Where Is Area Code 631?
Area code 631 is found in the US state of New York. Primarily servicing the city of Huntington Station (population: 67360), area code 631 covers 1 county of New York.
Located in the Eastern time zone, area code 631 is on the same time as New York, NY.
Area code 631 was brought into effect on November 1, 1999. 631 was split from the parent 516 area code.
Counties in Area Code 631
- Suffolk.
Most Populous Cities in Area Code 631
| City | County | City Population | Time Zone |
|---|---|---|---|
| Huntington Station | Suffolk | 67,360 | EST |
| Bay Shore | Suffolk | 62,791 | EST |
| Brentwood | Suffolk | 60,985 | EST |
| Lindenhurst | Suffolk | 45,881 | EST |
| Patchogue | Suffolk | 45,014 | EST |
| Huntington | Suffolk | 42,397 | EST |
| West Babylon | Suffolk | 40,381 | EST |
| Ronkonkoma | Suffolk | 38,573 | EST |
| Smithtown | Suffolk | 35,913 | EST |
| Central Islip | Suffolk | 35,316 | EST |
| East Northport | Suffolk | 30,303 | EST |
| Centereach | Suffolk | 29,304 | EST |
| Commack | Suffolk | 29,265 | EST |
| Coram | Suffolk | 29,145 | EST |
| Medford | Suffolk | 28,619 | EST |
| Deer Park | Suffolk | 28,143 | EST |
| Holbrook | Suffolk | 27,764 | EST |
| Riverhead | Suffolk | 27,279 | EST |
| Amityville | Suffolk | 27,216 | EST |
| Shirley | Suffolk | 26,688 | EST |
| West Islip | Suffolk | 26,133 | EST |
| Selden | Suffolk | 24,752 | EST |
| Port Jefferson Station | Suffolk | 24,331 | EST |
| Northport | Suffolk | 21,988 | EST |
| Stony Brook | Suffolk | 21,761 | EST |
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.
This page was last updated on July 3, 2015.