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 High-density area
- $202,962
- Median income Above-median income area
- $937,700
- Median home value Above-median home value
- 70.4%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 11791 (Syosset, NY) rose +14.1% from 2023 to 2024. The all-transactions index moved from 259.6 in 2023 to 296.1 in 2024 (2000 = 100).
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 average New York ZIP), while per-capita income is $88,245. The poverty rate is 4.1%, with unemployment at 4.9%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $937,700 (148% above the average New York ZIP), while 93.5% of occupied homes are owner-occupied and median rent is $3,019.
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. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Nassau County, so 11791 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 11791
Top 5 sectors by establishment count in Syosset, NY
Which industries have the most business establishments in ZIP 11791.
- Professional, scientific, and technical services
Professional, scientific, and technical services
235 establishments
- Health care and social assistance
Health care and social assistance
171 establishments
- Wholesale trade
Wholesale trade
124 establishments
- Retail trade
Retail trade
124 establishments
- Other services (except public administration)
Other services (except public administration)
103 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 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
Who lives in ZIP 11791?
43.2
Median Age
49.9%
Male
50.1%
Female
24.1%
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?
$202,962
Median Household Income
+119% vs state ZIP avg
$88,245
Per Capita Income
4.1%
Poverty Rate
4.9%
Unemployment Rate
39.8 min
Mean Commute Time
How ZIP 11791 ranks among New York ZIPs
Syosset, 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)
$202,962 Top 2% higher than 98% 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
8,322housing units
8,322
Total Housing Units
8,113
Occupied Units
209
Vacant Units
3.11
Avg Household Size
Occupancy Type
$937,700
Median Home Value
+148% vs state ZIP avg
$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.
- 11801
Hicksville (11801)
39,553 residents
- 11803
Plainview (11803)
28,127 residents
- 11791
Syosset (11791)
25,076 residents
- 11714
Bethpage (11714)
22,658 residents
- 11545 12,065
Glen Head (11545)
12,065 residents
- 11753 12,014
Jericho (11753)
12,014 residents
- 11771 10,007
Oyster Bay (11771)
10,007 residents
- 11797 9,041
Woodbury (11797)
9,041 residents
- 11732 3,430
East Norwich (11732)
3,430 residents
What this shows Among its immediate neighbors, ZIP 11791 ranks #3 by population - useful context the national average alone can't give.
ZIP 11791 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11724
Cold Spring Harbor (11724)
$250,000 median income
- 11791
Syosset (11791)
$202,962 median income
- 11765
Mill Neck (11765)
$196,902 median income
- 11797
Woodbury (11797)
$192,609 median income
- 11803
Plainview (11803)
$187,514 median income
- 11545
Glen Head (11545)
$182,528 median income
- 11753
Jericho (11753)
$175,781 median income
- 11771
Oyster Bay (11771)
$157,923 median income
- 11732
East Norwich (11732)
$148,965 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 11791, 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 (25,076 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Nassau County
Related Areas
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.
Related
Take this with you
What to do with ZIP 11791's numbers, next.
- See how ZIP 11791 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Syosset, NY ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.