ZIP code 11787: Smithtown, NY
11787 is a ZIP code in Smithtown, New York, mainly in Suffolk County, part of the New York-Newark-Jersey City, NY-NJ metro area. About 34,499 people live here.
- Population
- 34,499
- Median household income
- $143,101
- Typical home value
- $819,900+6.9% in 12 months
- Median rent
- $2,330gross, per month
- Median age
- 46.3
- Homeowners
- 87.3%of occupied homes
Shaded: ZIP code 11787's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 11787 details
| City | Smithtown |
|---|---|
| State | New York |
| County | Suffolk County |
| Metro area | New York-Newark-Jersey City, NY-NJ |
| Time zone | Eastern Time (UTC−5), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 14.9 sq mi, plus 0.7 sq mi of water |
| Population density | 2,315 people per sq mi |
| Bachelor's degree or higher | 52.9% of adults 25+ |
| Average commute | 32.4 minutes |
| Center coordinates | 40.85292, -73.21126 |
Median rent in 11787 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $2,042/mo |
| 2 bedrooms | $2,596/mo |
| 3 bedrooms | $3,320/mo |
| 4 bedrooms | $1,881/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 11787
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 11788 | Hauppauge, NY | 2.4 mi | 17,374 |
| 11754 | Kings Park, NY | 3.0 mi | 17,565 |
| 11767 | Nesconset, NY | 3.4 mi | 14,964 |
| 11725 | Commack, NY | 3.7 mi | 29,073 |
| 11749 | Islandia, NY | 3.8 mi | 3,600 |
| 11780 | Saint James, NY | 4.5 mi | 15,018 |
| 11722 | Central Islip, NY | 4.9 mi | 39,033 |
| 11755 | Lake Grove, NY | 4.9 mi | 12,144 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 11787?
A typical home in ZIP code 11787 is worth about $819,900 (Zillow Home Value Index). The median household here earns $143,101 a year. See what buying here would cost per month, with New York average taxes and insurance filled in.
Monthly payment for a $819,900 homeWhat can a $143,101 income afford?Rental property numbers
About ZIP code 11787
What city is ZIP code 11787?
ZIP code 11787 is in Smithtown, NY, in Suffolk County.
What county is ZIP code 11787 in?
11787 is mainly in Suffolk County, New York.
What is the population of ZIP code 11787?
About 34,499 people live in ZIP code 11787, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 11787 in?
11787 is in Eastern Time (UTC−5). It observes daylight saving time.