1. World Map/
  2. North America/
  3. US/
  4. Area Codes/
  5. Area Code 631

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.

Map of  with area code 631 highlighted

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.

Trending on WorldAtlas

This page was last updated on July 3, 2015.