PlainZIP

Syosset, NY · standard

ZIP Code 11791

Nassau County, New York - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

25,076
746/sq mi
$202,962
Median income
$937,700
Median home value
70.4%
Bachelor's or higher

The verdict

Syosset pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.

Top 1%
household income, US ZIPs
Top 3%
home value, US ZIPs
746
people per sq mi
94%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 11791 against every reporting US ZIP.

ZIP code 11791 is a densely settled ZIP (a standard USPS delivery area) in Syosset, Nassau County, New York, with 25,076 residents across 33.6 square miles, a density of 746 people per square mile, in the New York time zone.

ZIP 11791 skews affluent, with a median household income of $202,962 (119% above the New York average), while per-capita income is $88,245. Poverty here runs at 4.1%, with unemployment measured at 4.9%. Housing costs here run $937,700 for a typical home value (148% above the state average), with rent averaging $3,019 a month; 93.5% of homes are owner-occupied.

This is a highly-educated ZIP: 70.4% of adults hold a bachelor's degree or higher, the median age is 43.2, and the average commute is 40 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 11791, plus 6 more within Nassau County, give a clearer read than the national average alone.

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 11791

Top 5 sectors by establishment count in Syosset, NY

Which industries have the most business establishments in ZIP 11791.

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 11791, Syosset, 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

25,076

Population

33.6

Area (sq mi)

746

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 11791?

43.2

Median Age

49.9%

Male

50.1%

Female

24.1%

Foreign-Born

White 59.1%
African American 1.1%
Asian 33.1%
American Indian or Alaska Native 0.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 4.8%
Hispanic or Latino 4.9%

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?

$202,962

Median Household Income

+119% vs state

$88,245

Per Capita Income

4.1%

Poverty Rate

4.9%

Unemployment Rate

39.8 min

Mean Commute Time

How ZIP 11791 ranks nationally

Syosset, NY household income vs. every US ZIP code

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

$202,962 Top 1% higher than 99% 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%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). Below this entry. $180,000–$200,000: 186 US ZIPs (1%). Below this entry. $200,000–$220,000: 324 US ZIPs (1%). This entry sits in this band. 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 81.6%
Bachelor's Degree or Higher 70.4%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

8,322

Total Housing Units

8,113

Occupied Units

209

Vacant Units

3.11

Avg Household Size

Occupancy Type

Owner 93.5%
Renter 6.5%

$937,700

Median Home Value

+148% vs state

$3,019

Median Rent

1959

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

+14.1%

YoY Change (2024)

296

HPI Index (2000 = 100)

+196%

Total Change Since 2000

Home values in ZIP 11791 have increased 14.1% over the past year (2024). Since 2000, this ZIP has seen +196% cumulative appreciation.

Year Annual Change HPI Index
2020 +1.6% 211
2021 +5.3% 223
2022 +16.5% 259
2023 +0.1% 260
2024 +14.1% 296

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 1,283 business establishments in ZIP 11791, employing approximately 16,204 people with a combined annual payroll of $1,155,436,000.

1,283

Businesses

16,204

Employees

$1.2B

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 235 18.3%
Health care and social assistance 171 13.3%
Wholesale trade 124 9.7%
Retail trade 124 9.7%
Other services (except public administration) 103 8.0%
Accommodation and food services 87 6.8%
Construction 83 6.5%
Real estate and rental and leasing 81 6.3%
Finance and insurance 67 5.2%
Administrative and support and waste management and remediation services 67 5.2%
Educational services 40 3.1%
Arts, entertainment, and recreation 31 2.4%
Transportation and warehousing 25 1.9%
Information 19 1.5%
Manufacturing 18 1.4%
Management of companies and enterprises 7 0.6%

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 11791 vs 11797 →

ZIP 11791 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 11791 ranks #3 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 11791 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 11791 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
11797 Woodbury, NY 9,041 2.0 mi
11732 East Norwich, NY 3,430 2.0 mi
11771 Oyster Bay, NY 10,007 2.9 mi
11753 Jericho, NY 12,014 3.2 mi
11803 Plainview, NY 28,127 3.6 mi
11801 Hicksville, NY 39,553 4.7 mi
11545 Glen Head, NY 12,065 4.4 mi
11724 Cold Spring Harbor, NY 3,220 3.7 mi
11714 Bethpage, NY 22,658 6.0 mi
11765 Mill Neck, NY 737 4.7 mi

More ZIP Codes in Nassau County

11550 standard
Hempstead, NY
Pop: 56,435
11758 standard
Massapequa, NY
Pop: 53,804
11590 standard
Westbury, NY
Pop: 45,768
11520 standard
Freeport, NY
Pop: 43,341
11756 standard
Levittown, NY
Pop: 42,791
11003 standard
Elmont, NY
Pop: 41,356

Related Areas

Nassau County Syosset, NY New York

Frequently Asked Questions

What county is ZIP code 11791 in? ▼
ZIP code 11791 (Syosset) is located in Nassau County, New York. Nassau County contains multiple ZIP codes, see the full list at /counties/nassau-ny.
What is the population of ZIP code 11791? ▼
ZIP code 11791 in Syosset, NY has a population of 25,076 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 11791? ▼
The median household income in ZIP 11791 is $202,962, which is 166% above the national average of $76,288.
What is the average home value in ZIP 11791? ▼
The median home value in ZIP 11791 is $937,700, which is 237% above the national average of $278,155.
What is the demographic makeup of ZIP 11791? ▼
The largest racial group in ZIP 11791 is White at 59.1%. Hispanic or Latino residents make up 4.9% of the population.
How many businesses are in ZIP code 11791? ▼
ZIP code 11791 has 1,283 business establishments employing approximately 16,204 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 11791? ▼
The top industries by establishment count in ZIP 11791 are: Professional, scientific, and technical services (235), Health care and social assistance (171), Wholesale trade (124). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 11791? ▼
According to the FHFA House Price Index, home values in ZIP 11791 increased by 14.1% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 196%. 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 11791? ▼
In ZIP code 11791, 81.6% of residents aged 25+ have a high school diploma or higher, and 70.4% 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 11791? ▼
The mean commute time for workers in ZIP code 11791 is 39.8 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 11791? ▼
In ZIP code 11791, approximately 93.5% of occupied housing units are owner-occupied and 6.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 11791? ▼
The poverty rate in ZIP code 11791 is 4.1% 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.