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  5. Area Code 650

Where Is Area Code 650?

Area code 650 is found in the US state of California. Primarily servicing the city of San Mateo (population: 135625), area code 650 covers 2 counties of California.

Located in the Pacific time zone, area code 650 is on the same time as Los Angeles, CA.

Area code 650 was brought into effect on August 2, 1997. 650 was split from the parent 415 area code.

Map of  with area code 650 highlighted

Counties in Area Code 650

  • San Mateo,
  • Santa Clara.

Most Populous Cities in Area Code 650

City County City Population Time Zone
San Mateo San Mateo 135,625 PST
Daly City San Mateo 111,074 PST
Redwood City San Mateo 107,459 PST
Palo Alto Santa Clara 95,392 PST
Mountain View Santa Clara 76,985 PST
South San Francisco San Mateo 65,832 PST
San Bruno San Mateo 42,324 PST
Los Altos Santa Clara 42,166 PST
Burlingame San Mateo 41,919 PST
Menlo Park San Mateo 41,702 PST
Pacifica San Mateo 38,378 PST
San Carlos San Mateo 30,012 PST
Belmont San Mateo 26,746 PST
Millbrae San Mateo 22,161 PST
Half Moon Bay San Mateo 18,958 PST
Stanford Santa Clara 14,296 PST
Atherton San Mateo 7,294 PST
Portola Valley San Mateo 6,723 PST
Brisbane San Mateo 4,406 PST
Moss Beach San Mateo 3,128 PST
Montara San Mateo 2,997 PST
La Honda San Mateo 1,604 PST
Pescadero San Mateo 1,599 PST

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.

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This page was last modified on July 3, 2015.