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.
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.
This page was last updated on July 3, 2015.