ZIP code 11787
Where is ZIP code 11787?
Smithtown, New York
Suffolk County · Standard ZIP code
ZIP code 11787 belongs to Smithtown, New York in Suffolk County. 11787 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 631 and 934. About 34,499 people live in the 11787 area, where the median household income is $143,101. The closest ZIP codes are 11788 (Hauppauge, 2.3 mi southeast), 11754 (Kings Park, 2.7 mi northwest) and 11780 (Saint James, 3.4 mi northeast).
| ZIP code | 11787 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Smithtown |
| State | New York (NY) |
| County | Suffolk County |
| Time zone | Eastern Time · now |
| Area codes | 631, 934 |
| Coordinates | 40.8542, -73.2138 map |
| 3-digit prefix | 117 |
Population and income in 11787
| Population | 34,499 · higher than 90% of New York ZIP codes |
|---|---|
| People per square mile | 2,316 · higher than 76% of New York ZIP codes |
| Median age | 46.3 years · higher than 64% of New York ZIP codes |
| Men / women | 50% / 50% |
| Median household income | $143,101 · higher than 89% of New York ZIP codes |
| Income per person | $62,426 |
| Below the poverty line | 4.8% |
| Bachelor’s degree or higher | 53% of adults 25+ |
| Median home value | $679,800 · higher than 85% of New York ZIP codes |
| Median rent | $2,330 a month |
| Housing units | 12,136 |
| Households | 11,857 (2.84 people on average) |
| Owners / renters | 87% / 13% |
| Land area | 14.9 sq mi (plus 0.67 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 11787. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 11787
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 11788 | Hauppauge, NY | 2.3 mi SE | Standard |
| 11754 | Kings Park, NY | 2.7 mi NW | Standard |
| 11780 | Saint James, NY | 3.4 mi NE | Standard |
| 11767 | Nesconset, NY | 3.5 mi E | Standard |
| 11725 | Commack, NY | 3.5 mi W | Standard |
| 11749 | Islandia, NY | 4 mi SE | Standard |
| 11722 | Central Islip, NY | 4.8 mi S | Standard |
| 11755 | Lake Grove, NY | 5.1 mi E | Standard |
| 11731 | East Northport, NY | 5.3 mi W | Standard |
| 11779 | Ronkonkoma, NY | 5.4 mi SE | Standard |
| 11717 | Brentwood, NY | 5.4 mi S | Standard |
| 11790 | Stony Brook, NY | 5.8 mi NE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 11787 or measure the distance to another ZIP code.
How to address mail to 11787
123 MAIN ST
SMITHTOWN NY 11787
Put the city, the two-letter state code and the ZIP code on the last line. Avoid Village Of The Branch: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (11787-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 11787?
- 11787 is a Smithtown, New York ZIP code.
- What county is 11787 in?
- ZIP code 11787 is in Suffolk County, New York.
- What time zone is ZIP code 11787 in?
- 11787 is in the Eastern Time zone (America/New_York).
- What area code is 11787?
- Phone numbers in ZIP code 11787 use area codes 631 and 934.
- What is the population of ZIP code 11787?
- About 34,499 people live in ZIP code 11787, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 11787?
- The median household income in 11787 is $143,101 a year, higher than 89% of New York ZIP codes.
- What ZIP codes are near 11787?
- The nearest ZIP codes to 11787 are 11788 (Hauppauge, 2.3 miles), 11754 (Kings Park, 2.7 miles), 11780 (Saint James, 3.4 miles) and 11767 (Nesconset, 3.5 miles).