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  5. Area Code 503

Where Is Area Code 503?

Area code 503 is found in the US state of Oregon. Primarily servicing the city of Portland (population: 635659), area code 503 covers 10 counties of Oregon.

Located in the Pacific time zone, area code 503 is on the same time as Los Angeles, CA.

Area code 503 was brought into effect on January 1, 1947.

Map of  with area code 503 highlighted

Counties in Area Code 503

  • Clackamas,
  • Clatsop,
  • Columbia,
  • Linn,
  • Marion,
  • Multnomah,
  • Polk,
  • Tillamook,
  • Washington,
  • Yamhill.

Most Populous Cities in Area Code 503

City County City Population Time Zone
Portland Multnomah 635,659 PST
Salem Marion 224,463 PST
Beaverton Washington 190,098 PST
Portland Washington 165,635 PST
Hillsboro Washington 96,017 PST
Gresham Multnomah 80,104 PST
Portland Clackamas 67,196 PST
Oregon City Clackamas 52,433 PST
Lake Oswego Clackamas 43,753 PST
McMinnville Yamhill 36,527 PST
Woodburn Marion 29,234 PST
West Linn Clackamas 28,897 PST
Salem Polk 28,812 PST
Newberg Yamhill 28,588 PST
Tualatin Washington 28,314 PST
Happy Valley Clackamas 26,554 PST
Forest Grove Washington 24,921 PST
Sherwood Washington 24,243 PST
Canby Clackamas 23,162 PST
Troutdale Multnomah 21,916 PST
Wilsonville Clackamas 21,425 PST
Dallas Polk 20,297 PST
Clackamas Clackamas 19,929 PST
Sandy Clackamas 17,712 PST
Astoria Clatsop 16,978 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.