PlainZIP

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
$143,101
Median income
$679,800
Median home value
52.9%
Bachelor's or higher

The verdict

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.

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 New York average), while per-capita income is $62,426. Poverty here runs at 4.8%, with unemployment measured 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.

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. To put 11787 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 11787

Top 5 sectors by establishment count in Smithtown, NY

Which industries have the most business establishments in ZIP 11787.

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 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

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 11787?

46.3

Median Age

49.6%

Male

50.4%

Female

9.3%

Foreign-Born

White 82.3%
African American 1.5%
Asian 4.8%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 9.4%
Hispanic or Latino 11.5%

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

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

$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 72.7%
Bachelor's Degree or Higher 52.9%

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

Owner 87.3%
Renter 12.7%

$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 11787 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 11787 ranks #2 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 11787 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 11787 ranks #6 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
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

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 Smithtown, NY New York

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.

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