ZIP Code 11787
standardSource:
Smithtown · Suffolk County · New York
- Population
- 35,772
- Median income
- $143,101
- Median home value
- $679,800
- Bachelor's or higher
- 52.9%
- Land area
- 38.9 sq mi
920/sq mi
▲ 88% vs US
higher than 95% of US ZIPs
▲ 144% vs US
higher than 93% of US ZIPs
Median age 46.3
New York
ZIP code 11787 in Smithtown, New York has a population of 35,772. The median household income is $143,101, which is 88% above the national average. Median home value is $679,800, 144% above the US average. 52.9% of residents hold a bachelor's degree or higher.
ZIP code 11787 is classified by USPS as a standard delivery area and covers roughly 38.9 square miles in Smithtown, Suffolk County, New York. The area is home to 35,772 residents, producing a population density of 920 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 11787 against New York and the nation.
On the economic side, the median household income for ZIP 11787 sits at $143,101 (55% above the New York average), while per-capita income is $62,426. The poverty rate stands at 4.8% and the unemployment rate at 3.4%. On housing, the median home value is $679,800 (80% above the state average) with median rent at $2,330 per month, and 87.3% of occupied units are owner-occupied, a direct signal of whether 11787 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 52.9% of adults hold a bachelor's degree or higher, the median age is 46.3, and the average commute is 32 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Suffolk County, so you can benchmark 11787 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 11787
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 11787.
- Health care and social assistance
Health care and social assistance
267 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
208 establishments
- Construction
Construction
169 establishments
- Other services (except public administration)
Other services (except public administration)
146 establishments
- Retail trade
Retail trade
118 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 11787, Smithtown, 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
35,772
Population
38.9
Area (sq mi)
920
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 11787?
46.3
Median Age
49.6%
Male
50.4%
Female
9.3%
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?
$143,101
Median Household Income
+55% vs state
$62,426
Per Capita Income
4.8%
Poverty Rate
3.4%
Unemployment Rate
32.4 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?
12,136
Total Housing Units
11,857
Occupied Units
279
Vacant Units
2.84
Avg Household Size
Occupancy Type
$679,800
Median Home Value
+80% vs state
$2,330
Median Rent
1967
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
+11.0%
YoY Change (2024)
263
HPI Index (2000 = 100)
+163%
Total Change Since 2000
Home values in ZIP 11787 have increased 11.0% over the past year (2024). Since 2000, this ZIP has seen +163% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +4.7% | 189 |
| 2021 | +8.1% | 204 |
| 2022 | +12.2% | 229 |
| 2023 | +3.5% | 237 |
| 2024 | +11.0% | 263 |
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 1,454 business establishments in ZIP 11787, employing approximately 18,002 people with a combined annual payroll of $925,997,000.
1,454
Businesses
18,002
Employees
$926.0M
Annual Payroll
16
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Health care and social assistance | 267 | 18.4% |
| Professional, scientific, and technical services | 208 | 14.3% |
| Construction | 169 | 11.6% |
| Other services (except public administration) | 146 | 10.0% |
| Retail trade | 118 | 8.1% |
| Accommodation and food services | 113 | 7.8% |
| Finance and insurance | 94 | 6.5% |
| Administrative and support and waste management and remediation services | 93 | 6.4% |
| Real estate and rental and leasing | 63 | 4.3% |
| Wholesale trade | 54 | 3.7% |
| Educational services | 47 | 3.2% |
| Arts, entertainment, and recreation | 23 | 1.6% |
| Information | 18 | 1.2% |
| Manufacturing | 16 | 1.1% |
| Transportation and warehousing | 16 | 1.1% |
| Management of companies and enterprises | 5 | 0.3% |
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 11787 vs 11788 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 11788 | Hauppauge, NY | 16,821 | 2.4 mi |
| 11754 | Kings Park, NY | 18,958 | 3.1 mi |
| 11767 | Nesconset, NY | 14,530 | 3.5 mi |
| 11780 | Saint James, NY | 15,524 | 3.4 mi |
| 11725 | Commack, NY | 29,150 | 3.8 mi |
| 11722 | Central Islip, NY | 35,177 | 4.9 mi |
| 11749 | Islandia, NY | 3,345 | 3.8 mi |
| 11755 | Lake Grove, NY | 12,387 | 4.9 mi |
| 11717 | Brentwood, NY | 60,745 | 5.3 mi |
| 11731 | East Northport, NY | 30,184 | 5.6 mi |
More ZIP Codes in Suffolk County
Related Areas
Frequently Asked Questions
What county is ZIP code 11787 in? ▼
What is the population of ZIP code 11787? ▼
What is the median household income in ZIP 11787? ▼
What is the average home value in ZIP 11787? ▼
What is the demographic makeup of ZIP 11787? ▼
How many businesses are in ZIP code 11787? ▼
What are the main industries in ZIP code 11787? ▼
How have home values changed in ZIP code 11787? ▼
What is the education level in ZIP code 11787? ▼
What is the average commute time in ZIP 11787? ▼
What percentage of residents own vs. rent in ZIP 11787? ▼
What is the poverty rate in ZIP code 11787? ▼
ZIP Code Research Guides
Official Data Resources for Smithtown, 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.