a month, and owner-occupancy at 92.5%.

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. To put 11766 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Suffolk County, for a geography-aware comparison.

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.

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 · ZIP Code Business Patterns (ZBP) As of 2023

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

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 11766?

49.0

Median Age

49.5%

Male

50.5%

Female

8.1%

Foreign-Born

White 83.7%
African American 1.9%
Asian 3.2%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 9.7%
Hispanic or Latino 11.3%

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

How ZIP 11766 ranks nationally

Mount Sinai, NY household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$153,235 Top 3% higher than 97% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). This entry sits in this band. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 71.4%
Bachelor's Degree or Higher 50.3%

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

Owner 92.5%
Renter 7.5%

$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 11766 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 11766 ranks #9 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 11766 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

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.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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

11746 standard
Huntington Station, NY
Pop: 67,094
11706 standard
Bay Shore, NY
Pop: 62,543
11717 standard
Brentwood, NY
Pop: 60,745
11757 standard
Lindenhurst, NY
Pop: 45,700
11772 standard
Patchogue, NY
Pop: 44,837
11743 standard
Huntington, NY
Pop: 42,230

Related Areas

Suffolk County Mount Sinai, NY New York

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.

Read our methodology to see how this data is sourced, computed, and verified.