Smithtown, NY · standard
ZIP Code 11787
Suffolk County, New York - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 35,772
- 920/sq mi High-density area
- $143,101
- Median income Above-median income area
- $679,800
- Median home value Above-median home value
- 52.9%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Smithtown pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 5%
- household income, US ZIPs
- Top 7%
- home value, US ZIPs
- 920
- people per sq mi
- 87%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 11787 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 11787 (Smithtown, NY) rose +11.0% from 2023 to 2024. The all-transactions index moved from 236.7 in 2023 to 262.8 in 2024 (2000 = 100).
ZIP code 11787 is a densely settled ZIP (a standard USPS delivery area) in Smithtown, Suffolk County, New York, with 35,772 residents across 38.9 square miles, a density of 920 people per square mile, in the New York time zone.
ZIP 11787 skews affluent, with a median household income of $143,101 (55% above the average New York ZIP), while per-capita income is $62,426. Both reported hardship measures are comparatively low in absolute terms: poverty is 4.8% and unemployment is 3.4%. Housing is both higher-cost and owner-heavy: median home value is $679,800 (80% above the average New York ZIP), while 87.3% of occupied homes are owner-occupied and median rent is $2,330.
This is a highly-educated ZIP: 52.9% of adults hold a bachelor's degree or higher, the median age is 46.3, and the average commute is 32 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Suffolk County, so 11787 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 11787
Top 5 sectors by establishment count in Smithtown, NY
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 + FHFA HPI ACS demographics and median rent, ZBP business establishments, 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; 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 ZIP avg
$62,426
Per Capita Income
4.8%
Poverty Rate
3.4%
Unemployment Rate
32.4 min
Mean Commute Time
How ZIP 11787 ranks nationally
Smithtown, NY household income vs. every US ZIP code
Median household income, the full national distribution, with this ZIP marked
$143,101 Top 5% higher than 95% of 30,318 US ZIPs
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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
12,136housing units
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 ZIP avg
$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 11787 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11717
Brentwood (11717)
60,745 residents
- 11787
Smithtown (11787)
35,772 residents
- 11722
Central Islip (11722)
35,177 residents
- 11731
East Northport (11731)
30,184 residents
- 11725
Commack (11725)
29,150 residents
- 11754 18,958
Kings Park (11754)
18,958 residents
- 11788 16,821
Hauppauge (11788)
16,821 residents
- 11780 15,524
Saint James (11780)
15,524 residents
- 11767 14,530
Nesconset (11767)
14,530 residents
What this shows Among its immediate neighbors, ZIP 11787 ranks #2 by population - useful context the national average alone can't give.
ZIP 11787 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11725
Commack (11725)
$168,281 median income
- 11731
East Northport (11731)
$161,132 median income
- 11767
Nesconset (11767)
$152,985 median income
- 11788
Hauppauge (11788)
$149,726 median income
- 11780
Saint James (11780)
$144,577 median income
- 11787
Smithtown (11787)
$143,101 median income
- 11754
Kings Park (11754)
$123,393 median income
- 11755
Lake Grove (11755)
$119,364 median income
- 11749
Islandia (11749)
$116,313 median income
What this shows By household income, ZIP 11787 ranks #6 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 11787, 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 (35,772 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Suffolk County
Related Areas
Frequently Asked Questions
What county is ZIP code 11787 in?
ZIP code 11787 (Smithtown) 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 11787?
ZIP code 11787 in Smithtown, NY has a population of 35,772 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 11787?
The median household income in ZIP 11787 is $143,101, which is 88% above the national average of $76,288.
What is the average home value in ZIP 11787?
The median home value in ZIP 11787 is $679,800, which is 144% above the national average of $278,155.
What is the demographic makeup of ZIP 11787?
The largest racial group in ZIP 11787 is White at 82.3%. Hispanic or Latino residents make up 11.5% of the population.
How many businesses are in ZIP code 11787?
ZIP code 11787 has 1,454 business establishments employing approximately 18,002 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 11787?
The top industries by establishment count in ZIP 11787 are: Health care and social assistance (267), Professional, scientific, and technical services (208), Construction (169). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 11787?
According to the FHFA House Price Index, home values in ZIP 11787 increased by 11.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 163%. 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 11787?
In ZIP code 11787, 72.7% of residents aged 25+ have a high school diploma or higher, and 52.9% 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 11787?
The mean commute time for workers in ZIP code 11787 is 32.4 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 11787?
In ZIP code 11787, approximately 87.3% of occupied housing units are owner-occupied and 12.7% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 11787?
The poverty rate in ZIP code 11787 is 4.8% 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 11787's numbers, next.
- See how ZIP 11787 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Smithtown, NY ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.